./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.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/popl20-more-max-array.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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --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 13:53:31,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:53:31,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:53:31,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:53:31,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:53:31,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:53:31,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:53:31,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:53:31,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:53:31,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:53:31,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:53:31,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:53:31,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:53:31,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:53:31,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:53:31,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:53:31,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:53:31,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:53:31,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:53:31,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:53:31,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:53:31,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:53:31,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:53:31,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:53:31,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:53:31,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:53:31,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:53:31,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:53:31,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:53:31,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:53:31,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:53:31,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:53:31,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:53:31,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:53:31,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:53:31,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:53:31,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:53:31,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:53:31,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:53:31,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:53:31,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:53:31,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:53:31,385 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:53:31,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:53:31,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:53:31,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:53:31,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:53:31,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:53:31,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:53:31,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:53:31,388 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:53:31,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:53:31,389 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:53:31,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:53:31,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:53:31,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:53:31,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:53:31,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:53:31,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:53:31,391 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:53:31,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:53:31,391 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:53:31,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:53:31,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:53:31,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:53:31,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:53:31,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:53:31,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:53:31,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:53:31,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:53:31,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:53:31,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:53:31,393 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:53:31,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:53:31,394 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:53:31,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:53:31,394 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:53:31,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:53:31,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:53:31,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:53:31,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:53:31,720 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:53:31,720 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:53:31,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-09-01 13:53:32,917 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:53:33,084 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:53:33,085 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-09-01 13:53:33,095 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d72e2b2/4eea2a4c53a14273afcd1a19b1e822a0/FLAG968726fc4 [2023-09-01 13:53:33,118 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d72e2b2/4eea2a4c53a14273afcd1a19b1e822a0 [2023-09-01 13:53:33,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:53:33,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:53:33,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:53:33,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:53:33,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:53:33,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526f537a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33, skipping insertion in model container [2023-09-01 13:53:33,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:53:33,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:53:33,324 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-09-01 13:53:33,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:53:33,346 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:53:33,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-09-01 13:53:33,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:53:33,394 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:53:33,396 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:53:33,402 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:53:33,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33 WrapperNode [2023-09-01 13:53:33,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:53:33,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:53:33,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:53:33,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:53:33,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,454 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-09-01 13:53:33,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:53:33,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:53:33,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:53:33,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:53:33,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,498 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:53:33,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:53:33,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:53:33,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:53:33,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (1/1) ... [2023-09-01 13:53:33,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:53:33,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:33,538 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 13:53:33,555 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 13:53:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:53:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:53:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:53:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:53:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:53:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:53:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:53:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:53:33,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:53:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:53:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:53:33,583 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 13:53:33,691 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:53:33,693 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:53:33,999 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:53:34,078 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:53:34,082 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:53:34,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:53:34 BoogieIcfgContainer [2023-09-01 13:53:34,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:53:34,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:53:34,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:53:34,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:53:34,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:53:33" (1/3) ... [2023-09-01 13:53:34,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69598a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:53:34, skipping insertion in model container [2023-09-01 13:53:34,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:53:33" (2/3) ... [2023-09-01 13:53:34,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69598a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:53:34, skipping insertion in model container [2023-09-01 13:53:34,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:53:34" (3/3) ... [2023-09-01 13:53:34,091 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-09-01 13:53:34,098 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:53:34,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:53:34,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:53:34,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:53:34,187 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:53:34,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-09-01 13:53:34,335 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-09-01 13:53:34,336 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:53:34,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-09-01 13:53:34,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-09-01 13:53:34,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-09-01 13:53:34,352 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:53:34,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-09-01 13:53:34,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-09-01 13:53:34,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-09-01 13:53:34,419 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-09-01 13:53:34,420 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:53:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-09-01 13:53:34,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-09-01 13:53:38,751 INFO L134 LiptonReduction]: Checked pairs total: 1615 [2023-09-01 13:53:38,752 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-09-01 13:53:38,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:53:38,768 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;@3557c769, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:53:38,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:53:38,775 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-09-01 13:53:38,775 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:53:38,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:38,776 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] [2023-09-01 13:53:38,776 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 13:53:38,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1107178468, now seen corresponding path program 1 times [2023-09-01 13:53:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:38,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857085030] [2023-09-01 13:53:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:39,514 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 13:53:39,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:39,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857085030] [2023-09-01 13:53:39,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857085030] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:53:39,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:53:39,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:53:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245494841] [2023-09-01 13:53:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:53:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:53:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:53:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:53:39,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 273 [2023-09-01 13:53:39,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 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 13:53:39,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:39,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 273 [2023-09-01 13:53:39,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:39,918 INFO L130 PetriNetUnfolder]: 679/943 cut-off events. [2023-09-01 13:53:39,919 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-09-01 13:53:39,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970 conditions, 943 events. 679/943 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3493 event pairs, 265 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 765. Up to 370 conditions per place. [2023-09-01 13:53:39,926 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 55 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-09-01 13:53:39,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 304 flow [2023-09-01 13:53:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:53:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:53:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 870 transitions. [2023-09-01 13:53:39,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552590266875981 [2023-09-01 13:53:39,956 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 870 transitions. [2023-09-01 13:53:39,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 870 transitions. [2023-09-01 13:53:39,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:39,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 870 transitions. [2023-09-01 13:53:39,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 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 13:53:39,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 13:53:39,977 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 13:53:39,978 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 7 states and 870 transitions. [2023-09-01 13:53:39,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 304 flow [2023-09-01 13:53:39,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 272 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:53:39,985 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 97 flow [2023-09-01 13:53:39,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-09-01 13:53:39,990 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-09-01 13:53:39,991 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 97 flow [2023-09-01 13:53:39,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 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 13:53:39,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:39,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:53:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:53:39,995 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 13:53:39,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1966737023, now seen corresponding path program 1 times [2023-09-01 13:53:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:39,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53633367] [2023-09-01 13:53:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:39,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:40,187 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 13:53:40,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53633367] [2023-09-01 13:53:40,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53633367] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:53:40,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:53:40,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:53:40,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674042606] [2023-09-01 13:53:40,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:53:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:53:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:53:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:53:40,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 273 [2023-09-01 13:53:40,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 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 13:53:40,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:40,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 273 [2023-09-01 13:53:40,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:40,351 INFO L130 PetriNetUnfolder]: 342/475 cut-off events. [2023-09-01 13:53:40,351 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-09-01 13:53:40,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 475 events. 342/475 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1468 event pairs, 133 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 1137. Up to 371 conditions per place. [2023-09-01 13:53:40,354 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 30 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-09-01 13:53:40,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 168 flow [2023-09-01 13:53:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:53:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:53:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-09-01 13:53:40,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146520146520147 [2023-09-01 13:53:40,357 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-09-01 13:53:40,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-09-01 13:53:40,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:40,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-09-01 13:53:40,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 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 13:53:40,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 13:53:40,361 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 13:53:40,361 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 97 flow. Second operand 4 states and 493 transitions. [2023-09-01 13:53:40,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 168 flow [2023-09-01 13:53:40,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 157 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 13:53:40,364 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 77 flow [2023-09-01 13:53:40,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-09-01 13:53:40,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-09-01 13:53:40,365 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 77 flow [2023-09-01 13:53:40,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 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 13:53:40,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:40,366 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 13:53:40,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:53:40,366 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 13:53:40,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash -805618038, now seen corresponding path program 1 times [2023-09-01 13:53:40,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974789340] [2023-09-01 13:53:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:53:40,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974789340] [2023-09-01 13:53:40,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974789340] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309605959] [2023-09-01 13:53:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:40,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:40,448 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 13:53:40,482 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 13:53:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:40,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:53:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:53:40,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:53:40,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309605959] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:40,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:53:40,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 13:53:40,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336422238] [2023-09-01 13:53:40,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:53:40,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:53:40,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:53:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 13:53:40,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 273 [2023-09-01 13:53:40,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 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 13:53:40,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:40,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 273 [2023-09-01 13:53:40,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:40,833 INFO L130 PetriNetUnfolder]: 311/453 cut-off events. [2023-09-01 13:53:40,833 INFO L131 PetriNetUnfolder]: For 117/143 co-relation queries the response was YES. [2023-09-01 13:53:40,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 453 events. 311/453 cut-off events. For 117/143 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1443 event pairs, 73 based on Foata normal form. 26/371 useless extension candidates. Maximal degree in co-relation 1011. Up to 349 conditions per place. [2023-09-01 13:53:40,836 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-09-01 13:53:40,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 177 flow [2023-09-01 13:53:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:53:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:53:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2023-09-01 13:53:40,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424908424908425 [2023-09-01 13:53:40,839 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2023-09-01 13:53:40,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2023-09-01 13:53:40,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:40,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2023-09-01 13:53:40,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 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 13:53:40,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 13:53:40,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 13:53:40,844 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 77 flow. Second operand 5 states and 604 transitions. [2023-09-01 13:53:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 177 flow [2023-09-01 13:53:40,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:53:40,846 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 88 flow [2023-09-01 13:53:40,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-09-01 13:53:40,847 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 13:53:40,847 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 88 flow [2023-09-01 13:53:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 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 13:53:40,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:40,848 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 13:53:40,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:53:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:41,054 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 13:53:41,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1619003621, now seen corresponding path program 1 times [2023-09-01 13:53:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:41,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957794709] [2023-09-01 13:53:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957794709] [2023-09-01 13:53:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957794709] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935193144] [2023-09-01 13:53:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:41,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:41,681 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 13:53:41,706 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 13:53:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:53:41,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:42,217 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-09-01 13:53:42,218 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 73 treesize of output 59 [2023-09-01 13:53:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:42,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:42,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:42,451 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 85 treesize of output 45 [2023-09-01 13:53:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935193144] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:42,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-09-01 13:53:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121662358] [2023-09-01 13:53:42,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:53:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:53:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:53:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 273 [2023-09-01 13:53:43,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 88 flow. Second operand has 23 states, 23 states have (on average 101.6086956521739) internal successors, (2337), 23 states have internal predecessors, (2337), 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 13:53:43,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:43,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 273 [2023-09-01 13:53:43,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:44,618 INFO L130 PetriNetUnfolder]: 679/981 cut-off events. [2023-09-01 13:53:44,619 INFO L131 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2023-09-01 13:53:44,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 981 events. 679/981 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3670 event pairs, 84 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 2286. Up to 677 conditions per place. [2023-09-01 13:53:44,624 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 73 selfloop transitions, 35 changer transitions 4/113 dead transitions. [2023-09-01 13:53:44,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 113 transitions, 564 flow [2023-09-01 13:53:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:53:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:53:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1396 transitions. [2023-09-01 13:53:44,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39335023950408565 [2023-09-01 13:53:44,629 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1396 transitions. [2023-09-01 13:53:44,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1396 transitions. [2023-09-01 13:53:44,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:44,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1396 transitions. [2023-09-01 13:53:44,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.38461538461539) internal successors, (1396), 13 states have internal predecessors, (1396), 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 13:53:44,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 13:53:44,638 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 13:53:44,638 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 88 flow. Second operand 13 states and 1396 transitions. [2023-09-01 13:53:44,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 113 transitions, 564 flow [2023-09-01 13:53:44,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 536 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 13:53:44,644 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 304 flow [2023-09-01 13:53:44,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=304, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-09-01 13:53:44,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2023-09-01 13:53:44,646 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 304 flow [2023-09-01 13:53:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 101.6086956521739) internal successors, (2337), 23 states have internal predecessors, (2337), 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 13:53:44,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:44,647 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 13:53:44,659 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 13:53:44,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 13:53:44,853 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 13:53:44,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:44,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1587343155, now seen corresponding path program 2 times [2023-09-01 13:53:44,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:44,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063058267] [2023-09-01 13:53:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:44,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:45,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063058267] [2023-09-01 13:53:45,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063058267] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207314135] [2023-09-01 13:53:45,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:53:45,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:45,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:45,509 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 13:53:45,524 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 13:53:45,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:53:45,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:53:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:45,938 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:53:45,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:45,941 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 64 treesize of output 37 [2023-09-01 13:53:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:46,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:46,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:46,114 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 85 treesize of output 45 [2023-09-01 13:53:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207314135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:46,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-09-01 13:53:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250635441] [2023-09-01 13:53:46,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:53:46,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:46,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:53:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:53:47,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 273 [2023-09-01 13:53:47,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 304 flow. Second operand has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 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 13:53:47,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:47,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 273 [2023-09-01 13:53:47,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:48,058 INFO L130 PetriNetUnfolder]: 1001/1468 cut-off events. [2023-09-01 13:53:48,058 INFO L131 PetriNetUnfolder]: For 1349/1349 co-relation queries the response was YES. [2023-09-01 13:53:48,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 1468 events. 1001/1468 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5408 event pairs, 136 based on Foata normal form. 2/1464 useless extension candidates. Maximal degree in co-relation 4542. Up to 1033 conditions per place. [2023-09-01 13:53:48,067 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 105 selfloop transitions, 54 changer transitions 7/166 dead transitions. [2023-09-01 13:53:48,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 166 transitions, 1007 flow [2023-09-01 13:53:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:53:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:53:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1867 transitions. [2023-09-01 13:53:48,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37993487993487995 [2023-09-01 13:53:48,073 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1867 transitions. [2023-09-01 13:53:48,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1867 transitions. [2023-09-01 13:53:48,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:48,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1867 transitions. [2023-09-01 13:53:48,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 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 13:53:48,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 13:53:48,085 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 13:53:48,086 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 304 flow. Second operand 18 states and 1867 transitions. [2023-09-01 13:53:48,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 166 transitions, 1007 flow [2023-09-01 13:53:48,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 166 transitions, 993 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 13:53:48,093 INFO L231 Difference]: Finished difference. Result has 74 places, 97 transitions, 664 flow [2023-09-01 13:53:48,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=664, PETRI_PLACES=74, PETRI_TRANSITIONS=97} [2023-09-01 13:53:48,094 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-09-01 13:53:48,094 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 97 transitions, 664 flow [2023-09-01 13:53:48,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 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 13:53:48,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:48,096 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 13:53:48,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:53:48,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:48,302 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 13:53:48,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1702762413, now seen corresponding path program 3 times [2023-09-01 13:53:48,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:48,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67883047] [2023-09-01 13:53:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:49,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:49,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67883047] [2023-09-01 13:53:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67883047] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:49,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035340506] [2023-09-01 13:53:49,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:53:49,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:49,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:49,065 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 13:53:49,067 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 13:53:49,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:53:49,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 13:53:49,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:49,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:53:49,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:49,498 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 64 treesize of output 37 [2023-09-01 13:53:49,571 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 13:53:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:49,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:49,688 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 85 treesize of output 45 [2023-09-01 13:53:49,874 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 13:53:49,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035340506] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:49,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:49,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-09-01 13:53:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047646845] [2023-09-01 13:53:49,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:49,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:53:49,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:49,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:53:49,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-09-01 13:53:51,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 273 [2023-09-01 13:53:51,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 664 flow. Second operand has 26 states, 26 states have (on average 92.42307692307692) internal successors, (2403), 26 states have internal predecessors, (2403), 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 13:53:51,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:51,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 273 [2023-09-01 13:53:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:52,400 INFO L130 PetriNetUnfolder]: 1399/2097 cut-off events. [2023-09-01 13:53:52,400 INFO L131 PetriNetUnfolder]: For 3789/3789 co-relation queries the response was YES. [2023-09-01 13:53:52,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 2097 events. 1399/2097 cut-off events. For 3789/3789 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8873 event pairs, 132 based on Foata normal form. 3/2100 useless extension candidates. Maximal degree in co-relation 8253. Up to 1224 conditions per place. [2023-09-01 13:53:52,416 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 161 selfloop transitions, 107 changer transitions 5/273 dead transitions. [2023-09-01 13:53:52,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 273 transitions, 2012 flow [2023-09-01 13:53:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:53:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:53:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2180 transitions. [2023-09-01 13:53:52,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36297036297036295 [2023-09-01 13:53:52,423 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2180 transitions. [2023-09-01 13:53:52,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2180 transitions. [2023-09-01 13:53:52,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:52,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2180 transitions. [2023-09-01 13:53:52,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 99.0909090909091) internal successors, (2180), 22 states have internal predecessors, (2180), 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 13:53:52,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 13:53:52,437 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 13:53:52,437 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 664 flow. Second operand 22 states and 2180 transitions. [2023-09-01 13:53:52,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 273 transitions, 2012 flow [2023-09-01 13:53:52,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 273 transitions, 1953 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-09-01 13:53:52,458 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1411 flow [2023-09-01 13:53:52,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1411, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2023-09-01 13:53:52,459 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2023-09-01 13:53:52,459 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1411 flow [2023-09-01 13:53:52,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 92.42307692307692) internal successors, (2403), 26 states have internal predecessors, (2403), 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 13:53:52,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:52,460 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 13:53:52,473 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 13:53:52,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:52,667 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 13:53:52,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1571153735, now seen corresponding path program 4 times [2023-09-01 13:53:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:52,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395977855] [2023-09-01 13:53:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:53,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395977855] [2023-09-01 13:53:53,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395977855] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:53,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034930648] [2023-09-01 13:53:53,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:53:53,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:53,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:53,332 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 13:53:53,358 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 13:53:53,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:53:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 13:53:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:53:53,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:53:53,876 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:53:53,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:53,879 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 64 treesize of output 37 [2023-09-01 13:53:53,942 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 13:53:53,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:54,067 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_261 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0)))) (forall ((v_ArrVal_261 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse1) (<= .cse1 c_~max2~0)))))) is different from false [2023-09-01 13:53:54,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:54,100 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 139 treesize of output 99 [2023-09-01 13:53:54,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2023-09-01 13:53:54,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-09-01 13:53:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 13:53:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034930648] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:54,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:54,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-09-01 13:53:54,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233920574] [2023-09-01 13:53:54,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:54,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:53:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:53:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=592, Unknown=1, NotChecked=50, Total=756 [2023-09-01 13:53:54,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-09-01 13:53:54,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1411 flow. Second operand has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 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 13:53:54,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:54,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-09-01 13:53:54,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:55,935 INFO L130 PetriNetUnfolder]: 1794/2701 cut-off events. [2023-09-01 13:53:55,935 INFO L131 PetriNetUnfolder]: For 9600/9600 co-relation queries the response was YES. [2023-09-01 13:53:55,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13200 conditions, 2701 events. 1794/2701 cut-off events. For 9600/9600 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12296 event pairs, 168 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 13154. Up to 1507 conditions per place. [2023-09-01 13:53:55,961 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 175 selfloop transitions, 150 changer transitions 4/329 dead transitions. [2023-09-01 13:53:55,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 329 transitions, 3191 flow [2023-09-01 13:53:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:53:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:53:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1763 transitions. [2023-09-01 13:53:55,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3075178789464504 [2023-09-01 13:53:55,967 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1763 transitions. [2023-09-01 13:53:55,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1763 transitions. [2023-09-01 13:53:55,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:55,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1763 transitions. [2023-09-01 13:53:55,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.95238095238095) internal successors, (1763), 21 states have internal predecessors, (1763), 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 13:53:55,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 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 13:53:55,978 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 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 13:53:55,979 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1411 flow. Second operand 21 states and 1763 transitions. [2023-09-01 13:53:55,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 329 transitions, 3191 flow [2023-09-01 13:53:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 329 transitions, 3065 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-09-01 13:53:56,052 INFO L231 Difference]: Finished difference. Result has 127 places, 222 transitions, 2379 flow [2023-09-01 13:53:56,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2379, PETRI_PLACES=127, PETRI_TRANSITIONS=222} [2023-09-01 13:53:56,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-09-01 13:53:56,053 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 222 transitions, 2379 flow [2023-09-01 13:53:56,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 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 13:53:56,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:56,054 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 13:53:56,065 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 13:53:56,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:56,265 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 13:53:56,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:56,265 INFO L85 PathProgramCache]: Analyzing trace with hash 353698307, now seen corresponding path program 5 times [2023-09-01 13:53:56,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:56,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793418650] [2023-09-01 13:53:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:56,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:53:56,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:56,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793418650] [2023-09-01 13:53:56,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793418650] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:56,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126022758] [2023-09-01 13:53:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:53:56,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:56,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:56,814 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 13:53:56,816 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 13:53:56,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:53:56,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:56,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:53:56,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:57,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:57,162 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 77 treesize of output 71 [2023-09-01 13:53:57,608 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 13:53:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:57,803 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:53:57,803 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 73 treesize of output 41 [2023-09-01 13:53:57,873 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 13:53:57,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126022758] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:57,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:57,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-09-01 13:53:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194232988] [2023-09-01 13:53:57,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:53:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:53:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:53:58,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-09-01 13:53:58,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 222 transitions, 2379 flow. Second operand has 22 states, 22 states have (on average 102.68181818181819) internal successors, (2259), 22 states have internal predecessors, (2259), 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 13:53:58,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:58,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-09-01 13:53:58,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:00,570 INFO L130 PetriNetUnfolder]: 2493/3915 cut-off events. [2023-09-01 13:54:00,570 INFO L131 PetriNetUnfolder]: For 20392/20444 co-relation queries the response was YES. [2023-09-01 13:54:00,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 3915 events. 2493/3915 cut-off events. For 20392/20444 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21794 event pairs, 185 based on Foata normal form. 38/3940 useless extension candidates. Maximal degree in co-relation 20714. Up to 2338 conditions per place. [2023-09-01 13:54:00,611 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 217 selfloop transitions, 197 changer transitions 9/429 dead transitions. [2023-09-01 13:54:00,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 429 transitions, 4902 flow [2023-09-01 13:54:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 13:54:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 13:54:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2580 transitions. [2023-09-01 13:54:00,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2023-09-01 13:54:00,620 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2580 transitions. [2023-09-01 13:54:00,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2580 transitions. [2023-09-01 13:54:00,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:00,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2580 transitions. [2023-09-01 13:54:00,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 107.5) internal successors, (2580), 24 states have internal predecessors, (2580), 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 13:54:00,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 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 13:54:00,649 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 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 13:54:00,649 INFO L175 Difference]: Start difference. First operand has 127 places, 222 transitions, 2379 flow. Second operand 24 states and 2580 transitions. [2023-09-01 13:54:00,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 429 transitions, 4902 flow [2023-09-01 13:54:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 429 transitions, 4594 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-09-01 13:54:00,718 INFO L231 Difference]: Finished difference. Result has 154 places, 337 transitions, 3925 flow [2023-09-01 13:54:00,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3925, PETRI_PLACES=154, PETRI_TRANSITIONS=337} [2023-09-01 13:54:00,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-09-01 13:54:00,722 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 337 transitions, 3925 flow [2023-09-01 13:54:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.68181818181819) internal successors, (2259), 22 states have internal predecessors, (2259), 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 13:54:00,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:00,723 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 13:54:00,731 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 13:54:00,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:00,930 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 13:54:00,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash -536441915, now seen corresponding path program 6 times [2023-09-01 13:54:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:00,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114360198] [2023-09-01 13:54:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114360198] [2023-09-01 13:54:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114360198] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651771042] [2023-09-01 13:54:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:54:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:01,429 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 13:54:01,432 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 13:54:01,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:54:01,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 13:54:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:01,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-09-01 13:54:01,793 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 13:54:01,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:01,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:01,883 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 73 treesize of output 45 [2023-09-01 13:54:02,034 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 13:54:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651771042] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:02,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:02,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-09-01 13:54:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128513771] [2023-09-01 13:54:02,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:02,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:54:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:54:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:54:02,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 273 [2023-09-01 13:54:02,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 337 transitions, 3925 flow. Second operand has 22 states, 22 states have (on average 100.77272727272727) internal successors, (2217), 22 states have internal predecessors, (2217), 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 13:54:02,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:02,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 273 [2023-09-01 13:54:02,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:03,836 INFO L130 PetriNetUnfolder]: 2826/4401 cut-off events. [2023-09-01 13:54:03,836 INFO L131 PetriNetUnfolder]: For 29259/29259 co-relation queries the response was YES. [2023-09-01 13:54:03,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 4401 events. 2826/4401 cut-off events. For 29259/29259 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23294 event pairs, 721 based on Foata normal form. 2/4403 useless extension candidates. Maximal degree in co-relation 25180. Up to 3860 conditions per place. [2023-09-01 13:54:03,870 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 278 selfloop transitions, 135 changer transitions 2/415 dead transitions. [2023-09-01 13:54:03,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 415 transitions, 5444 flow [2023-09-01 13:54:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:54:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:54:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1886 transitions. [2023-09-01 13:54:03,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838013838013838 [2023-09-01 13:54:03,875 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1886 transitions. [2023-09-01 13:54:03,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1886 transitions. [2023-09-01 13:54:03,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:03,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1886 transitions. [2023-09-01 13:54:03,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.77777777777777) internal successors, (1886), 18 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 13:54:03,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 13:54:03,884 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 13:54:03,885 INFO L175 Difference]: Start difference. First operand has 154 places, 337 transitions, 3925 flow. Second operand 18 states and 1886 transitions. [2023-09-01 13:54:03,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 415 transitions, 5444 flow [2023-09-01 13:54:04,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 415 transitions, 4874 flow, removed 222 selfloop flow, removed 7 redundant places. [2023-09-01 13:54:04,107 INFO L231 Difference]: Finished difference. Result has 168 places, 363 transitions, 4059 flow [2023-09-01 13:54:04,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4059, PETRI_PLACES=168, PETRI_TRANSITIONS=363} [2023-09-01 13:54:04,108 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2023-09-01 13:54:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 363 transitions, 4059 flow [2023-09-01 13:54:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.77272727272727) internal successors, (2217), 22 states have internal predecessors, (2217), 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 13:54:04,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:04,109 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 13:54:04,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:04,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:04,318 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 13:54:04,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 820266829, now seen corresponding path program 7 times [2023-09-01 13:54:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:04,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676523046] [2023-09-01 13:54:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:04,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:05,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676523046] [2023-09-01 13:54:05,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676523046] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878675802] [2023-09-01 13:54:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:54:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:05,109 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 13:54:05,113 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 13:54:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:54:05,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:05,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-09-01 13:54:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:05,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:05,671 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 85 treesize of output 45 [2023-09-01 13:54:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878675802] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:05,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-09-01 13:54:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321977831] [2023-09-01 13:54:05,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:54:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:54:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:54:06,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 273 [2023-09-01 13:54:06,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 363 transitions, 4059 flow. Second operand has 24 states, 24 states have (on average 94.45833333333333) internal successors, (2267), 24 states have internal predecessors, (2267), 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 13:54:06,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:06,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 273 [2023-09-01 13:54:06,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:08,032 INFO L130 PetriNetUnfolder]: 2667/4232 cut-off events. [2023-09-01 13:54:08,032 INFO L131 PetriNetUnfolder]: For 22344/22381 co-relation queries the response was YES. [2023-09-01 13:54:08,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22983 conditions, 4232 events. 2667/4232 cut-off events. For 22344/22381 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23723 event pairs, 570 based on Foata normal form. 24/4240 useless extension candidates. Maximal degree in co-relation 22917. Up to 3867 conditions per place. [2023-09-01 13:54:08,063 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 289 selfloop transitions, 110 changer transitions 1/410 dead transitions. [2023-09-01 13:54:08,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 410 transitions, 5166 flow [2023-09-01 13:54:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:54:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:54:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1095 transitions. [2023-09-01 13:54:08,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3646353646353646 [2023-09-01 13:54:08,065 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1095 transitions. [2023-09-01 13:54:08,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1095 transitions. [2023-09-01 13:54:08,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:08,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1095 transitions. [2023-09-01 13:54:08,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.54545454545455) internal successors, (1095), 11 states have internal predecessors, (1095), 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 13:54:08,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 13:54:08,070 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 13:54:08,070 INFO L175 Difference]: Start difference. First operand has 168 places, 363 transitions, 4059 flow. Second operand 11 states and 1095 transitions. [2023-09-01 13:54:08,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 410 transitions, 5166 flow [2023-09-01 13:54:08,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 410 transitions, 5000 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 13:54:08,150 INFO L231 Difference]: Finished difference. Result has 173 places, 375 transitions, 4307 flow [2023-09-01 13:54:08,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4307, PETRI_PLACES=173, PETRI_TRANSITIONS=375} [2023-09-01 13:54:08,151 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2023-09-01 13:54:08,151 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 375 transitions, 4307 flow [2023-09-01 13:54:08,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.45833333333333) internal successors, (2267), 24 states have internal predecessors, (2267), 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 13:54:08,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:08,152 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 13:54:08,163 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 13:54:08,357 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,SelfDestructingSolverStorable9 [2023-09-01 13:54:08,358 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 13:54:08,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 663032483, now seen corresponding path program 8 times [2023-09-01 13:54:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037991275] [2023-09-01 13:54:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037991275] [2023-09-01 13:54:09,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037991275] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797573078] [2023-09-01 13:54:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:54:09,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:09,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:09,029 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 13:54:09,054 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 13:54:09,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:54:09,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 13:54:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:09,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:09,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:54:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:09,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:54:09,724 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:09,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:09,726 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 64 treesize of output 37 [2023-09-01 13:54:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:09,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:09,983 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1))) (or (= c_~max1~0 .cse0) (<= .cse0 c_~max2~0)))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1)))))) is different from false [2023-09-01 13:54:10,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:10,006 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 409 treesize of output 353 [2023-09-01 13:54:10,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 171 [2023-09-01 13:54:10,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 165 [2023-09-01 13:54:10,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 153 [2023-09-01 13:54:10,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 129 [2023-09-01 13:54:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:10,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797573078] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:10,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:10,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-09-01 13:54:10,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516411513] [2023-09-01 13:54:10,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:54:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:54:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=598, Unknown=2, NotChecked=50, Total=756 [2023-09-01 13:54:10,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-09-01 13:54:10,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 375 transitions, 4307 flow. Second operand has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 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 13:54:10,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:10,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-09-01 13:54:10,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:15,905 INFO L130 PetriNetUnfolder]: 2910/4621 cut-off events. [2023-09-01 13:54:15,905 INFO L131 PetriNetUnfolder]: For 26057/26173 co-relation queries the response was YES. [2023-09-01 13:54:15,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25525 conditions, 4621 events. 2910/4621 cut-off events. For 26057/26173 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26544 event pairs, 407 based on Foata normal form. 42/4649 useless extension candidates. Maximal degree in co-relation 25456. Up to 3074 conditions per place. [2023-09-01 13:54:15,947 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 248 selfloop transitions, 201 changer transitions 4/463 dead transitions. [2023-09-01 13:54:15,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 463 transitions, 5800 flow [2023-09-01 13:54:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:54:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:54:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1102 transitions. [2023-09-01 13:54:15,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31051000281769514 [2023-09-01 13:54:15,949 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1102 transitions. [2023-09-01 13:54:15,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1102 transitions. [2023-09-01 13:54:15,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:15,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1102 transitions. [2023-09-01 13:54:15,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.76923076923077) internal successors, (1102), 13 states have internal predecessors, (1102), 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 13:54:15,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 13:54:15,955 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 13:54:15,955 INFO L175 Difference]: Start difference. First operand has 173 places, 375 transitions, 4307 flow. Second operand 13 states and 1102 transitions. [2023-09-01 13:54:15,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 463 transitions, 5800 flow [2023-09-01 13:54:16,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 463 transitions, 5649 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-09-01 13:54:16,081 INFO L231 Difference]: Finished difference. Result has 183 places, 398 transitions, 5003 flow [2023-09-01 13:54:16,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5003, PETRI_PLACES=183, PETRI_TRANSITIONS=398} [2023-09-01 13:54:16,082 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2023-09-01 13:54:16,082 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 398 transitions, 5003 flow [2023-09-01 13:54:16,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 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 13:54:16,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:16,083 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] [2023-09-01 13:54:16,091 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 13:54:16,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:16,289 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 13:54:16,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1650774356, now seen corresponding path program 9 times [2023-09-01 13:54:16,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851917405] [2023-09-01 13:54:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:16,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:16,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851917405] [2023-09-01 13:54:16,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851917405] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:16,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793964112] [2023-09-01 13:54:16,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:54:16,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:16,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:16,383 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 13:54:16,408 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 13:54:16,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:54:16,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:16,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:54:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:16,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793964112] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:16,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:16,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 13:54:16,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912132696] [2023-09-01 13:54:16,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:16,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:54:16,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:16,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:54:16,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:54:16,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 273 [2023-09-01 13:54:16,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 398 transitions, 5003 flow. Second operand has 14 states, 14 states have (on average 116.35714285714286) internal successors, (1629), 14 states have internal predecessors, (1629), 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 13:54:16,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:16,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 273 [2023-09-01 13:54:16,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:17,741 INFO L130 PetriNetUnfolder]: 2867/4707 cut-off events. [2023-09-01 13:54:17,741 INFO L131 PetriNetUnfolder]: For 39136/39461 co-relation queries the response was YES. [2023-09-01 13:54:17,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27443 conditions, 4707 events. 2867/4707 cut-off events. For 39136/39461 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28953 event pairs, 726 based on Foata normal form. 420/5018 useless extension candidates. Maximal degree in co-relation 27370. Up to 2543 conditions per place. [2023-09-01 13:54:17,789 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 355 selfloop transitions, 39 changer transitions 1/427 dead transitions. [2023-09-01 13:54:17,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 427 transitions, 5969 flow [2023-09-01 13:54:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:54:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:54:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2023-09-01 13:54:17,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-09-01 13:54:17,792 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2023-09-01 13:54:17,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2023-09-01 13:54:17,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:17,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2023-09-01 13:54:17,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 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 13:54:17,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 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 13:54:17,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 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 13:54:17,796 INFO L175 Difference]: Start difference. First operand has 183 places, 398 transitions, 5003 flow. Second operand 8 states and 984 transitions. [2023-09-01 13:54:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 427 transitions, 5969 flow [2023-09-01 13:54:17,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 427 transitions, 5756 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-09-01 13:54:17,930 INFO L231 Difference]: Finished difference. Result has 186 places, 366 transitions, 4532 flow [2023-09-01 13:54:17,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4349, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=186, PETRI_TRANSITIONS=366} [2023-09-01 13:54:17,931 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2023-09-01 13:54:17,932 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 366 transitions, 4532 flow [2023-09-01 13:54:17,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 116.35714285714286) internal successors, (1629), 14 states have internal predecessors, (1629), 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 13:54:17,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:17,933 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 13:54:17,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:18,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:54:18,142 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 13:54:18,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1159546519, now seen corresponding path program 1 times [2023-09-01 13:54:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:18,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913039325] [2023-09-01 13:54:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:18,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:18,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913039325] [2023-09-01 13:54:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913039325] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321056998] [2023-09-01 13:54:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:18,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:18,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:54:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 13:54:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:18,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:18,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321056998] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:18,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:18,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 13:54:18,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493845416] [2023-09-01 13:54:18,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:18,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:54:18,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:54:18,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:54:18,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:18,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 366 transitions, 4532 flow. Second operand has 16 states, 16 states have (on average 110.3125) internal successors, (1765), 16 states have internal predecessors, (1765), 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 13:54:18,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:18,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:18,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:19,508 INFO L130 PetriNetUnfolder]: 2773/4666 cut-off events. [2023-09-01 13:54:19,509 INFO L131 PetriNetUnfolder]: For 38674/38698 co-relation queries the response was YES. [2023-09-01 13:54:19,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26816 conditions, 4666 events. 2773/4666 cut-off events. For 38674/38698 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28678 event pairs, 315 based on Foata normal form. 339/4994 useless extension candidates. Maximal degree in co-relation 26739. Up to 2009 conditions per place. [2023-09-01 13:54:19,542 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 391 selfloop transitions, 44 changer transitions 20/470 dead transitions. [2023-09-01 13:54:19,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 470 transitions, 6221 flow [2023-09-01 13:54:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:54:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:54:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1284 transitions. [2023-09-01 13:54:19,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275724275724276 [2023-09-01 13:54:19,545 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1284 transitions. [2023-09-01 13:54:19,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1284 transitions. [2023-09-01 13:54:19,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:19,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1284 transitions. [2023-09-01 13:54:19,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 116.72727272727273) internal successors, (1284), 11 states have internal predecessors, (1284), 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 13:54:19,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 13:54:19,550 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 13:54:19,550 INFO L175 Difference]: Start difference. First operand has 186 places, 366 transitions, 4532 flow. Second operand 11 states and 1284 transitions. [2023-09-01 13:54:19,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 470 transitions, 6221 flow [2023-09-01 13:54:19,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 470 transitions, 6216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:54:19,696 INFO L231 Difference]: Finished difference. Result has 200 places, 298 transitions, 3944 flow [2023-09-01 13:54:19,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=200, PETRI_TRANSITIONS=298} [2023-09-01 13:54:19,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-09-01 13:54:19,697 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 298 transitions, 3944 flow [2023-09-01 13:54:19,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.3125) internal successors, (1765), 16 states have internal predecessors, (1765), 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 13:54:19,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:19,698 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] [2023-09-01 13:54:19,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 13:54:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:54:19,904 INFO L420 AbstractCegarLoop]: === Iteration 14 === 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 13:54:19,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -826576938, now seen corresponding path program 10 times [2023-09-01 13:54:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:19,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232591551] [2023-09-01 13:54:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:19,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232591551] [2023-09-01 13:54:20,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232591551] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:20,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122045146] [2023-09-01 13:54:20,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:54:20,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:20,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:20,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:20,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:54:20,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:54:20,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 13:54:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:20,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122045146] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:20,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:20,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2023-09-01 13:54:20,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421200549] [2023-09-01 13:54:20,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:20,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:54:20,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:20,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:54:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:54:20,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 273 [2023-09-01 13:54:20,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 298 transitions, 3944 flow. Second operand has 17 states, 17 states have (on average 113.47058823529412) internal successors, (1929), 17 states have internal predecessors, (1929), 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 13:54:20,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:20,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 273 [2023-09-01 13:54:20,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:21,788 INFO L130 PetriNetUnfolder]: 2231/3931 cut-off events. [2023-09-01 13:54:21,789 INFO L131 PetriNetUnfolder]: For 47227/47254 co-relation queries the response was YES. [2023-09-01 13:54:21,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 3931 events. 2231/3931 cut-off events. For 47227/47254 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25646 event pairs, 249 based on Foata normal form. 317/4235 useless extension candidates. Maximal degree in co-relation 25267. Up to 964 conditions per place. [2023-09-01 13:54:21,882 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 190 selfloop transitions, 89 changer transitions 153/436 dead transitions. [2023-09-01 13:54:21,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 436 transitions, 5975 flow [2023-09-01 13:54:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:54:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:54:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2586 transitions. [2023-09-01 13:54:21,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305694305694306 [2023-09-01 13:54:21,888 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2586 transitions. [2023-09-01 13:54:21,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2586 transitions. [2023-09-01 13:54:21,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:21,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2586 transitions. [2023-09-01 13:54:21,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.54545454545455) internal successors, (2586), 22 states have internal predecessors, (2586), 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 13:54:21,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 13:54:21,898 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 13:54:21,899 INFO L175 Difference]: Start difference. First operand has 200 places, 298 transitions, 3944 flow. Second operand 22 states and 2586 transitions. [2023-09-01 13:54:21,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 436 transitions, 5975 flow [2023-09-01 13:54:22,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 436 transitions, 5627 flow, removed 79 selfloop flow, removed 14 redundant places. [2023-09-01 13:54:22,041 INFO L231 Difference]: Finished difference. Result has 207 places, 196 transitions, 2500 flow [2023-09-01 13:54:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2500, PETRI_PLACES=207, PETRI_TRANSITIONS=196} [2023-09-01 13:54:22,041 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-09-01 13:54:22,041 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 196 transitions, 2500 flow [2023-09-01 13:54:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 113.47058823529412) internal successors, (1929), 17 states have internal predecessors, (1929), 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 13:54:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:22,042 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] [2023-09-01 13:54:22,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 13:54:22,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:54:22,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 13:54:22,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash 858875532, now seen corresponding path program 11 times [2023-09-01 13:54:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881704457] [2023-09-01 13:54:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881704457] [2023-09-01 13:54:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881704457] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526436597] [2023-09-01 13:54:22,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:54:22,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:22,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:22,345 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:22,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:54:22,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:54:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:22,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:54:22,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:22,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:22,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526436597] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:22,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:22,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-09-01 13:54:22,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991284301] [2023-09-01 13:54:22,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:22,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:54:22,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:54:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:54:22,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 273 [2023-09-01 13:54:22,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 196 transitions, 2500 flow. Second operand has 15 states, 15 states have (on average 116.33333333333333) internal successors, (1745), 15 states have internal predecessors, (1745), 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 13:54:22,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:22,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 273 [2023-09-01 13:54:22,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:22,977 INFO L130 PetriNetUnfolder]: 839/1263 cut-off events. [2023-09-01 13:54:22,977 INFO L131 PetriNetUnfolder]: For 14706/14799 co-relation queries the response was YES. [2023-09-01 13:54:22,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 1263 events. 839/1263 cut-off events. For 14706/14799 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5310 event pairs, 130 based on Foata normal form. 135/1366 useless extension candidates. Maximal degree in co-relation 9217. Up to 678 conditions per place. [2023-09-01 13:54:22,987 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 111 selfloop transitions, 65 changer transitions 0/186 dead transitions. [2023-09-01 13:54:22,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2664 flow [2023-09-01 13:54:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:54:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:54:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 843 transitions. [2023-09-01 13:54:22,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411302982731554 [2023-09-01 13:54:22,989 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 843 transitions. [2023-09-01 13:54:22,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 843 transitions. [2023-09-01 13:54:22,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:22,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 843 transitions. [2023-09-01 13:54:22,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 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 13:54:22,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 13:54:22,992 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 13:54:22,992 INFO L175 Difference]: Start difference. First operand has 207 places, 196 transitions, 2500 flow. Second operand 7 states and 843 transitions. [2023-09-01 13:54:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2664 flow [2023-09-01 13:54:23,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 2089 flow, removed 168 selfloop flow, removed 34 redundant places. [2023-09-01 13:54:23,032 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 1699 flow [2023-09-01 13:54:23,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2023-09-01 13:54:23,032 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-09-01 13:54:23,032 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 1699 flow [2023-09-01 13:54:23,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 116.33333333333333) internal successors, (1745), 15 states have internal predecessors, (1745), 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 13:54:23,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:23,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:23,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:54:23,238 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 13:54:23,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1834037619, now seen corresponding path program 12 times [2023-09-01 13:54:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:23,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538969516] [2023-09-01 13:54:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538969516] [2023-09-01 13:54:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538969516] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846294854] [2023-09-01 13:54:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:54:23,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:23,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:23,367 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:23,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:54:23,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:54:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:23,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846294854] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:23,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:23,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-09-01 13:54:23,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016096009] [2023-09-01 13:54:23,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:23,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:54:23,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:23,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:54:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:54:24,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:24,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 1699 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:24,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:24,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:24,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:24,689 INFO L130 PetriNetUnfolder]: 1410/2155 cut-off events. [2023-09-01 13:54:24,689 INFO L131 PetriNetUnfolder]: For 11222/11234 co-relation queries the response was YES. [2023-09-01 13:54:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2155 events. 1410/2155 cut-off events. For 11222/11234 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9665 event pairs, 245 based on Foata normal form. 29/2170 useless extension candidates. Maximal degree in co-relation 11795. Up to 1108 conditions per place. [2023-09-01 13:54:24,702 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 242 selfloop transitions, 108 changer transitions 0/360 dead transitions. [2023-09-01 13:54:24,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 360 transitions, 4084 flow [2023-09-01 13:54:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:54:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:54:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1741 transitions. [2023-09-01 13:54:24,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42515262515262514 [2023-09-01 13:54:24,704 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1741 transitions. [2023-09-01 13:54:24,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1741 transitions. [2023-09-01 13:54:24,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:24,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1741 transitions. [2023-09-01 13:54:24,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.06666666666666) internal successors, (1741), 15 states have internal predecessors, (1741), 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 13:54:24,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 13:54:24,710 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 13:54:24,710 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 1699 flow. Second operand 15 states and 1741 transitions. [2023-09-01 13:54:24,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 360 transitions, 4084 flow [2023-09-01 13:54:24,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 360 transitions, 3854 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 13:54:24,744 INFO L231 Difference]: Finished difference. Result has 129 places, 234 transitions, 2626 flow [2023-09-01 13:54:24,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2626, PETRI_PLACES=129, PETRI_TRANSITIONS=234} [2023-09-01 13:54:24,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2023-09-01 13:54:24,745 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 234 transitions, 2626 flow [2023-09-01 13:54:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:24,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:24,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:24,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:24,951 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 13:54:24,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1735626719, now seen corresponding path program 13 times [2023-09-01 13:54:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501004587] [2023-09-01 13:54:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501004587] [2023-09-01 13:54:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501004587] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142984325] [2023-09-01 13:54:25,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:54:25,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:25,079 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:25,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:54:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:25,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142984325] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:25,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:25,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-09-01 13:54:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852157837] [2023-09-01 13:54:25,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:54:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:54:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:54:25,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:25,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 234 transitions, 2626 flow. Second operand has 18 states, 18 states have (on average 110.11111111111111) internal successors, (1982), 18 states have internal predecessors, (1982), 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 13:54:25,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:25,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:25,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:26,072 INFO L130 PetriNetUnfolder]: 1735/2659 cut-off events. [2023-09-01 13:54:26,072 INFO L131 PetriNetUnfolder]: For 19320/19324 co-relation queries the response was YES. [2023-09-01 13:54:26,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 2659 events. 1735/2659 cut-off events. For 19320/19324 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12503 event pairs, 318 based on Foata normal form. 32/2688 useless extension candidates. Maximal degree in co-relation 16198. Up to 1226 conditions per place. [2023-09-01 13:54:26,089 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 253 selfloop transitions, 79 changer transitions 0/341 dead transitions. [2023-09-01 13:54:26,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 341 transitions, 4241 flow [2023-09-01 13:54:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:54:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:54:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1040 transitions. [2023-09-01 13:54:26,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2023-09-01 13:54:26,091 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1040 transitions. [2023-09-01 13:54:26,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1040 transitions. [2023-09-01 13:54:26,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:26,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1040 transitions. [2023-09-01 13:54:26,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 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 13:54:26,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 13:54:26,093 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 13:54:26,094 INFO L175 Difference]: Start difference. First operand has 129 places, 234 transitions, 2626 flow. Second operand 9 states and 1040 transitions. [2023-09-01 13:54:26,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 341 transitions, 4241 flow [2023-09-01 13:54:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 341 transitions, 4026 flow, removed 74 selfloop flow, removed 4 redundant places. [2023-09-01 13:54:26,156 INFO L231 Difference]: Finished difference. Result has 137 places, 242 transitions, 2872 flow [2023-09-01 13:54:26,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2872, PETRI_PLACES=137, PETRI_TRANSITIONS=242} [2023-09-01 13:54:26,157 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-09-01 13:54:26,157 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 242 transitions, 2872 flow [2023-09-01 13:54:26,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.11111111111111) internal successors, (1982), 18 states have internal predecessors, (1982), 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 13:54:26,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:26,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:26,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:26,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:54:26,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 13:54:26,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:26,364 INFO L85 PathProgramCache]: Analyzing trace with hash -408139775, now seen corresponding path program 14 times [2023-09-01 13:54:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:26,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729954590] [2023-09-01 13:54:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:26,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:26,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729954590] [2023-09-01 13:54:26,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729954590] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:26,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355416802] [2023-09-01 13:54:26,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:54:26,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:26,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:26,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:26,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:54:26,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:54:26,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:26,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355416802] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:26,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:26,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-09-01 13:54:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101476205] [2023-09-01 13:54:26,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:54:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:54:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:54:27,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:27,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 242 transitions, 2872 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:27,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:27,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:27,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:28,127 INFO L130 PetriNetUnfolder]: 2498/3791 cut-off events. [2023-09-01 13:54:28,127 INFO L131 PetriNetUnfolder]: For 32432/32444 co-relation queries the response was YES. [2023-09-01 13:54:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24540 conditions, 3791 events. 2498/3791 cut-off events. For 32432/32444 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18722 event pairs, 326 based on Foata normal form. 32/3814 useless extension candidates. Maximal degree in co-relation 24490. Up to 1487 conditions per place. [2023-09-01 13:54:28,152 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 282 selfloop transitions, 179 changer transitions 0/470 dead transitions. [2023-09-01 13:54:28,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 470 transitions, 5879 flow [2023-09-01 13:54:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:54:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:54:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2100 transitions. [2023-09-01 13:54:28,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2023-09-01 13:54:28,155 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2100 transitions. [2023-09-01 13:54:28,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2100 transitions. [2023-09-01 13:54:28,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:28,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2100 transitions. [2023-09-01 13:54:28,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 116.66666666666667) internal successors, (2100), 18 states have internal predecessors, (2100), 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 13:54:28,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 13:54:28,160 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 13:54:28,160 INFO L175 Difference]: Start difference. First operand has 137 places, 242 transitions, 2872 flow. Second operand 18 states and 2100 transitions. [2023-09-01 13:54:28,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 470 transitions, 5879 flow [2023-09-01 13:54:28,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 470 transitions, 5664 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-09-01 13:54:28,234 INFO L231 Difference]: Finished difference. Result has 155 places, 296 transitions, 3960 flow [2023-09-01 13:54:28,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3960, PETRI_PLACES=155, PETRI_TRANSITIONS=296} [2023-09-01 13:54:28,234 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2023-09-01 13:54:28,234 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 296 transitions, 3960 flow [2023-09-01 13:54:28,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:28,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:28,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:28,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 13:54:28,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 13:54:28,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1644877099, now seen corresponding path program 15 times [2023-09-01 13:54:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:28,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140988322] [2023-09-01 13:54:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:28,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:28,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140988322] [2023-09-01 13:54:28,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140988322] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:28,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073250312] [2023-09-01 13:54:28,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:54:28,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:28,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:28,561 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:28,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:54:28,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:54:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:28,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:28,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:28,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073250312] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:28,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:28,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 13:54:28,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870409031] [2023-09-01 13:54:28,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:28,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:54:28,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:28,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:54:28,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:54:29,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:29,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 296 transitions, 3960 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:29,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:29,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:29,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:29,975 INFO L130 PetriNetUnfolder]: 2548/3878 cut-off events. [2023-09-01 13:54:29,975 INFO L131 PetriNetUnfolder]: For 38879/38905 co-relation queries the response was YES. [2023-09-01 13:54:29,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26825 conditions, 3878 events. 2548/3878 cut-off events. For 38879/38905 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19365 event pairs, 520 based on Foata normal form. 44/3919 useless extension candidates. Maximal degree in co-relation 26770. Up to 1964 conditions per place. [2023-09-01 13:54:30,007 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 281 selfloop transitions, 126 changer transitions 0/416 dead transitions. [2023-09-01 13:54:30,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 416 transitions, 5984 flow [2023-09-01 13:54:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:54:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:54:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1163 transitions. [2023-09-01 13:54:30,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426007326007326 [2023-09-01 13:54:30,008 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1163 transitions. [2023-09-01 13:54:30,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1163 transitions. [2023-09-01 13:54:30,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:30,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1163 transitions. [2023-09-01 13:54:30,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.3) internal successors, (1163), 10 states have internal predecessors, (1163), 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 13:54:30,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 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 13:54:30,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 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 13:54:30,012 INFO L175 Difference]: Start difference. First operand has 155 places, 296 transitions, 3960 flow. Second operand 10 states and 1163 transitions. [2023-09-01 13:54:30,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 416 transitions, 5984 flow [2023-09-01 13:54:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 416 transitions, 5683 flow, removed 100 selfloop flow, removed 8 redundant places. [2023-09-01 13:54:30,130 INFO L231 Difference]: Finished difference. Result has 160 places, 326 transitions, 4533 flow [2023-09-01 13:54:30,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4533, PETRI_PLACES=160, PETRI_TRANSITIONS=326} [2023-09-01 13:54:30,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-09-01 13:54:30,130 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 326 transitions, 4533 flow [2023-09-01 13:54:30,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:30,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:30,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:30,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:30,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:30,336 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 13:54:30,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash -975380431, now seen corresponding path program 16 times [2023-09-01 13:54:30,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:30,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050396963] [2023-09-01 13:54:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050396963] [2023-09-01 13:54:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050396963] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313802711] [2023-09-01 13:54:30,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:54:30,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:30,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:30,485 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:30,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:54:30,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:54:30,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:54:30,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:30,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313802711] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:30,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:30,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-09-01 13:54:30,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775816294] [2023-09-01 13:54:30,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:54:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:54:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:54:31,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-09-01 13:54:31,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 326 transitions, 4533 flow. Second operand has 19 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 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 13:54:31,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:31,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-09-01 13:54:31,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:32,441 INFO L130 PetriNetUnfolder]: 2642/4011 cut-off events. [2023-09-01 13:54:32,441 INFO L131 PetriNetUnfolder]: For 40575/40575 co-relation queries the response was YES. [2023-09-01 13:54:32,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 4011 events. 2642/4011 cut-off events. For 40575/40575 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19866 event pairs, 321 based on Foata normal form. 26/4037 useless extension candidates. Maximal degree in co-relation 27869. Up to 1584 conditions per place. [2023-09-01 13:54:32,469 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 353 selfloop transitions, 244 changer transitions 0/597 dead transitions. [2023-09-01 13:54:32,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 597 transitions, 8564 flow [2023-09-01 13:54:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 13:54:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 13:54:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3429 transitions. [2023-09-01 13:54:32,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40517546969159873 [2023-09-01 13:54:32,473 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3429 transitions. [2023-09-01 13:54:32,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3429 transitions. [2023-09-01 13:54:32,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:32,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3429 transitions. [2023-09-01 13:54:32,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.61290322580645) internal successors, (3429), 31 states have internal predecessors, (3429), 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 13:54:32,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 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 13:54:32,484 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 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 13:54:32,484 INFO L175 Difference]: Start difference. First operand has 160 places, 326 transitions, 4533 flow. Second operand 31 states and 3429 transitions. [2023-09-01 13:54:32,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 597 transitions, 8564 flow [2023-09-01 13:54:32,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 597 transitions, 8395 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-09-01 13:54:32,614 INFO L231 Difference]: Finished difference. Result has 191 places, 408 transitions, 6026 flow [2023-09-01 13:54:32,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6026, PETRI_PLACES=191, PETRI_TRANSITIONS=408} [2023-09-01 13:54:32,614 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2023-09-01 13:54:32,615 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 408 transitions, 6026 flow [2023-09-01 13:54:32,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 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 13:54:32,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:32,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:32,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:32,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:32,821 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 13:54:32,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 561744499, now seen corresponding path program 17 times [2023-09-01 13:54:32,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:32,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992644622] [2023-09-01 13:54:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:32,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:32,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992644622] [2023-09-01 13:54:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992644622] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:32,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120265966] [2023-09-01 13:54:32,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:54:32,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:32,942 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:32,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:54:33,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:54:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:33,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:54:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:33,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:33,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120265966] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:33,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-09-01 13:54:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547732406] [2023-09-01 13:54:33,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:33,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:54:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:54:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:54:33,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-09-01 13:54:33,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 408 transitions, 6026 flow. Second operand has 17 states, 17 states have (on average 106.70588235294117) internal successors, (1814), 17 states have internal predecessors, (1814), 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 13:54:33,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:33,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-09-01 13:54:33,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:34,505 INFO L130 PetriNetUnfolder]: 2608/3945 cut-off events. [2023-09-01 13:54:34,505 INFO L131 PetriNetUnfolder]: For 43084/43084 co-relation queries the response was YES. [2023-09-01 13:54:34,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 3945 events. 2608/3945 cut-off events. For 43084/43084 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19312 event pairs, 345 based on Foata normal form. 26/3971 useless extension candidates. Maximal degree in co-relation 28614. Up to 1634 conditions per place. [2023-09-01 13:54:34,538 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 354 selfloop transitions, 203 changer transitions 0/557 dead transitions. [2023-09-01 13:54:34,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 557 transitions, 8646 flow [2023-09-01 13:54:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:54:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:54:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2110 transitions. [2023-09-01 13:54:34,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067861962598805 [2023-09-01 13:54:34,542 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2110 transitions. [2023-09-01 13:54:34,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2110 transitions. [2023-09-01 13:54:34,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:34,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2110 transitions. [2023-09-01 13:54:34,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.05263157894737) internal successors, (2110), 19 states have internal predecessors, (2110), 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 13:54:34,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 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 13:54:34,546 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 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 13:54:34,546 INFO L175 Difference]: Start difference. First operand has 191 places, 408 transitions, 6026 flow. Second operand 19 states and 2110 transitions. [2023-09-01 13:54:34,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 557 transitions, 8646 flow [2023-09-01 13:54:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 557 transitions, 8182 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-09-01 13:54:34,704 INFO L231 Difference]: Finished difference. Result has 204 places, 413 transitions, 6026 flow [2023-09-01 13:54:34,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6026, PETRI_PLACES=204, PETRI_TRANSITIONS=413} [2023-09-01 13:54:34,705 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-09-01 13:54:34,705 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 413 transitions, 6026 flow [2023-09-01 13:54:34,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.70588235294117) internal successors, (1814), 17 states have internal predecessors, (1814), 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 13:54:34,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:34,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:34,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:34,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:34,906 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 13:54:34,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1034602387, now seen corresponding path program 18 times [2023-09-01 13:54:34,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:34,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571394594] [2023-09-01 13:54:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:34,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571394594] [2023-09-01 13:54:35,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571394594] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583430167] [2023-09-01 13:54:35,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:54:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:35,026 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:35,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:54:35,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:54:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:35,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583430167] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:35,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 13:54:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110834825] [2023-09-01 13:54:35,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:35,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:54:35,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:54:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:54:35,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:35,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 413 transitions, 6026 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:35,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:35,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:36,620 INFO L130 PetriNetUnfolder]: 2549/3864 cut-off events. [2023-09-01 13:54:36,620 INFO L131 PetriNetUnfolder]: For 42182/42195 co-relation queries the response was YES. [2023-09-01 13:54:36,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28278 conditions, 3864 events. 2549/3864 cut-off events. For 42182/42195 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19122 event pairs, 342 based on Foata normal form. 52/3907 useless extension candidates. Maximal degree in co-relation 28212. Up to 1565 conditions per place. [2023-09-01 13:54:36,656 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 294 selfloop transitions, 229 changer transitions 0/547 dead transitions. [2023-09-01 13:54:36,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 547 transitions, 8188 flow [2023-09-01 13:54:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:54:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:54:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1757 transitions. [2023-09-01 13:54:36,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905982905982903 [2023-09-01 13:54:36,657 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1757 transitions. [2023-09-01 13:54:36,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1757 transitions. [2023-09-01 13:54:36,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:36,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1757 transitions. [2023-09-01 13:54:36,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 117.13333333333334) internal successors, (1757), 15 states have internal predecessors, (1757), 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 13:54:36,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 13:54:36,662 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 13:54:36,662 INFO L175 Difference]: Start difference. First operand has 204 places, 413 transitions, 6026 flow. Second operand 15 states and 1757 transitions. [2023-09-01 13:54:36,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 547 transitions, 8188 flow [2023-09-01 13:54:36,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 547 transitions, 7947 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-09-01 13:54:36,810 INFO L231 Difference]: Finished difference. Result has 206 places, 420 transitions, 6404 flow [2023-09-01 13:54:36,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6404, PETRI_PLACES=206, PETRI_TRANSITIONS=420} [2023-09-01 13:54:36,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2023-09-01 13:54:36,811 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 420 transitions, 6404 flow [2023-09-01 13:54:36,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 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 13:54:36,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:36,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:36,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:37,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 13:54:37,012 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 13:54:37,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash 849317859, now seen corresponding path program 19 times [2023-09-01 13:54:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:37,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055711740] [2023-09-01 13:54:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:37,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055711740] [2023-09-01 13:54:37,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055711740] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983874729] [2023-09-01 13:54:37,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:54:37,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:37,149 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:37,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:54:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:37,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:37,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:37,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983874729] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:37,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:37,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-09-01 13:54:37,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159048515] [2023-09-01 13:54:37,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:37,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:54:37,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:54:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:54:37,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:37,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 420 transitions, 6404 flow. Second operand has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 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 13:54:37,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:37,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:37,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:38,481 INFO L130 PetriNetUnfolder]: 2519/3804 cut-off events. [2023-09-01 13:54:38,481 INFO L131 PetriNetUnfolder]: For 45361/45372 co-relation queries the response was YES. [2023-09-01 13:54:38,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 3804 events. 2519/3804 cut-off events. For 45361/45372 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18595 event pairs, 406 based on Foata normal form. 26/3821 useless extension candidates. Maximal degree in co-relation 28580. Up to 1553 conditions per place. [2023-09-01 13:54:38,509 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 267 selfloop transitions, 182 changer transitions 0/473 dead transitions. [2023-09-01 13:54:38,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 473 transitions, 7759 flow [2023-09-01 13:54:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:54:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:54:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1039 transitions. [2023-09-01 13:54:38,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228734228734229 [2023-09-01 13:54:38,511 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1039 transitions. [2023-09-01 13:54:38,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1039 transitions. [2023-09-01 13:54:38,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:38,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1039 transitions. [2023-09-01 13:54:38,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.44444444444444) internal successors, (1039), 9 states have internal predecessors, (1039), 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 13:54:38,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 13:54:38,514 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 13:54:38,514 INFO L175 Difference]: Start difference. First operand has 206 places, 420 transitions, 6404 flow. Second operand 9 states and 1039 transitions. [2023-09-01 13:54:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 473 transitions, 7759 flow [2023-09-01 13:54:38,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 473 transitions, 7262 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-09-01 13:54:38,652 INFO L231 Difference]: Finished difference. Result has 201 places, 422 transitions, 6478 flow [2023-09-01 13:54:38,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6478, PETRI_PLACES=201, PETRI_TRANSITIONS=422} [2023-09-01 13:54:38,652 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2023-09-01 13:54:38,652 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 422 transitions, 6478 flow [2023-09-01 13:54:38,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 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 13:54:38,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:38,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:38,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-09-01 13:54:38,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 13:54:38,854 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 13:54:38,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash 103220131, now seen corresponding path program 20 times [2023-09-01 13:54:38,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:38,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501036947] [2023-09-01 13:54:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:38,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:38,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501036947] [2023-09-01 13:54:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501036947] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947957544] [2023-09-01 13:54:38,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:54:38,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:38,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:38,993 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:39,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:54:39,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:54:39,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:54:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:39,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:54:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947957544] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:54:39,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:54:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-09-01 13:54:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420965106] [2023-09-01 13:54:39,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:54:39,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:54:39,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:54:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:54:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:54:39,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-09-01 13:54:39,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 422 transitions, 6478 flow. Second operand has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 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 13:54:39,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:54:39,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-09-01 13:54:39,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:54:40,389 INFO L130 PetriNetUnfolder]: 2488/3741 cut-off events. [2023-09-01 13:54:40,389 INFO L131 PetriNetUnfolder]: For 47088/47095 co-relation queries the response was YES. [2023-09-01 13:54:40,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28605 conditions, 3741 events. 2488/3741 cut-off events. For 47088/47095 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18057 event pairs, 729 based on Foata normal form. 30/3762 useless extension candidates. Maximal degree in co-relation 28538. Up to 2986 conditions per place. [2023-09-01 13:54:40,422 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 342 selfloop transitions, 96 changer transitions 0/462 dead transitions. [2023-09-01 13:54:40,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 462 transitions, 7628 flow [2023-09-01 13:54:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:54:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:54:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1033 transitions. [2023-09-01 13:54:40,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42043142043142046 [2023-09-01 13:54:40,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1033 transitions. [2023-09-01 13:54:40,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1033 transitions. [2023-09-01 13:54:40,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:40,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1033 transitions. [2023-09-01 13:54:40,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.77777777777777) internal successors, (1033), 9 states have internal predecessors, (1033), 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 13:54:40,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 13:54:40,426 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 13:54:40,426 INFO L175 Difference]: Start difference. First operand has 201 places, 422 transitions, 6478 flow. Second operand 9 states and 1033 transitions. [2023-09-01 13:54:40,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 462 transitions, 7628 flow [2023-09-01 13:54:40,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 462 transitions, 7404 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-09-01 13:54:40,591 INFO L231 Difference]: Finished difference. Result has 202 places, 422 transitions, 6444 flow [2023-09-01 13:54:40,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6444, PETRI_PLACES=202, PETRI_TRANSITIONS=422} [2023-09-01 13:54:40,592 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-09-01 13:54:40,592 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 422 transitions, 6444 flow [2023-09-01 13:54:40,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 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 13:54:40,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:40,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:40,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:40,799 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 13:54:40,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 108858239, now seen corresponding path program 2 times [2023-09-01 13:54:40,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:40,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734850754] [2023-09-01 13:54:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734850754] [2023-09-01 13:54:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734850754] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828738336] [2023-09-01 13:54:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:54:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:42,249 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:42,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:54:42,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:54:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 13:54:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:42,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:54:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:42,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:54:43,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:43,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:43,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 76 [2023-09-01 13:54:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:54:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:44,095 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse5 (+ c_~A~0.offset (* 4 c_~M~0))) (.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (and (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4)) (.cse1 (select .cse3 c_~A~0.offset))) (or (<= .cse0 .cse1) (= .cse2 .cse0) (<= .cse2 c_~max1~0) (<= .cse1 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 .cse5)) (.cse6 (select .cse8 .cse4))) (or (= .cse6 .cse7) (<= .cse7 c_~max2~0) (< c_~max2~0 (select .cse8 c_~A~0.offset)) (<= .cse6 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse10 c_~A~0.offset))) (or (= c_~max1~0 .cse9) (< .cse9 (select .cse10 .cse5)) (< c_~max1~0 (select .cse10 .cse4)) (<= .cse9 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4)) (.cse11 (select .cse12 c_~A~0.offset))) (or (< .cse11 (select .cse12 .cse5)) (= .cse13 .cse11) (<= .cse13 c_~max1~0) (<= .cse11 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse15 (select .cse14 .cse4))) (or (< c_~max2~0 (select .cse14 .cse5)) (< c_~max2~0 (select .cse14 c_~A~0.offset)) (= .cse15 c_~max2~0) (<= .cse15 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse16 (select .cse17 .cse5))) (or (<= .cse16 c_~max2~0) (< c_~max2~0 (select .cse17 c_~A~0.offset)) (< c_~max1~0 (select .cse17 .cse4)) (= c_~max1~0 .cse16))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse20 c_~A~0.offset)) (.cse18 (select .cse20 .cse5))) (or (<= .cse18 .cse19) (< c_~max1~0 (select .cse20 .cse4)) (<= .cse19 c_~max2~0) (= c_~max1~0 .cse18))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse21 .cse5)) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-09-01 13:54:44,368 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4))) (.cse5 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse1 (select .cse3 c_~A~0.offset)) (.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4))) (or (<= .cse0 .cse1) (<= .cse1 c_~max2~0) (= .cse0 .cse2) (<= .cse2 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 c_~A~0.offset)) (.cse6 (select .cse8 .cse5))) (or (<= .cse6 .cse7) (<= .cse7 c_~max2~0) (= c_~max1~0 .cse6) (< c_~max1~0 (select .cse8 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse11 c_~A~0.offset)) (.cse10 (select .cse11 .cse4))) (or (= .cse9 .cse10) (<= .cse9 c_~max2~0) (< .cse9 (select .cse11 .cse5)) (<= .cse10 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4))) (or (< c_~max2~0 (select .cse12 c_~A~0.offset)) (< c_~max2~0 (select .cse12 .cse5)) (<= .cse13 c_~max1~0) (= c_~max2~0 .cse13))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse14 (select .cse15 c_~A~0.offset))) (or (<= .cse14 c_~max2~0) (= c_~max1~0 .cse14) (< .cse14 (select .cse15 .cse5)) (< c_~max1~0 (select .cse15 .cse4)))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 (select .cse16 .cse5)) (< c_~max1~0 (select .cse16 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse17 .cse4)) (.cse18 (select .cse17 .cse5))) (or (< c_~max2~0 (select .cse17 c_~A~0.offset)) (= .cse18 .cse19) (<= .cse19 c_~max1~0) (<= .cse18 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse20 (select .cse21 .cse5))) (or (= c_~max1~0 .cse20) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (<= .cse20 c_~max2~0) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-09-01 13:54:44,513 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 13:54:44,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3307 treesize of output 2934 [2023-09-01 13:54:44,633 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:44,634 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 1835 treesize of output 1826 [2023-09-01 13:54:44,712 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:44,713 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 1805 treesize of output 1766 [2023-09-01 13:54:44,804 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:44,805 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 1745 treesize of output 1714 [2023-09-01 13:54:44,900 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:44,901 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 1693 treesize of output 1688 [2023-09-01 13:54:44,995 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:44,996 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 1667 treesize of output 1665 [2023-09-01 13:54:45,094 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,095 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 1644 treesize of output 1619 [2023-09-01 13:54:45,187 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,188 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 1598 treesize of output 1604 [2023-09-01 13:54:45,293 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,294 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 1583 treesize of output 1574 [2023-09-01 13:54:45,420 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,420 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 1553 treesize of output 1518 [2023-09-01 13:54:45,537 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,538 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 1497 treesize of output 1490 [2023-09-01 13:54:45,652 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,653 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 1469 treesize of output 1471 [2023-09-01 13:54:45,772 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,773 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 1450 treesize of output 1433 [2023-09-01 13:54:45,898 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:45,899 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 1412 treesize of output 1391 [2023-09-01 13:54:46,033 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:46,034 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 1370 treesize of output 1370 [2023-09-01 13:54:46,168 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:46,169 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 1349 treesize of output 1326 [2023-09-01 13:54:46,308 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:54:46,308 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 1305 treesize of output 1304 [2023-09-01 13:58:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:58:01,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828738336] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:58:01,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:58:01,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-09-01 13:58:01,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192888386] [2023-09-01 13:58:01,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:58:01,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 13:58:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:58:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 13:58:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1207, Unknown=2, NotChecked=142, Total=1482 [2023-09-01 13:58:01,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 273 [2023-09-01 13:58:01,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 422 transitions, 6444 flow. Second operand has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 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 13:58:01,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:58:01,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 273 [2023-09-01 13:58:01,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:58:16,393 WARN L222 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 138 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:58:23,693 INFO L130 PetriNetUnfolder]: 6074/9547 cut-off events. [2023-09-01 13:58:23,693 INFO L131 PetriNetUnfolder]: For 133966/133966 co-relation queries the response was YES. [2023-09-01 13:58:23,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 9547 events. 6074/9547 cut-off events. For 133966/133966 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 59367 event pairs, 297 based on Foata normal form. 10/9557 useless extension candidates. Maximal degree in co-relation 72774. Up to 4884 conditions per place. [2023-09-01 13:58:23,769 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 767 selfloop transitions, 661 changer transitions 18/1446 dead transitions. [2023-09-01 13:58:23,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1446 transitions, 22528 flow [2023-09-01 13:58:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 13:58:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 13:58:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5102 transitions. [2023-09-01 13:58:23,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875176105945337 [2023-09-01 13:58:23,775 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5102 transitions. [2023-09-01 13:58:23,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5102 transitions. [2023-09-01 13:58:23,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:58:23,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5102 transitions. [2023-09-01 13:58:23,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 78.49230769230769) internal successors, (5102), 65 states have internal predecessors, (5102), 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 13:58:23,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 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 13:58:23,793 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 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 13:58:23,793 INFO L175 Difference]: Start difference. First operand has 202 places, 422 transitions, 6444 flow. Second operand 65 states and 5102 transitions. [2023-09-01 13:58:23,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1446 transitions, 22528 flow [2023-09-01 13:58:24,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1446 transitions, 21758 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-09-01 13:58:24,642 INFO L231 Difference]: Finished difference. Result has 286 places, 1008 transitions, 18203 flow [2023-09-01 13:58:24,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=18203, PETRI_PLACES=286, PETRI_TRANSITIONS=1008} [2023-09-01 13:58:24,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2023-09-01 13:58:24,643 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1008 transitions, 18203 flow [2023-09-01 13:58:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 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 13:58:24,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:58:24,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:58:24,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 13:58:24,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:58:24,845 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 13:58:24,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:58:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1055356433, now seen corresponding path program 3 times [2023-09-01 13:58:24,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:58:24,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333467676] [2023-09-01 13:58:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:58:24,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:58:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:58:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:58:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:58:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333467676] [2023-09-01 13:58:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333467676] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:58:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935778311] [2023-09-01 13:58:26,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:58:26,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:58:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:58:26,001 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:58:26,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 13:58:26,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:58:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:58:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 13:58:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:58:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:58:26,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:58:26,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 81 [2023-09-01 13:58:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:58:27,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:58:28,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:58:28,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 371 treesize of output 607 [2023-09-01 14:00:25,568 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:00:52,578 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:02:09,522 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:03:59,750 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:05:31,004 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:06:07,000 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Killed by 15