./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:35:57,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:35:57,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:35:57,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:35:57,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:35:57,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:35:57,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:35:57,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:35:57,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:35:57,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:35:57,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:35:57,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:35:57,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:35:57,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:35:57,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:35:57,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:35:57,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:35:57,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:35:57,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:35:57,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:35:57,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:35:57,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:35:57,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:35:57,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:35:57,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:35:57,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:35:57,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:35:57,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:35:57,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:35:57,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:35:57,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:35:57,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:35:57,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:35:57,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:35:57,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:35:57,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:35:57,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:35:57,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:35:57,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:35:57,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:35:57,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:35:57,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:35:57,680 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:35:57,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:35:57,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:35:57,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:35:57,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:35:57,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:35:57,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:35:57,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:35:57,683 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:35:57,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:35:57,684 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:35:57,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:35:57,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:35:57,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:35:57,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:35:57,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:35:57,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:35:57,685 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:35:57,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:35:57,685 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:35:57,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:35:57,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:35:57,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:35:57,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:35:57,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:35:57,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:35:57,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:35:57,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:35:57,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:35:57,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:35:57,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:35:57,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:35:57,688 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:35:57,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:35:57,688 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:35:57,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:35:57,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:35:57,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:35:57,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:35:57,983 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:35:57,983 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:35:57,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-31 03:35:58,874 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:35:59,043 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:35:59,043 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-31 03:35:59,047 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981f13f31/91abe3789ae146fba1a69f8cd13572b9/FLAGc67ba0a2c [2023-08-31 03:35:59,055 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981f13f31/91abe3789ae146fba1a69f8cd13572b9 [2023-08-31 03:35:59,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:35:59,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:35:59,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:35:59,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:35:59,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:35:59,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4672def9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59, skipping insertion in model container [2023-08-31 03:35:59,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:35:59,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:35:59,185 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-prod-cons.wvr.c[3056,3069] [2023-08-31 03:35:59,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:35:59,215 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:35:59,244 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-prod-cons.wvr.c[3056,3069] [2023-08-31 03:35:59,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:35:59,258 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:35:59,258 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:35:59,262 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:35:59,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59 WrapperNode [2023-08-31 03:35:59,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:35:59,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:35:59,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:35:59,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:35:59,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,306 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 170 [2023-08-31 03:35:59,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:35:59,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:35:59,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:35:59,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:35:59,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:35:59,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:35:59,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:35:59,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:35:59,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (1/1) ... [2023-08-31 03:35:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:35:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:59,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:35:59,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:35:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:35:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:35:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:35:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:35:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:35:59,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:35:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:35:59,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:35:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:35:59,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:35:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:35:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:35:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:35:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:35:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:35:59,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:35:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:35:59,419 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:35:59,515 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:35:59,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:35:59,774 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:35:59,820 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:35:59,820 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:35:59,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:35:59 BoogieIcfgContainer [2023-08-31 03:35:59,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:35:59,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:35:59,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:35:59,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:35:59,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:35:59" (1/3) ... [2023-08-31 03:35:59,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f1503e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:35:59, skipping insertion in model container [2023-08-31 03:35:59,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:35:59" (2/3) ... [2023-08-31 03:35:59,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f1503e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:35:59, skipping insertion in model container [2023-08-31 03:35:59,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:35:59" (3/3) ... [2023-08-31 03:35:59,827 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-31 03:35:59,832 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:35:59,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:35:59,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:35:59,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:35:59,909 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 03:35:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 148 transitions, 320 flow [2023-08-31 03:35:59,986 INFO L130 PetriNetUnfolder]: 11/145 cut-off events. [2023-08-31 03:35:59,986 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:35:59,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 11/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2023-08-31 03:35:59,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 148 transitions, 320 flow [2023-08-31 03:35:59,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 135 transitions, 288 flow [2023-08-31 03:35:59,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:36:00,010 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 135 transitions, 288 flow [2023-08-31 03:36:00,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 135 transitions, 288 flow [2023-08-31 03:36:00,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 135 transitions, 288 flow [2023-08-31 03:36:00,062 INFO L130 PetriNetUnfolder]: 11/135 cut-off events. [2023-08-31 03:36:00,065 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:36:00,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 11/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2023-08-31 03:36:00,069 INFO L119 LiptonReduction]: Number of co-enabled transitions 1082 [2023-08-31 03:36:04,059 INFO L134 LiptonReduction]: Checked pairs total: 2030 [2023-08-31 03:36:04,059 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-31 03:36:04,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:36:04,073 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;@25d20598, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:36:04,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 03:36:04,077 INFO L130 PetriNetUnfolder]: 3/24 cut-off events. [2023-08-31 03:36:04,078 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:36:04,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:04,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:04,078 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)] === [2023-08-31 03:36:04,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1050761945, now seen corresponding path program 1 times [2023-08-31 03:36:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037007208] [2023-08-31 03:36:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:04,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037007208] [2023-08-31 03:36:04,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037007208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:36:04,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:36:04,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:36:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293996177] [2023-08-31 03:36:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:36:04,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:36:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:36:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:36:04,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-08-31 03:36:04,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:04,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:04,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-08-31 03:36:04,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:04,536 INFO L130 PetriNetUnfolder]: 238/394 cut-off events. [2023-08-31 03:36:04,537 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-31 03:36:04,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 394 events. 238/394 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 14 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 687. Up to 129 conditions per place. [2023-08-31 03:36:04,540 INFO L137 encePairwiseOnDemand]: 278/283 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-08-31 03:36:04,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 230 flow [2023-08-31 03:36:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:36:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:36:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-31 03:36:04,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812720848056537 [2023-08-31 03:36:04,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-31 03:36:04,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-31 03:36:04,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:04,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-31 03:36:04,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:04,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:04,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:04,565 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 681 transitions. [2023-08-31 03:36:04,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 230 flow [2023-08-31 03:36:04,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 03:36:04,569 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2023-08-31 03:36:04,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-31 03:36:04,572 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-31 03:36:04,573 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2023-08-31 03:36:04,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:04,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:04,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:04,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:36:04,574 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)] === [2023-08-31 03:36:04,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash 982828987, now seen corresponding path program 2 times [2023-08-31 03:36:04,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:04,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708775692] [2023-08-31 03:36:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:04,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:04,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708775692] [2023-08-31 03:36:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708775692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:36:04,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:36:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:36:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261187402] [2023-08-31 03:36:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:36:04,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 03:36:04,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:04,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 03:36:04,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 03:36:04,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 283 [2023-08-31 03:36:04,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:04,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:04,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 283 [2023-08-31 03:36:04,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:05,085 INFO L130 PetriNetUnfolder]: 530/812 cut-off events. [2023-08-31 03:36:05,085 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-08-31 03:36:05,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 812 events. 530/812 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3315 event pairs, 36 based on Foata normal form. 20/715 useless extension candidates. Maximal degree in co-relation 705. Up to 298 conditions per place. [2023-08-31 03:36:05,093 INFO L137 encePairwiseOnDemand]: 276/283 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-08-31 03:36:05,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 300 flow [2023-08-31 03:36:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 03:36:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 03:36:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 918 transitions. [2023-08-31 03:36:05,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634023220595659 [2023-08-31 03:36:05,097 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 918 transitions. [2023-08-31 03:36:05,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 918 transitions. [2023-08-31 03:36:05,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:05,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 918 transitions. [2023-08-31 03:36:05,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.14285714285714) internal successors, (918), 7 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,103 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,103 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 918 transitions. [2023-08-31 03:36:05,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 300 flow [2023-08-31 03:36:05,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:36:05,116 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2023-08-31 03:36:05,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-31 03:36:05,117 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-31 03:36:05,118 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2023-08-31 03:36:05,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:05,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:05,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:36:05,119 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)] === [2023-08-31 03:36:05,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:05,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1712825980, now seen corresponding path program 1 times [2023-08-31 03:36:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:05,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963235158] [2023-08-31 03:36:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:05,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:05,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963235158] [2023-08-31 03:36:05,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963235158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:36:05,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:36:05,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:36:05,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742000498] [2023-08-31 03:36:05,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:36:05,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:36:05,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:36:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:36:05,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-08-31 03:36:05,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:05,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-08-31 03:36:05,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:05,287 INFO L130 PetriNetUnfolder]: 205/384 cut-off events. [2023-08-31 03:36:05,288 INFO L131 PetriNetUnfolder]: For 483/483 co-relation queries the response was YES. [2023-08-31 03:36:05,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 384 events. 205/384 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1426 event pairs, 87 based on Foata normal form. 14/354 useless extension candidates. Maximal degree in co-relation 662. Up to 264 conditions per place. [2023-08-31 03:36:05,290 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 28 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-08-31 03:36:05,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 196 flow [2023-08-31 03:36:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:36:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:36:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-31 03:36:05,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48527679623085984 [2023-08-31 03:36:05,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-31 03:36:05,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-31 03:36:05,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:05,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-31 03:36:05,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,297 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 412 transitions. [2023-08-31 03:36:05,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 196 flow [2023-08-31 03:36:05,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 174 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-31 03:36:05,300 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2023-08-31 03:36:05,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-31 03:36:05,301 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-31 03:36:05,301 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2023-08-31 03:36:05,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:05,302 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] [2023-08-31 03:36:05,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:36:05,302 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)] === [2023-08-31 03:36:05,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1306821357, now seen corresponding path program 1 times [2023-08-31 03:36:05,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:05,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743917429] [2023-08-31 03:36:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:36:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743917429] [2023-08-31 03:36:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743917429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:36:05,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:36:05,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:36:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139343428] [2023-08-31 03:36:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:36:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:36:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:36:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:36:05,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-08-31 03:36:05,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:05,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-08-31 03:36:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:05,539 INFO L130 PetriNetUnfolder]: 234/450 cut-off events. [2023-08-31 03:36:05,540 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2023-08-31 03:36:05,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 450 events. 234/450 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1779 event pairs, 187 based on Foata normal form. 10/402 useless extension candidates. Maximal degree in co-relation 746. Up to 330 conditions per place. [2023-08-31 03:36:05,543 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 22 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2023-08-31 03:36:05,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 197 flow [2023-08-31 03:36:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:36:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:36:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-31 03:36:05,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47703180212014135 [2023-08-31 03:36:05,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-31 03:36:05,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-31 03:36:05,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:05,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-31 03:36:05,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,550 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,551 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 540 transitions. [2023-08-31 03:36:05,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 197 flow [2023-08-31 03:36:05,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:36:05,553 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2023-08-31 03:36:05,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-31 03:36:05,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-08-31 03:36:05,554 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2023-08-31 03:36:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:05,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:05,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 03:36:05,555 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)] === [2023-08-31 03:36:05,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash -372538144, now seen corresponding path program 1 times [2023-08-31 03:36:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255034239] [2023-08-31 03:36:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:06,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255034239] [2023-08-31 03:36:06,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255034239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889329288] [2023-08-31 03:36:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:06,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:06,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:36:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:06,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 03:36:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:06,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:36:06,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:36:06,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:36:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:36:06,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:36:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:07,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:07,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:07,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-08-31 03:36:07,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:07,587 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 484 treesize of output 460 [2023-08-31 03:36:07,614 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 152 treesize of output 128 [2023-08-31 03:36:07,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:07,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 122 [2023-08-31 03:36:07,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:07,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2023-08-31 03:36:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:07,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889329288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:07,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:07,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-08-31 03:36:07,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61821535] [2023-08-31 03:36:07,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:07,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:36:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:07,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:36:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1037, Unknown=4, NotChecked=0, Total=1190 [2023-08-31 03:36:08,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-31 03:36:08,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 35 states, 35 states have (on average 73.8) internal successors, (2583), 35 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:08,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:08,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-31 03:36:08,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:10,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:36:12,068 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~v_assert~0 1) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-31 03:36:15,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:36:15,143 WARN L839 $PredicateComparison]: unable to prove that (and (<= 1 |c_thread2Thread1of1ForFork0_~cond~1#1|) (<= c_~v_assert~0 1) (<= |c_thread2Thread1of1ForFork0_~cond~1#1| 1) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-31 03:36:15,596 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~W~0 1))) (and (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) (< c_~back~0 0)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) is different from false [2023-08-31 03:36:17,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:36:20,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:36:20,639 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~v_assert~0 256)) (.cse2 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse3 (+ c_~W~0 1))) (and (< 0 .cse0) (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= .cse0 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse1 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse2)) .cse3)))) (< c_~back~0 0)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse2)) .cse3)))) is different from false [2023-08-31 03:36:21,226 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~v_assert~0 256)) (.cse2 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse3 (+ c_~W~0 1))) (and (< 0 .cse0) (< 0 (mod |c_thread2Thread1of1ForFork0_~cond~1#1| 256)) (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= .cse0 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse1 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse2)) .cse3)))) (< c_~back~0 0)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse2)) .cse3)))) is different from false [2023-08-31 03:36:23,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:36:25,087 INFO L130 PetriNetUnfolder]: 2559/4320 cut-off events. [2023-08-31 03:36:25,087 INFO L131 PetriNetUnfolder]: For 2429/2429 co-relation queries the response was YES. [2023-08-31 03:36:25,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 4320 events. 2559/4320 cut-off events. For 2429/2429 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 25669 event pairs, 62 based on Foata normal form. 49/4002 useless extension candidates. Maximal degree in co-relation 11450. Up to 890 conditions per place. [2023-08-31 03:36:25,104 INFO L137 encePairwiseOnDemand]: 263/283 looper letters, 416 selfloop transitions, 240 changer transitions 115/771 dead transitions. [2023-08-31 03:36:25,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 771 transitions, 3862 flow [2023-08-31 03:36:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-08-31 03:36:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-08-31 03:36:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 8250 transitions. [2023-08-31 03:36:25,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.280307148681707 [2023-08-31 03:36:25,121 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 8250 transitions. [2023-08-31 03:36:25,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 8250 transitions. [2023-08-31 03:36:25,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:25,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 8250 transitions. [2023-08-31 03:36:25,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 79.32692307692308) internal successors, (8250), 104 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:25,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 283.0) internal successors, (29715), 105 states have internal predecessors, (29715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:25,205 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 283.0) internal successors, (29715), 105 states have internal predecessors, (29715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:25,206 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 104 states and 8250 transitions. [2023-08-31 03:36:25,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 771 transitions, 3862 flow [2023-08-31 03:36:25,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 771 transitions, 3834 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-31 03:36:25,220 INFO L231 Difference]: Finished difference. Result has 203 places, 291 transitions, 2053 flow [2023-08-31 03:36:25,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=2053, PETRI_PLACES=203, PETRI_TRANSITIONS=291} [2023-08-31 03:36:25,222 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 171 predicate places. [2023-08-31 03:36:25,222 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 291 transitions, 2053 flow [2023-08-31 03:36:25,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.8) internal successors, (2583), 35 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:25,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:25,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:25,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:36:25,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:25,428 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)] === [2023-08-31 03:36:25,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1336769804, now seen corresponding path program 2 times [2023-08-31 03:36:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:25,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378244585] [2023-08-31 03:36:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:25,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378244585] [2023-08-31 03:36:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378244585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362779957] [2023-08-31 03:36:26,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:36:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:26,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:26,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:36:26,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:36:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:36:26,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-31 03:36:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:26,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:36:26,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:36:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:36:26,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 03:36:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:36:26,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 03:36:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:26,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:26,880 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_178 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_178) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) is different from false [2023-08-31 03:36:26,888 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_178) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) is different from false [2023-08-31 03:36:27,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:27,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-31 03:36:27,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:27,126 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 192 treesize of output 184 [2023-08-31 03:36:27,141 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 152 treesize of output 128 [2023-08-31 03:36:27,149 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 128 treesize of output 116 [2023-08-31 03:36:27,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:27,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 81 [2023-08-31 03:36:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:27,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362779957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:27,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:27,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-08-31 03:36:27,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62020317] [2023-08-31 03:36:27,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:27,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:36:27,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:27,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:36:27,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=922, Unknown=5, NotChecked=126, Total=1190 [2023-08-31 03:36:27,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-31 03:36:27,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 291 transitions, 2053 flow. Second operand has 35 states, 35 states have (on average 73.88571428571429) internal successors, (2586), 35 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) [2023-08-31 03:36:27,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:27,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-31 03:36:27,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:28,589 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~v_assert~0 1) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_178) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) (<= 1 c_~v_assert~0)) is different from false [2023-08-31 03:36:34,309 INFO L130 PetriNetUnfolder]: 3454/5899 cut-off events. [2023-08-31 03:36:34,309 INFO L131 PetriNetUnfolder]: For 226912/226912 co-relation queries the response was YES. [2023-08-31 03:36:34,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41019 conditions, 5899 events. 3454/5899 cut-off events. For 226912/226912 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 37529 event pairs, 314 based on Foata normal form. 64/5956 useless extension candidates. Maximal degree in co-relation 40492. Up to 1599 conditions per place. [2023-08-31 03:36:34,364 INFO L137 encePairwiseOnDemand]: 268/283 looper letters, 420 selfloop transitions, 284 changer transitions 127/831 dead transitions. [2023-08-31 03:36:34,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 831 transitions, 9782 flow [2023-08-31 03:36:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-31 03:36:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-31 03:36:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5389 transitions. [2023-08-31 03:36:34,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28003533568904593 [2023-08-31 03:36:34,370 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5389 transitions. [2023-08-31 03:36:34,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5389 transitions. [2023-08-31 03:36:34,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:34,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5389 transitions. [2023-08-31 03:36:34,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 79.25) internal successors, (5389), 68 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:34,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 283.0) internal successors, (19527), 69 states have internal predecessors, (19527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:34,393 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 283.0) internal successors, (19527), 69 states have internal predecessors, (19527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:34,393 INFO L175 Difference]: Start difference. First operand has 203 places, 291 transitions, 2053 flow. Second operand 68 states and 5389 transitions. [2023-08-31 03:36:34,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 831 transitions, 9782 flow [2023-08-31 03:36:34,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 831 transitions, 9388 flow, removed 153 selfloop flow, removed 8 redundant places. [2023-08-31 03:36:34,598 INFO L231 Difference]: Finished difference. Result has 276 places, 437 transitions, 4267 flow [2023-08-31 03:36:34,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4267, PETRI_PLACES=276, PETRI_TRANSITIONS=437} [2023-08-31 03:36:34,599 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 244 predicate places. [2023-08-31 03:36:34,599 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 437 transitions, 4267 flow [2023-08-31 03:36:34,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.88571428571429) internal successors, (2586), 35 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) [2023-08-31 03:36:34,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:34,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:34,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 03:36:34,805 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,SelfDestructingSolverStorable5 [2023-08-31 03:36:34,805 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)] === [2023-08-31 03:36:34,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1696414361, now seen corresponding path program 3 times [2023-08-31 03:36:34,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:34,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65343228] [2023-08-31 03:36:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:34,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:35,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65343228] [2023-08-31 03:36:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65343228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766323317] [2023-08-31 03:36:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:36:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:35,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:35,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:36:35,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:36:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:36:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 03:36:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:36:35,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:35,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:35,946 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 28 treesize of output 20 [2023-08-31 03:36:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:36:36,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766323317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:36,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:36,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2023-08-31 03:36:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987151776] [2023-08-31 03:36:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:36,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:36:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:36:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:36:36,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 283 [2023-08-31 03:36:36,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 437 transitions, 4267 flow. Second operand has 28 states, 28 states have (on average 101.42857142857143) internal successors, (2840), 28 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:36,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:36,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 283 [2023-08-31 03:36:36,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:40,146 INFO L130 PetriNetUnfolder]: 4686/8064 cut-off events. [2023-08-31 03:36:40,146 INFO L131 PetriNetUnfolder]: For 385426/385426 co-relation queries the response was YES. [2023-08-31 03:36:40,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65303 conditions, 8064 events. 4686/8064 cut-off events. For 385426/385426 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 55925 event pairs, 335 based on Foata normal form. 36/8099 useless extension candidates. Maximal degree in co-relation 65116. Up to 2004 conditions per place. [2023-08-31 03:36:40,230 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 487 selfloop transitions, 548 changer transitions 74/1109 dead transitions. [2023-08-31 03:36:40,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1109 transitions, 15323 flow [2023-08-31 03:36:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-31 03:36:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-31 03:36:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5061 transitions. [2023-08-31 03:36:40,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37257067137809186 [2023-08-31 03:36:40,236 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5061 transitions. [2023-08-31 03:36:40,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5061 transitions. [2023-08-31 03:36:40,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:40,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5061 transitions. [2023-08-31 03:36:40,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 105.4375) internal successors, (5061), 48 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:40,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:40,253 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:40,253 INFO L175 Difference]: Start difference. First operand has 276 places, 437 transitions, 4267 flow. Second operand 48 states and 5061 transitions. [2023-08-31 03:36:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1109 transitions, 15323 flow [2023-08-31 03:36:40,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1109 transitions, 14324 flow, removed 384 selfloop flow, removed 28 redundant places. [2023-08-31 03:36:40,948 INFO L231 Difference]: Finished difference. Result has 301 places, 734 transitions, 8871 flow [2023-08-31 03:36:40,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8871, PETRI_PLACES=301, PETRI_TRANSITIONS=734} [2023-08-31 03:36:40,949 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2023-08-31 03:36:40,949 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 734 transitions, 8871 flow [2023-08-31 03:36:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.42857142857143) internal successors, (2840), 28 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:40,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:40,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:40,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:36:41,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:41,155 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)] === [2023-08-31 03:36:41,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash -91294103, now seen corresponding path program 4 times [2023-08-31 03:36:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176712961] [2023-08-31 03:36:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:41,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:41,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176712961] [2023-08-31 03:36:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176712961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064436980] [2023-08-31 03:36:41,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:36:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:41,918 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:41,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:36:41,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:36:41,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:36:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 03:36:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:36:42,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:36:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:36:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:42,485 WARN L839 $PredicateComparison]: unable to prove that (or (= (mod c_~v_assert~0 256) 0) (forall ((v_ArrVal_275 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_275) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) (+ c_~W~0 1)))) is different from false [2023-08-31 03:36:42,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:42,496 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 50 treesize of output 42 [2023-08-31 03:36:42,507 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 13 treesize of output 7 [2023-08-31 03:36:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:36:42,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064436980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:42,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:42,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2023-08-31 03:36:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075473789] [2023-08-31 03:36:42,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:36:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:36:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=983, Unknown=1, NotChecked=64, Total=1190 [2023-08-31 03:36:42,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 283 [2023-08-31 03:36:42,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 734 transitions, 8871 flow. Second operand has 35 states, 35 states have (on average 79.8) internal successors, (2793), 35 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:42,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:42,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 283 [2023-08-31 03:36:42,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:47,398 INFO L130 PetriNetUnfolder]: 5381/9287 cut-off events. [2023-08-31 03:36:47,398 INFO L131 PetriNetUnfolder]: For 531682/531682 co-relation queries the response was YES. [2023-08-31 03:36:47,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81314 conditions, 9287 events. 5381/9287 cut-off events. For 531682/531682 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 65282 event pairs, 340 based on Foata normal form. 32/9319 useless extension candidates. Maximal degree in co-relation 80936. Up to 2342 conditions per place. [2023-08-31 03:36:47,513 INFO L137 encePairwiseOnDemand]: 268/283 looper letters, 521 selfloop transitions, 645 changer transitions 66/1232 dead transitions. [2023-08-31 03:36:47,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1232 transitions, 18721 flow [2023-08-31 03:36:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-31 03:36:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-31 03:36:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4211 transitions. [2023-08-31 03:36:47,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2975971731448763 [2023-08-31 03:36:47,519 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4211 transitions. [2023-08-31 03:36:47,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4211 transitions. [2023-08-31 03:36:47,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:47,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4211 transitions. [2023-08-31 03:36:47,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 84.22) internal successors, (4211), 50 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:47,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 283.0) internal successors, (14433), 51 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:47,535 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 283.0) internal successors, (14433), 51 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:47,535 INFO L175 Difference]: Start difference. First operand has 301 places, 734 transitions, 8871 flow. Second operand 50 states and 4211 transitions. [2023-08-31 03:36:47,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1232 transitions, 18721 flow [2023-08-31 03:36:48,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1232 transitions, 17551 flow, removed 369 selfloop flow, removed 15 redundant places. [2023-08-31 03:36:48,912 INFO L231 Difference]: Finished difference. Result has 340 places, 866 transitions, 11221 flow [2023-08-31 03:36:48,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=7906, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=11221, PETRI_PLACES=340, PETRI_TRANSITIONS=866} [2023-08-31 03:36:48,913 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 308 predicate places. [2023-08-31 03:36:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 866 transitions, 11221 flow [2023-08-31 03:36:48,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.8) internal successors, (2793), 35 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:48,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:48,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:48,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:36:49,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:49,122 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)] === [2023-08-31 03:36:49,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -739466827, now seen corresponding path program 5 times [2023-08-31 03:36:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378456113] [2023-08-31 03:36:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378456113] [2023-08-31 03:36:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378456113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:49,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902962897] [2023-08-31 03:36:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:36:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:49,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:49,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:36:49,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:36:49,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:36:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 03:36:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:36:50,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:36:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:36:50,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:36:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:36:50,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:50,568 WARN L839 $PredicateComparison]: unable to prove that (or (= (mod c_~v_assert~0 256) 0) (forall ((v_ArrVal_325 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_325) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-31 03:36:50,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:36:50,626 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 190 treesize of output 174 [2023-08-31 03:36:50,633 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 35 treesize of output 29 [2023-08-31 03:36:50,637 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 36 treesize of output 24 [2023-08-31 03:36:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:36:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902962897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:50,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:50,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2023-08-31 03:36:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29161356] [2023-08-31 03:36:50,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 03:36:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 03:36:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1097, Unknown=12, NotChecked=68, Total=1332 [2023-08-31 03:36:50,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 283 [2023-08-31 03:36:50,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 866 transitions, 11221 flow. Second operand has 37 states, 37 states have (on average 76.78378378378379) internal successors, (2841), 37 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:50,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:50,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 283 [2023-08-31 03:36:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:37:00,475 INFO L130 PetriNetUnfolder]: 6051/10439 cut-off events. [2023-08-31 03:37:00,475 INFO L131 PetriNetUnfolder]: For 587458/587458 co-relation queries the response was YES. [2023-08-31 03:37:00,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93679 conditions, 10439 events. 6051/10439 cut-off events. For 587458/587458 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74515 event pairs, 330 based on Foata normal form. 32/10471 useless extension candidates. Maximal degree in co-relation 93022. Up to 2644 conditions per place. [2023-08-31 03:37:00,592 INFO L137 encePairwiseOnDemand]: 269/283 looper letters, 531 selfloop transitions, 728 changer transitions 62/1321 dead transitions. [2023-08-31 03:37:00,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1321 transitions, 21212 flow [2023-08-31 03:37:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-31 03:37:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-31 03:37:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3896 transitions. [2023-08-31 03:37:00,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2868080094228504 [2023-08-31 03:37:00,605 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3896 transitions. [2023-08-31 03:37:00,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3896 transitions. [2023-08-31 03:37:00,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:37:00,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3896 transitions. [2023-08-31 03:37:00,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 81.16666666666667) internal successors, (3896), 48 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:00,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:00,634 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:00,634 INFO L175 Difference]: Start difference. First operand has 340 places, 866 transitions, 11221 flow. Second operand 48 states and 3896 transitions. [2023-08-31 03:37:00,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1321 transitions, 21212 flow [2023-08-31 03:37:02,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1321 transitions, 19895 flow, removed 107 selfloop flow, removed 32 redundant places. [2023-08-31 03:37:02,371 INFO L231 Difference]: Finished difference. Result has 360 places, 947 transitions, 13093 flow [2023-08-31 03:37:02,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=10133, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=13093, PETRI_PLACES=360, PETRI_TRANSITIONS=947} [2023-08-31 03:37:02,372 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 328 predicate places. [2023-08-31 03:37:02,372 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 947 transitions, 13093 flow [2023-08-31 03:37:02,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.78378378378379) internal successors, (2841), 37 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:02,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:37:02,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:37:02,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:37:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:37:02,574 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)] === [2023-08-31 03:37:02,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:37:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash 222217251, now seen corresponding path program 6 times [2023-08-31 03:37:02,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:37:02,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933017119] [2023-08-31 03:37:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:37:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:37:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:37:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:37:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:37:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933017119] [2023-08-31 03:37:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933017119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:37:02,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:37:02,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:37:02,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401213511] [2023-08-31 03:37:02,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:37:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:37:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:37:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:37:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:37:02,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-31 03:37:02,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 947 transitions, 13093 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:02,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:37:02,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-31 03:37:02,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:37:06,917 INFO L130 PetriNetUnfolder]: 7770/15076 cut-off events. [2023-08-31 03:37:06,917 INFO L131 PetriNetUnfolder]: For 923293/924423 co-relation queries the response was YES. [2023-08-31 03:37:07,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140957 conditions, 15076 events. 7770/15076 cut-off events. For 923293/924423 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 133329 event pairs, 1493 based on Foata normal form. 795/15544 useless extension candidates. Maximal degree in co-relation 140167. Up to 6201 conditions per place. [2023-08-31 03:37:07,110 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 805 selfloop transitions, 113 changer transitions 185/1308 dead transitions. [2023-08-31 03:37:07,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1308 transitions, 20326 flow [2023-08-31 03:37:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:37:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:37:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 570 transitions. [2023-08-31 03:37:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035335689045937 [2023-08-31 03:37:07,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 570 transitions. [2023-08-31 03:37:07,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 570 transitions. [2023-08-31 03:37:07,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:37:07,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 570 transitions. [2023-08-31 03:37:07,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:07,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:07,114 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:07,114 INFO L175 Difference]: Start difference. First operand has 360 places, 947 transitions, 13093 flow. Second operand 4 states and 570 transitions. [2023-08-31 03:37:07,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1308 transitions, 20326 flow [2023-08-31 03:37:09,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1308 transitions, 19292 flow, removed 42 selfloop flow, removed 33 redundant places. [2023-08-31 03:37:09,597 INFO L231 Difference]: Finished difference. Result has 332 places, 916 transitions, 12379 flow [2023-08-31 03:37:09,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=12171, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=12379, PETRI_PLACES=332, PETRI_TRANSITIONS=916} [2023-08-31 03:37:09,598 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 300 predicate places. [2023-08-31 03:37:09,598 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 916 transitions, 12379 flow [2023-08-31 03:37:09,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:09,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:37:09,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:37:09,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 03:37:09,599 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)] === [2023-08-31 03:37:09,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:37:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1636994766, now seen corresponding path program 7 times [2023-08-31 03:37:09,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:37:09,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780594276] [2023-08-31 03:37:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:37:09,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:37:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:37:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 03:37:09,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:37:09,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780594276] [2023-08-31 03:37:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780594276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:37:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938911099] [2023-08-31 03:37:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:37:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:37:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:37:09,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:37:09,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:37:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:37:09,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:37:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:37:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 03:37:09,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:37:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 03:37:09,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938911099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:37:09,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:37:09,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 03:37:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740174524] [2023-08-31 03:37:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:37:09,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:37:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:37:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:37:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:37:09,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 283 [2023-08-31 03:37:09,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 916 transitions, 12379 flow. Second operand has 12 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:09,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:37:09,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 283 [2023-08-31 03:37:09,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:37:13,143 INFO L130 PetriNetUnfolder]: 6526/12736 cut-off events. [2023-08-31 03:37:13,143 INFO L131 PetriNetUnfolder]: For 789160/790123 co-relation queries the response was YES. [2023-08-31 03:37:13,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120201 conditions, 12736 events. 6526/12736 cut-off events. For 789160/790123 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 108560 event pairs, 3081 based on Foata normal form. 201/12693 useless extension candidates. Maximal degree in co-relation 120099. Up to 10264 conditions per place. [2023-08-31 03:37:13,334 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 622 selfloop transitions, 3 changer transitions 42/835 dead transitions. [2023-08-31 03:37:13,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 835 transitions, 12816 flow [2023-08-31 03:37:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:37:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:37:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 778 transitions. [2023-08-31 03:37:13,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581861012956419 [2023-08-31 03:37:13,336 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 778 transitions. [2023-08-31 03:37:13,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 778 transitions. [2023-08-31 03:37:13,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:37:13,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 778 transitions. [2023-08-31 03:37:13,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:13,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:13,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:13,339 INFO L175 Difference]: Start difference. First operand has 332 places, 916 transitions, 12379 flow. Second operand 6 states and 778 transitions. [2023-08-31 03:37:13,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 835 transitions, 12816 flow [2023-08-31 03:37:15,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 835 transitions, 12600 flow, removed 104 selfloop flow, removed 13 redundant places. [2023-08-31 03:37:15,400 INFO L231 Difference]: Finished difference. Result has 301 places, 793 transitions, 10712 flow [2023-08-31 03:37:15,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=11000, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10712, PETRI_PLACES=301, PETRI_TRANSITIONS=793} [2023-08-31 03:37:15,401 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2023-08-31 03:37:15,401 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 793 transitions, 10712 flow [2023-08-31 03:37:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:15,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:37:15,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:37:15,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:37:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:37:15,605 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)] === [2023-08-31 03:37:15,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:37:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1093443589, now seen corresponding path program 8 times [2023-08-31 03:37:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:37:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349859416] [2023-08-31 03:37:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:37:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:37:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:37:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:37:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:37:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349859416] [2023-08-31 03:37:16,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349859416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:37:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885636156] [2023-08-31 03:37:16,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:37:16,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:37:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:37:16,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:37:16,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:37:16,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:37:16,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:37:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-31 03:37:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:37:16,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-31 03:37:16,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:37:16,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:37:16,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:37:16,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:37:17,228 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-31 03:37:17,229 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 35 treesize of output 13 [2023-08-31 03:37:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:37:17,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:37:18,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:37:18,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 109 [2023-08-31 03:37:18,275 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:37:18,275 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 4450 treesize of output 4222 [2023-08-31 03:37:18,325 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:37:18,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:37:18,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 387 treesize of output 398 [2023-08-31 03:37:18,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:37:18,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:37:18,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 362 treesize of output 348 [2023-08-31 03:37:18,454 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:37:18,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 299 [2023-08-31 03:37:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:37:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885636156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:37:22,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:37:22,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 47 [2023-08-31 03:37:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30168539] [2023-08-31 03:37:22,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:37:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-31 03:37:22,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:37:22,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-31 03:37:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1972, Unknown=7, NotChecked=0, Total=2256 [2023-08-31 03:37:23,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-31 03:37:23,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 793 transitions, 10712 flow. Second operand has 48 states, 48 states have (on average 73.77083333333333) internal successors, (3541), 48 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:23,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:37:23,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-31 03:37:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:37:27,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:29,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:31,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:37,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:43,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:50,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:53,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:55,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:37:58,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:38:02,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 03:38:08,911 INFO L130 PetriNetUnfolder]: 13804/24286 cut-off events. [2023-08-31 03:38:08,911 INFO L131 PetriNetUnfolder]: For 1014786/1014786 co-relation queries the response was YES. [2023-08-31 03:38:09,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208715 conditions, 24286 events. 13804/24286 cut-off events. For 1014786/1014786 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 200493 event pairs, 1457 based on Foata normal form. 56/24342 useless extension candidates. Maximal degree in co-relation 208624. Up to 8543 conditions per place. [2023-08-31 03:38:09,163 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 801 selfloop transitions, 1343 changer transitions 185/2329 dead transitions. [2023-08-31 03:38:09,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 2329 transitions, 36615 flow [2023-08-31 03:38:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-31 03:38:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-08-31 03:38:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 8849 transitions. [2023-08-31 03:38:09,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27918349318526 [2023-08-31 03:38:09,170 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 8849 transitions. [2023-08-31 03:38:09,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 8849 transitions. [2023-08-31 03:38:09,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:09,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 8849 transitions. [2023-08-31 03:38:09,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 79.00892857142857) internal successors, (8849), 112 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:09,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 283.0) internal successors, (31979), 113 states have internal predecessors, (31979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:09,199 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 283.0) internal successors, (31979), 113 states have internal predecessors, (31979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:09,199 INFO L175 Difference]: Start difference. First operand has 301 places, 793 transitions, 10712 flow. Second operand 112 states and 8849 transitions. [2023-08-31 03:38:09,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 2329 transitions, 36615 flow [2023-08-31 03:38:13,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 2329 transitions, 36127 flow, removed 241 selfloop flow, removed 12 redundant places. [2023-08-31 03:38:13,281 INFO L231 Difference]: Finished difference. Result has 421 places, 1616 transitions, 28823 flow [2023-08-31 03:38:13,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=10676, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=28823, PETRI_PLACES=421, PETRI_TRANSITIONS=1616} [2023-08-31 03:38:13,283 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 389 predicate places. [2023-08-31 03:38:13,283 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1616 transitions, 28823 flow [2023-08-31 03:38:13,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 73.77083333333333) internal successors, (3541), 48 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:13,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:13,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:38:13,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:38:13,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:13,484 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)] === [2023-08-31 03:38:13,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2127871843, now seen corresponding path program 9 times [2023-08-31 03:38:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:13,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675689379] [2023-08-31 03:38:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675689379] [2023-08-31 03:38:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675689379] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813689902] [2023-08-31 03:38:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:38:14,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:14,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:14,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:14,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:38:14,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:38:14,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:38:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 03:38:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:14,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:38:14,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:38:14,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:38:15,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:38:15,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:38:15,440 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-31 03:38:15,441 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 35 treesize of output 13 [2023-08-31 03:38:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:15,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:38:16,619 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-31 03:38:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 113 [2023-08-31 03:38:16,700 INFO L321 Elim1Store]: treesize reduction 8, result has 89.9 percent of original size [2023-08-31 03:38:16,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 8947 treesize of output 8481 [2023-08-31 03:38:16,810 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:38:16,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:38:16,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 387 treesize of output 398 [2023-08-31 03:38:16,849 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:38:16,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:38:16,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 362 treesize of output 348 [2023-08-31 03:38:16,921 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:38:16,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 299 [2023-08-31 03:38:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:19,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813689902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:38:19,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:38:19,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2023-08-31 03:38:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545843247] [2023-08-31 03:38:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:38:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-31 03:38:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-31 03:38:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2175, Unknown=4, NotChecked=0, Total=2450 [2023-08-31 03:38:19,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-31 03:38:19,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1616 transitions, 28823 flow. Second operand has 50 states, 50 states have (on average 73.62) internal successors, (3681), 50 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:19,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:19,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-31 03:38:19,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:26,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:38:33,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:38:36,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:38:41,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:38:43,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:38:47,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:08,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:11,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:20,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:22,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:25,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:27,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:32,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:37,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:48,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:39:55,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:40:08,037 INFO L130 PetriNetUnfolder]: 49124/86303 cut-off events. [2023-08-31 03:40:08,037 INFO L131 PetriNetUnfolder]: For 4814067/4814067 co-relation queries the response was YES. [2023-08-31 03:40:09,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830668 conditions, 86303 events. 49124/86303 cut-off events. For 4814067/4814067 co-relation queries the response was YES. Maximal size of possible extension queue 2467. Compared 809936 event pairs, 4668 based on Foata normal form. 2790/89093 useless extension candidates. Maximal degree in co-relation 830546. Up to 22036 conditions per place. [2023-08-31 03:40:09,994 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 2173 selfloop transitions, 3249 changer transitions 2344/7766 dead transitions. [2023-08-31 03:40:09,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 7766 transitions, 142956 flow [2023-08-31 03:40:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2023-08-31 03:40:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2023-08-31 03:40:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 20807 transitions. [2023-08-31 03:40:10,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28169719616045924 [2023-08-31 03:40:10,011 INFO L72 ComplementDD]: Start complementDD. Operand 261 states and 20807 transitions. [2023-08-31 03:40:10,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 261 states and 20807 transitions. [2023-08-31 03:40:10,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:40:10,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 261 states and 20807 transitions. [2023-08-31 03:40:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 262 states, 261 states have (on average 79.72030651340997) internal successors, (20807), 261 states have internal predecessors, (20807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:10,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 262 states, 262 states have (on average 283.0) internal successors, (74146), 262 states have internal predecessors, (74146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:10,086 INFO L81 ComplementDD]: Finished complementDD. Result has 262 states, 262 states have (on average 283.0) internal successors, (74146), 262 states have internal predecessors, (74146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:10,086 INFO L175 Difference]: Start difference. First operand has 421 places, 1616 transitions, 28823 flow. Second operand 261 states and 20807 transitions. [2023-08-31 03:40:10,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 7766 transitions, 142956 flow [2023-08-31 03:41:24,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 7766 transitions, 123640 flow, removed 5628 selfloop flow, removed 29 redundant places. [2023-08-31 03:41:24,618 INFO L231 Difference]: Finished difference. Result has 748 places, 4214 transitions, 76681 flow [2023-08-31 03:41:24,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=21180, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=977, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=261, PETRI_FLOW=76681, PETRI_PLACES=748, PETRI_TRANSITIONS=4214} [2023-08-31 03:41:24,619 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 716 predicate places. [2023-08-31 03:41:24,619 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4214 transitions, 76681 flow [2023-08-31 03:41:24,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 73.62) internal successors, (3681), 50 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:24,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:24,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:24,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:24,828 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,SelfDestructingSolverStorable12 [2023-08-31 03:41:24,831 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)] === [2023-08-31 03:41:24,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1542712851, now seen corresponding path program 10 times [2023-08-31 03:41:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089570264] [2023-08-31 03:41:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:25,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089570264] [2023-08-31 03:41:25,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089570264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380873094] [2023-08-31 03:41:25,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:41:25,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:25,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:25,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:41:25,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:41:25,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:25,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-31 03:41:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:25,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-31 03:41:25,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:41:25,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:41:25,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:41:25,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:41:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:26,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:27,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:27,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 165 treesize of output 110 [2023-08-31 03:41:27,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:27,387 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 1106 treesize of output 1074 [2023-08-31 03:41:27,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:27,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 394 treesize of output 378 [2023-08-31 03:41:27,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:27,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 342 treesize of output 352 [2023-08-31 03:41:27,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:27,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 367 treesize of output 299 [2023-08-31 03:41:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380873094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:29,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:29,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 47 [2023-08-31 03:41:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838406766] [2023-08-31 03:41:29,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:29,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-31 03:41:29,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-31 03:41:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1952, Unknown=5, NotChecked=0, Total=2256 [2023-08-31 03:41:33,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-31 03:41:33,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4214 transitions, 76681 flow. Second operand has 48 states, 48 states have (on average 73.64583333333333) internal successors, (3535), 48 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:33,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:33,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-31 03:41:33,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:44,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:41:46,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:43,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:44:31,452 INFO L130 PetriNetUnfolder]: 60702/107704 cut-off events. [2023-08-31 03:44:31,452 INFO L131 PetriNetUnfolder]: For 9164338/9164338 co-relation queries the response was YES. [2023-08-31 03:44:36,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193138 conditions, 107704 events. 60702/107704 cut-off events. For 9164338/9164338 co-relation queries the response was YES. Maximal size of possible extension queue 3296. Compared 1057391 event pairs, 10185 based on Foata normal form. 350/108054 useless extension candidates. Maximal degree in co-relation 1192931. Up to 32503 conditions per place. [2023-08-31 03:44:37,106 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 2382 selfloop transitions, 5636 changer transitions 856/8874 dead transitions. [2023-08-31 03:44:37,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 949 places, 8874 transitions, 179634 flow [2023-08-31 03:44:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2023-08-31 03:44:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2023-08-31 03:44:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 17440 transitions. [2023-08-31 03:44:37,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27759207971222105 [2023-08-31 03:44:37,119 INFO L72 ComplementDD]: Start complementDD. Operand 222 states and 17440 transitions. [2023-08-31 03:44:37,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 222 states and 17440 transitions. [2023-08-31 03:44:37,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:44:37,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 222 states and 17440 transitions. [2023-08-31 03:44:37,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 223 states, 222 states have (on average 78.55855855855856) internal successors, (17440), 222 states have internal predecessors, (17440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:44:37,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 223 states, 223 states have (on average 283.0) internal successors, (63109), 223 states have internal predecessors, (63109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:44:37,331 INFO L81 ComplementDD]: Finished complementDD. Result has 223 states, 223 states have (on average 283.0) internal successors, (63109), 223 states have internal predecessors, (63109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:44:37,332 INFO L175 Difference]: Start difference. First operand has 748 places, 4214 transitions, 76681 flow. Second operand 222 states and 17440 transitions. [2023-08-31 03:44:37,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 949 places, 8874 transitions, 179634 flow [2023-08-31 03:47:37,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 868 places, 8874 transitions, 151117 flow, removed 12426 selfloop flow, removed 81 redundant places. [2023-08-31 03:47:37,373 INFO L231 Difference]: Finished difference. Result has 926 places, 6730 transitions, 124211 flow [2023-08-31 03:47:37,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=65173, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=222, PETRI_FLOW=124211, PETRI_PLACES=926, PETRI_TRANSITIONS=6730} [2023-08-31 03:47:37,377 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 894 predicate places. [2023-08-31 03:47:37,377 INFO L495 AbstractCegarLoop]: Abstraction has has 926 places, 6730 transitions, 124211 flow [2023-08-31 03:47:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 73.64583333333333) internal successors, (3535), 48 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:37,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:47:37,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:47:37,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:47:37,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 03:47:37,586 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)] === [2023-08-31 03:47:37,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:47:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1766638429, now seen corresponding path program 11 times [2023-08-31 03:47:37,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:47:37,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394531163] [2023-08-31 03:47:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:47:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:47:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:47:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:47:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394531163] [2023-08-31 03:47:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394531163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:47:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110660826] [2023-08-31 03:47:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:47:38,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:47:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:47:38,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:47:38,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:47:38,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:47:38,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:47:38,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-31 03:47:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:47:38,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:47:38,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:47:38,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:47:38,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:47:39,166 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-31 03:47:39,167 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 35 treesize of output 13 [2023-08-31 03:47:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:39,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:47:40,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:40,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 96 [2023-08-31 03:47:40,351 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:47:40,351 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 530 treesize of output 533 [2023-08-31 03:47:40,397 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:47:40,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 497 treesize of output 433 [2023-08-31 03:47:40,456 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:47:40,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 383 [2023-08-31 03:47:40,506 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:47:40,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 299 [2023-08-31 03:47:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110660826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:47:47,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:47:47,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2023-08-31 03:47:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314267578] [2023-08-31 03:47:47,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:47:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-31 03:47:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:47:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-31 03:47:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1808, Unknown=7, NotChecked=0, Total=2070 [2023-08-31 03:47:49,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-31 03:47:49,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 926 places, 6730 transitions, 124211 flow. Second operand has 46 states, 46 states have (on average 73.71739130434783) internal successors, (3391), 46 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:49,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:47:49,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-31 03:47:49,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:09,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:48:12,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:48:15,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:48:17,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:49:28,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15