./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/chl-array-int-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:46:45,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:46:45,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:46:45,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:46:45,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:46:45,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:46:45,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:46:45,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:46:45,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:46:45,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:46:45,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:46:45,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:46:45,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:46:45,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:46:45,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:46:45,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:46:45,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:46:45,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:46:45,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:46:45,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:46:45,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:46:45,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:46:45,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:46:45,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:46:45,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:46:45,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:46:45,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:46:45,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:46:45,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:46:45,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:46:45,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:46:45,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:46:45,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:46:45,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:46:45,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:46:45,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:46:45,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:46:45,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:46:45,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:46:45,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:46:45,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:46:45,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:46:45,349 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:46:45,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:46:45,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:46:45,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:46:45,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:46:45,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:46:45,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:46:45,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:46:45,352 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:46:45,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:46:45,353 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:46:45,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:46:45,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:46:45,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:46:45,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:46:45,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:46:45,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:46:45,355 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:46:45,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:46:45,355 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:46:45,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:46:45,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:46:45,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:46:45,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:46:45,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:46:45,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:46:45,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:46:45,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:46:45,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:46:45,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:46:45,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:46:45,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:46:45,358 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:46:45,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:46:45,358 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:46:45,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:46:45,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:46:45,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:46:45,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:46:45,675 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:46:45,676 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:46:45,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 11:46:46,848 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:46:47,104 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:46:47,104 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 11:46:47,112 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58945ead/ae3e7ef91c264772ae898553892e0aff/FLAG71152024e [2023-09-01 11:46:47,136 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58945ead/ae3e7ef91c264772ae898553892e0aff [2023-09-01 11:46:47,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:46:47,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:46:47,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:46:47,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:46:47,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:46:47,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26519267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47, skipping insertion in model container [2023-09-01 11:46:47,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:46:47,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:46:47,374 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/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 11:46:47,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:46:47,399 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:46:47,435 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/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 11:46:47,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:46:47,461 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:46:47,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47 WrapperNode [2023-09-01 11:46:47,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:46:47,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:46:47,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:46:47,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:46:47,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,522 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 283 [2023-09-01 11:46:47,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:46:47,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:46:47,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:46:47,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:46:47,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,557 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:46:47,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:46:47,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:46:47,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:46:47,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (1/1) ... [2023-09-01 11:46:47,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:46:47,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:47,599 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) [2023-09-01 11:46:47,615 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 [2023-09-01 11:46:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:46:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:46:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:46:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:46:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:46:47,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:46:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:46:47,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:46:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 11:46:47,643 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 11:46:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:46:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:46:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:46:47,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:46:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:46:47,645 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:46:47,735 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:46:47,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:46:48,251 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:46:48,261 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:46:48,262 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 11:46:48,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:46:48 BoogieIcfgContainer [2023-09-01 11:46:48,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:46:48,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:46:48,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:46:48,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:46:48,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:46:47" (1/3) ... [2023-09-01 11:46:48,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbbf7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:46:48, skipping insertion in model container [2023-09-01 11:46:48,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:47" (2/3) ... [2023-09-01 11:46:48,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbbf7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:46:48, skipping insertion in model container [2023-09-01 11:46:48,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:46:48" (3/3) ... [2023-09-01 11:46:48,271 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-09-01 11:46:48,278 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:46:48,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:46:48,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:46:48,287 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:46:48,441 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:46:48,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 318 transitions, 660 flow [2023-09-01 11:46:48,671 INFO L130 PetriNetUnfolder]: 28/315 cut-off events. [2023-09-01 11:46:48,672 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:46:48,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 315 events. 28/315 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 504 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 245. Up to 3 conditions per place. [2023-09-01 11:46:48,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 318 transitions, 660 flow [2023-09-01 11:46:48,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 305 transitions, 628 flow [2023-09-01 11:46:48,695 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:46:48,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 305 transitions, 628 flow [2023-09-01 11:46:48,712 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 305 transitions, 628 flow [2023-09-01 11:46:48,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 305 transitions, 628 flow [2023-09-01 11:46:48,772 INFO L130 PetriNetUnfolder]: 28/305 cut-off events. [2023-09-01 11:46:48,773 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:46:48,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 305 events. 28/305 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 503 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 245. Up to 3 conditions per place. [2023-09-01 11:46:48,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-09-01 11:46:57,357 INFO L134 LiptonReduction]: Checked pairs total: 16298 [2023-09-01 11:46:57,358 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-09-01 11:46:57,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:46:57,375 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;@6b87dbf6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:46:57,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 11:46:57,382 INFO L130 PetriNetUnfolder]: 8/35 cut-off events. [2023-09-01 11:46:57,383 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:46:57,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:57,384 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] [2023-09-01 11:46:57,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:46:57,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash -917067574, now seen corresponding path program 1 times [2023-09-01 11:46:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:57,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403579564] [2023-09-01 11:46:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:58,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403579564] [2023-09-01 11:46:58,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403579564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:46:58,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:46:58,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:46:58,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955421555] [2023-09-01 11:46:58,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:46:58,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:46:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:46:58,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 654 [2023-09-01 11:46:58,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 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) [2023-09-01 11:46:58,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:58,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 654 [2023-09-01 11:46:58,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:58,815 INFO L130 PetriNetUnfolder]: 1848/2604 cut-off events. [2023-09-01 11:46:58,815 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-09-01 11:46:58,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5448 conditions, 2604 events. 1848/2604 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10381 event pairs, 646 based on Foata normal form. 1/1980 useless extension candidates. Maximal degree in co-relation 2528. Up to 1171 conditions per place. [2023-09-01 11:46:58,829 INFO L137 encePairwiseOnDemand]: 647/654 looper letters, 92 selfloop transitions, 6 changer transitions 4/102 dead transitions. [2023-09-01 11:46:58,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 102 transitions, 462 flow [2023-09-01 11:46:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:46:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:46:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1759 transitions. [2023-09-01 11:46:58,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44826707441386343 [2023-09-01 11:46:58,854 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1759 transitions. [2023-09-01 11:46:58,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1759 transitions. [2023-09-01 11:46:58,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:58,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1759 transitions. [2023-09-01 11:46:58,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 293.1666666666667) internal successors, (1759), 6 states have internal predecessors, (1759), 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) [2023-09-01 11:46:58,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 654.0) internal successors, (4578), 7 states have internal predecessors, (4578), 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) [2023-09-01 11:46:58,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 654.0) internal successors, (4578), 7 states have internal predecessors, (4578), 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) [2023-09-01 11:46:58,907 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 6 states and 1759 transitions. [2023-09-01 11:46:58,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 102 transitions, 462 flow [2023-09-01 11:46:58,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 102 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 11:46:58,917 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 117 flow [2023-09-01 11:46:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-09-01 11:46:58,923 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-09-01 11:46:58,924 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 117 flow [2023-09-01 11:46:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 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) [2023-09-01 11:46:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:58,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:46:58,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:46:58,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1395278390, now seen corresponding path program 1 times [2023-09-01 11:46:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862019773] [2023-09-01 11:46:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:58,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:59,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862019773] [2023-09-01 11:46:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862019773] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779539352] [2023-09-01 11:46:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:59,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:46:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:59,209 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) [2023-09-01 11:46:59,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:46:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:59,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 11:46:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:46:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:59,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:46:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:59,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779539352] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:59,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:46:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 13 [2023-09-01 11:46:59,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177049445] [2023-09-01 11:46:59,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:59,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:46:59,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:46:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 11:46:59,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 654 [2023-09-01 11:46:59,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 270.8333333333333) internal successors, (1625), 6 states have internal predecessors, (1625), 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) [2023-09-01 11:46:59,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:59,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 654 [2023-09-01 11:46:59,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:00,585 INFO L130 PetriNetUnfolder]: 3853/5458 cut-off events. [2023-09-01 11:47:00,585 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2023-09-01 11:47:00,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11824 conditions, 5458 events. 3853/5458 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26177 event pairs, 744 based on Foata normal form. 1/4159 useless extension candidates. Maximal degree in co-relation 5912. Up to 2332 conditions per place. [2023-09-01 11:47:00,608 INFO L137 encePairwiseOnDemand]: 644/654 looper letters, 141 selfloop transitions, 11 changer transitions 8/160 dead transitions. [2023-09-01 11:47:00,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 160 transitions, 748 flow [2023-09-01 11:47:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:47:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:47:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2825 transitions. [2023-09-01 11:47:00,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319571865443425 [2023-09-01 11:47:00,616 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2825 transitions. [2023-09-01 11:47:00,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2825 transitions. [2023-09-01 11:47:00,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:00,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2825 transitions. [2023-09-01 11:47:00,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.5) internal successors, (2825), 10 states have internal predecessors, (2825), 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) [2023-09-01 11:47:00,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 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) [2023-09-01 11:47:00,637 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 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) [2023-09-01 11:47:00,638 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 117 flow. Second operand 10 states and 2825 transitions. [2023-09-01 11:47:00,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 160 transitions, 748 flow [2023-09-01 11:47:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 160 transitions, 739 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:00,643 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 196 flow [2023-09-01 11:47:00,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-09-01 11:47:00,644 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-09-01 11:47:00,645 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 196 flow [2023-09-01 11:47:00,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 270.8333333333333) internal successors, (1625), 6 states have internal predecessors, (1625), 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) [2023-09-01 11:47:00,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:00,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:00,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:47:00,851 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 [2023-09-01 11:47:00,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:00,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1072286339, now seen corresponding path program 1 times [2023-09-01 11:47:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:00,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971135464] [2023-09-01 11:47:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:00,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:01,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:01,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971135464] [2023-09-01 11:47:01,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971135464] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:01,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344893987] [2023-09-01 11:47:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:01,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:01,097 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) [2023-09-01 11:47:01,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:47:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:47:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:01,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344893987] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:01,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:47:01,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-09-01 11:47:01,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002821603] [2023-09-01 11:47:01,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:47:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:47:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-09-01 11:47:01,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 654 [2023-09-01 11:47:01,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 269.42857142857144) internal successors, (1886), 7 states have internal predecessors, (1886), 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) [2023-09-01 11:47:01,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:01,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 654 [2023-09-01 11:47:01,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:02,780 INFO L130 PetriNetUnfolder]: 5619/8120 cut-off events. [2023-09-01 11:47:02,780 INFO L131 PetriNetUnfolder]: For 902/902 co-relation queries the response was YES. [2023-09-01 11:47:02,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 8120 events. 5619/8120 cut-off events. For 902/902 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 42062 event pairs, 1656 based on Foata normal form. 0/6236 useless extension candidates. Maximal degree in co-relation 11716. Up to 2674 conditions per place. [2023-09-01 11:47:02,821 INFO L137 encePairwiseOnDemand]: 644/654 looper letters, 161 selfloop transitions, 17 changer transitions 2/180 dead transitions. [2023-09-01 11:47:02,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 180 transitions, 910 flow [2023-09-01 11:47:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:47:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:47:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2829 transitions. [2023-09-01 11:47:02,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325688073394495 [2023-09-01 11:47:02,829 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2829 transitions. [2023-09-01 11:47:02,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2829 transitions. [2023-09-01 11:47:02,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:02,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2829 transitions. [2023-09-01 11:47:02,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.9) internal successors, (2829), 10 states have internal predecessors, (2829), 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) [2023-09-01 11:47:02,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 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) [2023-09-01 11:47:02,852 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 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) [2023-09-01 11:47:02,852 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 196 flow. Second operand 10 states and 2829 transitions. [2023-09-01 11:47:02,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 180 transitions, 910 flow [2023-09-01 11:47:02,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 180 transitions, 909 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:02,860 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 266 flow [2023-09-01 11:47:02,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=266, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-09-01 11:47:02,862 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-09-01 11:47:02,862 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 266 flow [2023-09-01 11:47:02,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 269.42857142857144) internal successors, (1886), 7 states have internal predecessors, (1886), 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) [2023-09-01 11:47:02,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:02,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:02,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:03,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:47:03,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:03,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -885160629, now seen corresponding path program 1 times [2023-09-01 11:47:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750547786] [2023-09-01 11:47:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:03,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:03,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750547786] [2023-09-01 11:47:03,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750547786] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:03,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:47:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705806977] [2023-09-01 11:47:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:47:03,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 654 [2023-09-01 11:47:03,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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) [2023-09-01 11:47:03,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:03,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 654 [2023-09-01 11:47:03,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:04,000 INFO L130 PetriNetUnfolder]: 3495/5132 cut-off events. [2023-09-01 11:47:04,001 INFO L131 PetriNetUnfolder]: For 1807/1807 co-relation queries the response was YES. [2023-09-01 11:47:04,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12286 conditions, 5132 events. 3495/5132 cut-off events. For 1807/1807 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24773 event pairs, 1802 based on Foata normal form. 0/4432 useless extension candidates. Maximal degree in co-relation 7166. Up to 3137 conditions per place. [2023-09-01 11:47:04,027 INFO L137 encePairwiseOnDemand]: 649/654 looper letters, 42 selfloop transitions, 4 changer transitions 51/97 dead transitions. [2023-09-01 11:47:04,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 572 flow [2023-09-01 11:47:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1454 transitions. [2023-09-01 11:47:04,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44464831804281346 [2023-09-01 11:47:04,032 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1454 transitions. [2023-09-01 11:47:04,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1454 transitions. [2023-09-01 11:47:04,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:04,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1454 transitions. [2023-09-01 11:47:04,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 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) [2023-09-01 11:47:04,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 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) [2023-09-01 11:47:04,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 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) [2023-09-01 11:47:04,041 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 266 flow. Second operand 5 states and 1454 transitions. [2023-09-01 11:47:04,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 572 flow [2023-09-01 11:47:04,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 558 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:04,053 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 195 flow [2023-09-01 11:47:04,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-09-01 11:47:04,054 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-09-01 11:47:04,055 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 195 flow [2023-09-01 11:47:04,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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) [2023-09-01 11:47:04,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:04,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:04,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:47:04,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:04,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1196564902, now seen corresponding path program 1 times [2023-09-01 11:47:04,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:04,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309951510] [2023-09-01 11:47:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:04,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:04,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309951510] [2023-09-01 11:47:04,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309951510] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:04,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:04,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:47:04,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957470300] [2023-09-01 11:47:04,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:04,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:47:04,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 654 [2023-09-01 11:47:04,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 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) [2023-09-01 11:47:04,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:04,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 654 [2023-09-01 11:47:04,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:04,651 INFO L130 PetriNetUnfolder]: 1573/2264 cut-off events. [2023-09-01 11:47:04,651 INFO L131 PetriNetUnfolder]: For 998/998 co-relation queries the response was YES. [2023-09-01 11:47:04,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5468 conditions, 2264 events. 1573/2264 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8876 event pairs, 882 based on Foata normal form. 50/2032 useless extension candidates. Maximal degree in co-relation 5448. Up to 1658 conditions per place. [2023-09-01 11:47:04,661 INFO L137 encePairwiseOnDemand]: 649/654 looper letters, 37 selfloop transitions, 2 changer transitions 44/83 dead transitions. [2023-09-01 11:47:04,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 452 flow [2023-09-01 11:47:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2023-09-01 11:47:04,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452599388379205 [2023-09-01 11:47:04,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2023-09-01 11:47:04,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2023-09-01 11:47:04,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:04,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2023-09-01 11:47:04,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 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) [2023-09-01 11:47:04,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 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) [2023-09-01 11:47:04,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 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) [2023-09-01 11:47:04,674 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 195 flow. Second operand 5 states and 1456 transitions. [2023-09-01 11:47:04,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 452 flow [2023-09-01 11:47:04,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 403 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-09-01 11:47:04,677 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 126 flow [2023-09-01 11:47:04,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-09-01 11:47:04,678 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-09-01 11:47:04,678 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 126 flow [2023-09-01 11:47:04,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 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) [2023-09-01 11:47:04,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:04,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:04,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:47:04,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:04,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1703835318, now seen corresponding path program 1 times [2023-09-01 11:47:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:04,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678673618] [2023-09-01 11:47:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:04,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:47:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678673618] [2023-09-01 11:47:05,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678673618] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686915604] [2023-09-01 11:47:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:05,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:05,041 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) [2023-09-01 11:47:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:47:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 11:47:05,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:05,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686915604] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:05,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:05,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2023-09-01 11:47:05,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378376650] [2023-09-01 11:47:05,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:47:05,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:47:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:47:06,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 654 [2023-09-01 11:47:06,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 126 flow. Second operand has 18 states, 18 states have (on average 263.3333333333333) internal successors, (4740), 18 states have internal predecessors, (4740), 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) [2023-09-01 11:47:06,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:06,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 654 [2023-09-01 11:47:06,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:08,200 INFO L130 PetriNetUnfolder]: 5562/8013 cut-off events. [2023-09-01 11:47:08,200 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-09-01 11:47:08,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18100 conditions, 8013 events. 5562/8013 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 40995 event pairs, 1689 based on Foata normal form. 6/6885 useless extension candidates. Maximal degree in co-relation 18083. Up to 1524 conditions per place. [2023-09-01 11:47:08,231 INFO L137 encePairwiseOnDemand]: 642/654 looper letters, 137 selfloop transitions, 16 changer transitions 163/316 dead transitions. [2023-09-01 11:47:08,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 316 transitions, 1483 flow [2023-09-01 11:47:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 11:47:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 11:47:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6817 transitions. [2023-09-01 11:47:08,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41694189602446485 [2023-09-01 11:47:08,248 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6817 transitions. [2023-09-01 11:47:08,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6817 transitions. [2023-09-01 11:47:08,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:08,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6817 transitions. [2023-09-01 11:47:08,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 272.68) internal successors, (6817), 25 states have internal predecessors, (6817), 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) [2023-09-01 11:47:08,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 654.0) internal successors, (17004), 26 states have internal predecessors, (17004), 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) [2023-09-01 11:47:08,310 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 654.0) internal successors, (17004), 26 states have internal predecessors, (17004), 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) [2023-09-01 11:47:08,310 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 126 flow. Second operand 25 states and 6817 transitions. [2023-09-01 11:47:08,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 316 transitions, 1483 flow [2023-09-01 11:47:08,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 316 transitions, 1444 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-09-01 11:47:08,320 INFO L231 Difference]: Finished difference. Result has 78 places, 52 transitions, 240 flow [2023-09-01 11:47:08,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=240, PETRI_PLACES=78, PETRI_TRANSITIONS=52} [2023-09-01 11:47:08,322 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2023-09-01 11:47:08,323 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 52 transitions, 240 flow [2023-09-01 11:47:08,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 263.3333333333333) internal successors, (4740), 18 states have internal predecessors, (4740), 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) [2023-09-01 11:47:08,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:08,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:08,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 11:47:08,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:08,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:08,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:08,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1693095200, now seen corresponding path program 1 times [2023-09-01 11:47:08,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735556495] [2023-09-01 11:47:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735556495] [2023-09-01 11:47:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735556495] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:08,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811693605] [2023-09-01 11:47:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:08,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:08,756 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) [2023-09-01 11:47:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:47:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:47:08,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:08,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:09,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811693605] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:09,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:47:09,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2023-09-01 11:47:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019902242] [2023-09-01 11:47:09,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:47:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:47:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:47:09,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 654 [2023-09-01 11:47:09,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 52 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 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) [2023-09-01 11:47:09,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:09,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 654 [2023-09-01 11:47:09,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:09,900 INFO L130 PetriNetUnfolder]: 4352/6331 cut-off events. [2023-09-01 11:47:09,901 INFO L131 PetriNetUnfolder]: For 13601/13601 co-relation queries the response was YES. [2023-09-01 11:47:09,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19251 conditions, 6331 events. 4352/6331 cut-off events. For 13601/13601 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 31465 event pairs, 1173 based on Foata normal form. 0/5874 useless extension candidates. Maximal degree in co-relation 16152. Up to 4090 conditions per place. [2023-09-01 11:47:09,938 INFO L137 encePairwiseOnDemand]: 646/654 looper letters, 65 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-09-01 11:47:09,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 505 flow [2023-09-01 11:47:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:47:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:47:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1921 transitions. [2023-09-01 11:47:09,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196155526430756 [2023-09-01 11:47:09,944 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1921 transitions. [2023-09-01 11:47:09,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1921 transitions. [2023-09-01 11:47:09,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:09,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1921 transitions. [2023-09-01 11:47:09,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 274.42857142857144) internal successors, (1921), 7 states have internal predecessors, (1921), 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) [2023-09-01 11:47:09,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 654.0) internal successors, (5232), 8 states have internal predecessors, (5232), 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) [2023-09-01 11:47:09,954 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 654.0) internal successors, (5232), 8 states have internal predecessors, (5232), 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) [2023-09-01 11:47:09,954 INFO L175 Difference]: Start difference. First operand has 78 places, 52 transitions, 240 flow. Second operand 7 states and 1921 transitions. [2023-09-01 11:47:09,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 505 flow [2023-09-01 11:47:09,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 451 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-09-01 11:47:09,999 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 240 flow [2023-09-01 11:47:09,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-09-01 11:47:10,000 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-09-01 11:47:10,000 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 240 flow [2023-09-01 11:47:10,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 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) [2023-09-01 11:47:10,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:10,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:10,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:10,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:10,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:10,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 975190112, now seen corresponding path program 1 times [2023-09-01 11:47:10,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:10,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080601644] [2023-09-01 11:47:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:10,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:47:10,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:10,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080601644] [2023-09-01 11:47:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080601644] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:10,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295198859] [2023-09-01 11:47:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:10,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:10,457 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) [2023-09-01 11:47:10,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:47:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 11:47:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:47:10,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:47:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295198859] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:10,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 11:47:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982301383] [2023-09-01 11:47:10,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:10,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 11:47:10,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 11:47:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:47:11,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 654 [2023-09-01 11:47:11,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 240 flow. Second operand has 14 states, 14 states have (on average 270.2857142857143) internal successors, (3784), 14 states have internal predecessors, (3784), 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) [2023-09-01 11:47:11,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:11,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 654 [2023-09-01 11:47:11,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:12,736 INFO L130 PetriNetUnfolder]: 10150/14755 cut-off events. [2023-09-01 11:47:12,736 INFO L131 PetriNetUnfolder]: For 13466/13466 co-relation queries the response was YES. [2023-09-01 11:47:12,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41872 conditions, 14755 events. 10150/14755 cut-off events. For 13466/13466 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 82381 event pairs, 4193 based on Foata normal form. 6/14759 useless extension candidates. Maximal degree in co-relation 29773. Up to 5684 conditions per place. [2023-09-01 11:47:12,838 INFO L137 encePairwiseOnDemand]: 645/654 looper letters, 167 selfloop transitions, 18 changer transitions 8/193 dead transitions. [2023-09-01 11:47:12,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 193 transitions, 1189 flow [2023-09-01 11:47:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:47:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:47:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3359 transitions. [2023-09-01 11:47:12,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42800713557594294 [2023-09-01 11:47:12,847 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3359 transitions. [2023-09-01 11:47:12,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3359 transitions. [2023-09-01 11:47:12,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:12,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3359 transitions. [2023-09-01 11:47:12,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 279.9166666666667) internal successors, (3359), 12 states have internal predecessors, (3359), 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) [2023-09-01 11:47:12,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 654.0) internal successors, (8502), 13 states have internal predecessors, (8502), 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) [2023-09-01 11:47:12,865 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 654.0) internal successors, (8502), 13 states have internal predecessors, (8502), 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) [2023-09-01 11:47:12,865 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 240 flow. Second operand 12 states and 3359 transitions. [2023-09-01 11:47:12,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 193 transitions, 1189 flow [2023-09-01 11:47:12,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 193 transitions, 1166 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:12,880 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 375 flow [2023-09-01 11:47:12,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=375, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-09-01 11:47:12,883 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2023-09-01 11:47:12,883 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 375 flow [2023-09-01 11:47:12,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 270.2857142857143) internal successors, (3784), 14 states have internal predecessors, (3784), 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) [2023-09-01 11:47:12,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:12,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:12,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:13,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:13,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:13,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:13,098 INFO L85 PathProgramCache]: Analyzing trace with hash 241561077, now seen corresponding path program 1 times [2023-09-01 11:47:13,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:13,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258763012] [2023-09-01 11:47:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:13,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:14,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:14,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258763012] [2023-09-01 11:47:14,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258763012] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:14,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054206129] [2023-09-01 11:47:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:14,370 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) [2023-09-01 11:47:14,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:47:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:14,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 62 conjunts are in the unsatisfiable core [2023-09-01 11:47:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:14,757 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 [2023-09-01 11:47:14,824 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 [2023-09-01 11:47:14,943 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 [2023-09-01 11:47:15,045 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 [2023-09-01 11:47:15,621 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-09-01 11:47:15,622 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 52 treesize of output 40 [2023-09-01 11:47:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:15,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:16,886 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (let ((.cse2 (+ .cse10 c_~a1~0.offset)) (.cse4 (+ .cse10 c_~a2~0.offset))) (let ((.cse0 (forall ((v_ArrVal_427 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse9 (select .cse8 ~a2~0.base))) (or (< (select (select .cse8 ~a1~0.base) .cse2) (+ (select .cse9 .cse4) 1)) (< (select .cse9 c_~a2~0.offset) (+ (select (select .cse8 c_~a3~0.base) c_~a3~0.offset) 1)))))))) (and (or (< 0 c_~n1~0) .cse0) (or .cse0 (< 0 c_~n3~0)) (forall ((v_ArrVal_427 (Array Int Int)) (~a2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse3 (select .cse7 ~a2~0.base)) (.cse6 (select (select .cse7 c_~a3~0.base) c_~a3~0.offset))) (or (forall ((~a1~0.base Int)) (let ((.cse1 (select .cse7 ~a1~0.base))) (let ((.cse5 (select .cse1 c_~a1~0.offset))) (or (< (select .cse1 .cse2) (+ (select .cse3 .cse4) 1)) (< (+ .cse5 2147483648) .cse6) (< .cse6 .cse5) (= .cse5 .cse6))))) (< (select .cse3 c_~a2~0.offset) (+ .cse6 1)))))))))) is different from false [2023-09-01 11:47:17,097 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (let ((.cse3 (+ .cse10 c_~a1~0.offset)) (.cse5 (+ .cse10 c_~a2~0.offset))) (let ((.cse7 (forall ((v_ArrVal_427 (Array Int Int)) (v_ArrVal_426 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse8 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse9 (select .cse8 ~a2~0.base))) (or (< (select (select .cse8 ~a1~0.base) .cse3) (+ (select .cse9 .cse5) 1)) (< (select .cse9 c_~a2~0.offset) (+ (select (select .cse8 c_~a3~0.base) c_~a3~0.offset) 1)))))))) (and (forall ((v_ArrVal_427 (Array Int Int)) (v_ArrVal_426 (Array Int Int)) (~a2~0.base Int)) (let ((.cse6 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse4 (select .cse6 ~a2~0.base)) (.cse0 (select (select .cse6 c_~a3~0.base) c_~a3~0.offset))) (or (forall ((~a1~0.base Int)) (let ((.cse2 (select .cse6 ~a1~0.base))) (let ((.cse1 (select .cse2 c_~a1~0.offset))) (or (< .cse0 .cse1) (< (+ .cse1 2147483648) .cse0) (< (select .cse2 .cse3) (+ (select .cse4 .cse5) 1)) (= .cse1 .cse0))))) (< (select .cse4 c_~a2~0.offset) (+ .cse0 1)))))) (or .cse7 (< 0 c_~n3~0)) (or .cse7 (< 0 c_~n1~0)))))) is different from false [2023-09-01 11:47:17,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:17,362 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 111 treesize of output 75 [2023-09-01 11:47:17,405 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-09-01 11:47:17,405 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 4971 treesize of output 4736 [2023-09-01 11:47:17,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:17,655 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 2347 treesize of output 2115 [2023-09-01 11:47:17,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:17,730 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 2091 treesize of output 1987 [2023-09-01 11:47:17,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:17,810 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 1963 treesize of output 1923 [2023-09-01 11:48:27,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:27,209 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 111 treesize of output 75 [2023-09-01 11:48:27,268 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-09-01 11:48:27,269 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 29931 treesize of output 28416 [2023-09-01 11:48:27,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:27,625 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 2347 treesize of output 2115 [2023-09-01 11:48:27,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:27,684 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 2091 treesize of output 2051 [2023-09-01 11:48:27,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:27,744 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 2027 treesize of output 1923 [2023-09-01 11:50:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:50:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054206129] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:31,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:31,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-09-01 11:50:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93530732] [2023-09-01 11:50:31,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 11:50:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 11:50:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1423, Unknown=13, NotChecked=158, Total=1806 [2023-09-01 11:50:32,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 654 [2023-09-01 11:50:32,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 375 flow. Second operand has 43 states, 43 states have (on average 183.06976744186048) internal successors, (7872), 43 states have internal predecessors, (7872), 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) [2023-09-01 11:50:32,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:32,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 654 [2023-09-01 11:50:32,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:38,719 INFO L130 PetriNetUnfolder]: 22407/33056 cut-off events. [2023-09-01 11:50:38,720 INFO L131 PetriNetUnfolder]: For 23840/23840 co-relation queries the response was YES. [2023-09-01 11:50:38,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91731 conditions, 33056 events. 22407/33056 cut-off events. For 23840/23840 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 215167 event pairs, 5202 based on Foata normal form. 14/33070 useless extension candidates. Maximal degree in co-relation 65222. Up to 13419 conditions per place. [2023-09-01 11:50:38,998 INFO L137 encePairwiseOnDemand]: 635/654 looper letters, 214 selfloop transitions, 64 changer transitions 28/306 dead transitions. [2023-09-01 11:50:38,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 306 transitions, 1830 flow [2023-09-01 11:50:38,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 11:50:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 11:50:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5130 transitions. [2023-09-01 11:50:39,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.290519877675841 [2023-09-01 11:50:39,013 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5130 transitions. [2023-09-01 11:50:39,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5130 transitions. [2023-09-01 11:50:39,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:39,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5130 transitions. [2023-09-01 11:50:39,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 190.0) internal successors, (5130), 27 states have internal predecessors, (5130), 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) [2023-09-01 11:50:39,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 654.0) internal successors, (18312), 28 states have internal predecessors, (18312), 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) [2023-09-01 11:50:39,042 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 654.0) internal successors, (18312), 28 states have internal predecessors, (18312), 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) [2023-09-01 11:50:39,043 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 375 flow. Second operand 27 states and 5130 transitions. [2023-09-01 11:50:39,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 306 transitions, 1830 flow [2023-09-01 11:50:39,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 306 transitions, 1817 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 11:50:39,073 INFO L231 Difference]: Finished difference. Result has 122 places, 115 transitions, 845 flow [2023-09-01 11:50:39,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=845, PETRI_PLACES=122, PETRI_TRANSITIONS=115} [2023-09-01 11:50:39,074 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-09-01 11:50:39,075 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 115 transitions, 845 flow [2023-09-01 11:50:39,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 183.06976744186048) internal successors, (7872), 43 states have internal predecessors, (7872), 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) [2023-09-01 11:50:39,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:39,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:39,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:39,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:50:39,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1846702689, now seen corresponding path program 2 times [2023-09-01 11:50:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:39,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750535936] [2023-09-01 11:50:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:50:40,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:40,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750535936] [2023-09-01 11:50:40,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750535936] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:40,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669606414] [2023-09-01 11:50:40,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:50:40,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:40,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:40,432 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) [2023-09-01 11:50:40,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:50:40,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:50:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:50:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:41,358 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-09-01 11:50:41,359 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 52 treesize of output 40 [2023-09-01 11:50:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:50:41,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:50:41,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669606414] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:41,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:50:41,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 28 [2023-09-01 11:50:41,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190520985] [2023-09-01 11:50:41,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:50:41,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:50:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:50:42,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 654 [2023-09-01 11:50:42,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 115 transitions, 845 flow. Second operand has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 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) [2023-09-01 11:50:42,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:42,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 654 [2023-09-01 11:50:42,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:47,828 INFO L130 PetriNetUnfolder]: 27720/41392 cut-off events. [2023-09-01 11:50:47,828 INFO L131 PetriNetUnfolder]: For 150331/150331 co-relation queries the response was YES. [2023-09-01 11:50:48,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167274 conditions, 41392 events. 27720/41392 cut-off events. For 150331/150331 co-relation queries the response was YES. Maximal size of possible extension queue 1462. Compared 288638 event pairs, 7145 based on Foata normal form. 7/41399 useless extension candidates. Maximal degree in co-relation 166493. Up to 13495 conditions per place. [2023-09-01 11:50:48,164 INFO L137 encePairwiseOnDemand]: 637/654 looper letters, 227 selfloop transitions, 33 changer transitions 14/274 dead transitions. [2023-09-01 11:50:48,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 274 transitions, 2378 flow [2023-09-01 11:50:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:50:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:50:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3387 transitions. [2023-09-01 11:50:48,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39837685250529287 [2023-09-01 11:50:48,171 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3387 transitions. [2023-09-01 11:50:48,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3387 transitions. [2023-09-01 11:50:48,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:48,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3387 transitions. [2023-09-01 11:50:48,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 260.53846153846155) internal successors, (3387), 13 states have internal predecessors, (3387), 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) [2023-09-01 11:50:48,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 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) [2023-09-01 11:50:48,183 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 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) [2023-09-01 11:50:48,183 INFO L175 Difference]: Start difference. First operand has 122 places, 115 transitions, 845 flow. Second operand 13 states and 3387 transitions. [2023-09-01 11:50:48,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 274 transitions, 2378 flow [2023-09-01 11:50:48,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 274 transitions, 2222 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-09-01 11:50:48,776 INFO L231 Difference]: Finished difference. Result has 130 places, 131 transitions, 1047 flow [2023-09-01 11:50:48,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1047, PETRI_PLACES=130, PETRI_TRANSITIONS=131} [2023-09-01 11:50:48,777 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-09-01 11:50:48,777 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 131 transitions, 1047 flow [2023-09-01 11:50:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 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) [2023-09-01 11:50:48,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:48,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:48,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 11:50:48,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:48,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:50:48,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 801462021, now seen corresponding path program 3 times [2023-09-01 11:50:48,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:48,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269740375] [2023-09-01 11:50:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:48,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:50:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269740375] [2023-09-01 11:50:50,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269740375] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:50,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262012293] [2023-09-01 11:50:50,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:50:50,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:50,109 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) [2023-09-01 11:50:50,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:50:50,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:50:50,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:50,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 11:50:50,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:51,145 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-09-01 11:50:51,146 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 52 treesize of output 40 [2023-09-01 11:50:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:50:51,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:50:51,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262012293] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:51,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:50:51,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 28 [2023-09-01 11:50:51,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18638884] [2023-09-01 11:50:51,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:51,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:50:51,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:51,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:50:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:50:52,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 654 [2023-09-01 11:50:52,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 131 transitions, 1047 flow. Second operand has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 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) [2023-09-01 11:50:52,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:52,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 654 [2023-09-01 11:50:52,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:59,476 INFO L130 PetriNetUnfolder]: 37219/55811 cut-off events. [2023-09-01 11:50:59,476 INFO L131 PetriNetUnfolder]: For 288919/288919 co-relation queries the response was YES. [2023-09-01 11:50:59,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257529 conditions, 55811 events. 37219/55811 cut-off events. For 288919/288919 co-relation queries the response was YES. Maximal size of possible extension queue 2086. Compared 409290 event pairs, 10693 based on Foata normal form. 7/55818 useless extension candidates. Maximal degree in co-relation 256402. Up to 25171 conditions per place. [2023-09-01 11:51:00,160 INFO L137 encePairwiseOnDemand]: 639/654 looper letters, 266 selfloop transitions, 44 changer transitions 12/322 dead transitions. [2023-09-01 11:51:00,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 322 transitions, 3162 flow [2023-09-01 11:51:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:51:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:51:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3378 transitions. [2023-09-01 11:51:00,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39731827805222303 [2023-09-01 11:51:00,166 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3378 transitions. [2023-09-01 11:51:00,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3378 transitions. [2023-09-01 11:51:00,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:00,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3378 transitions. [2023-09-01 11:51:00,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 259.84615384615387) internal successors, (3378), 13 states have internal predecessors, (3378), 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) [2023-09-01 11:51:00,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 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) [2023-09-01 11:51:00,177 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 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) [2023-09-01 11:51:00,177 INFO L175 Difference]: Start difference. First operand has 130 places, 131 transitions, 1047 flow. Second operand 13 states and 3378 transitions. [2023-09-01 11:51:00,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 322 transitions, 3162 flow [2023-09-01 11:51:04,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 322 transitions, 3056 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-09-01 11:51:04,204 INFO L231 Difference]: Finished difference. Result has 145 places, 157 transitions, 1429 flow [2023-09-01 11:51:04,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1429, PETRI_PLACES=145, PETRI_TRANSITIONS=157} [2023-09-01 11:51:04,205 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2023-09-01 11:51:04,205 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 157 transitions, 1429 flow [2023-09-01 11:51:04,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 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) [2023-09-01 11:51:04,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:04,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:04,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:04,406 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,SelfDestructingSolverStorable10 [2023-09-01 11:51:04,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:51:04,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash 785158062, now seen corresponding path program 1 times [2023-09-01 11:51:04,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:04,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963859763] [2023-09-01 11:51:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:04,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:51:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:05,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963859763] [2023-09-01 11:51:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963859763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:05,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938466854] [2023-09-01 11:51:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:05,297 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) [2023-09-01 11:51:05,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:51:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:05,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 68 conjunts are in the unsatisfiable core [2023-09-01 11:51:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:05,679 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 11 treesize of output 7 [2023-09-01 11:51:05,738 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 [2023-09-01 11:51:05,931 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 [2023-09-01 11:51:05,990 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 [2023-09-01 11:51:06,645 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-09-01 11:51:06,645 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 100 treesize of output 64 [2023-09-01 11:51:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:51:06,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:08,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:08,015 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 109 treesize of output 73 [2023-09-01 11:51:08,057 INFO L321 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2023-09-01 11:51:08,058 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 9451 treesize of output 8964 [2023-09-01 11:51:08,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:08,529 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 2219 treesize of output 2179 [2023-09-01 11:51:08,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:08,597 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 2155 treesize of output 2051 [2023-09-01 11:51:08,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:08,683 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 2027 treesize of output 1795 [2023-09-01 11:51:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:51:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938466854] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:31,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:31,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 46 [2023-09-01 11:51:31,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983171023] [2023-09-01 11:51:31,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:31,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 11:51:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 11:51:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1849, Unknown=8, NotChecked=0, Total=2256 [2023-09-01 11:51:35,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 654 [2023-09-01 11:51:35,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 157 transitions, 1429 flow. Second operand has 48 states, 48 states have (on average 182.875) internal successors, (8778), 48 states have internal predecessors, (8778), 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) [2023-09-01 11:51:35,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:35,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 654 [2023-09-01 11:51:35,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:57,322 INFO L130 PetriNetUnfolder]: 45607/69348 cut-off events. [2023-09-01 11:51:57,323 INFO L131 PetriNetUnfolder]: For 443693/443693 co-relation queries the response was YES. [2023-09-01 11:51:57,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343103 conditions, 69348 events. 45607/69348 cut-off events. For 443693/443693 co-relation queries the response was YES. Maximal size of possible extension queue 2389. Compared 525509 event pairs, 12600 based on Foata normal form. 40/69388 useless extension candidates. Maximal degree in co-relation 341485. Up to 15983 conditions per place. [2023-09-01 11:51:58,223 INFO L137 encePairwiseOnDemand]: 634/654 looper letters, 1085 selfloop transitions, 231 changer transitions 108/1424 dead transitions. [2023-09-01 11:51:58,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1424 transitions, 13675 flow [2023-09-01 11:51:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-09-01 11:51:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-09-01 11:51:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 17488 transitions. [2023-09-01 11:51:58,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2938468259569177 [2023-09-01 11:51:58,251 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 17488 transitions. [2023-09-01 11:51:58,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 17488 transitions. [2023-09-01 11:51:58,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:58,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 17488 transitions. [2023-09-01 11:51:58,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 192.17582417582418) internal successors, (17488), 91 states have internal predecessors, (17488), 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) [2023-09-01 11:51:58,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 654.0) internal successors, (60168), 92 states have internal predecessors, (60168), 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) [2023-09-01 11:51:58,346 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 654.0) internal successors, (60168), 92 states have internal predecessors, (60168), 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) [2023-09-01 11:51:58,347 INFO L175 Difference]: Start difference. First operand has 145 places, 157 transitions, 1429 flow. Second operand 91 states and 17488 transitions. [2023-09-01 11:51:58,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1424 transitions, 13675 flow [2023-09-01 11:52:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1424 transitions, 12765 flow, removed 433 selfloop flow, removed 5 redundant places. [2023-09-01 11:52:04,847 INFO L231 Difference]: Finished difference. Result has 287 places, 354 transitions, 4125 flow [2023-09-01 11:52:04,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=4125, PETRI_PLACES=287, PETRI_TRANSITIONS=354} [2023-09-01 11:52:04,848 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 249 predicate places. [2023-09-01 11:52:04,848 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 354 transitions, 4125 flow [2023-09-01 11:52:04,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 182.875) internal successors, (8778), 48 states have internal predecessors, (8778), 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) [2023-09-01 11:52:04,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:52:04,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:52:04,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:52:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:52:05,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:52:05,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:52:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1816406924, now seen corresponding path program 2 times [2023-09-01 11:52:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:52:05,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014047488] [2023-09-01 11:52:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:52:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:52:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:52:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:52:05,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:52:05,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014047488] [2023-09-01 11:52:05,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014047488] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:52:05,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126597685] [2023-09-01 11:52:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:52:05,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:52:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:52:05,969 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) [2023-09-01 11:52:05,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:52:06,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:52:06,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:52:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:52:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:52:06,688 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:52:06,688 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 89 treesize of output 45 [2023-09-01 11:52:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 11:52:06,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:52:08,052 INFO L321 Elim1Store]: treesize reduction 44, result has 93.0 percent of original size [2023-09-01 11:52:08,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 153 treesize of output 633 Killed by 15