./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:28:50,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:28:50,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:28:50,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:28:50,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:28:50,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:28:50,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:28:50,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:28:50,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:28:50,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:28:50,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:28:50,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:28:50,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:28:50,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:28:50,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:28:50,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:28:50,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:28:50,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:28:50,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:28:50,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:28:50,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:28:50,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:28:50,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:28:50,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:28:50,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:28:50,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:28:50,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:28:50,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:28:50,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:28:50,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:28:50,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:28:50,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:28:50,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:28:50,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:28:50,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:28:50,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:28:50,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:28:50,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:28:50,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:28:50,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:28:50,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:28:50,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:28:50,293 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:28:50,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:28:50,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:28:50,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:28:50,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:28:50,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:28:50,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:28:50,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:28:50,296 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:28:50,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:28:50,297 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:28:50,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:28:50,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:28:50,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:28:50,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:28:50,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:28:50,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:28:50,299 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:28:50,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:28:50,299 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:28:50,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:28:50,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:28:50,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:28:50,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:28:50,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:28:50,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:28:50,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:28:50,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:28:50,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:28:50,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:28:50,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:28:50,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:28:50,302 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:28:50,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:28:50,302 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:28:50,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:28:50,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:28:50,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:28:50,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:28:50,630 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:28:50,630 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:28:50,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 21:28:51,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:28:51,913 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:28:51,913 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 21:28:51,923 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07c9e3ee/32be78702cc14a7787300bf742d2e275/FLAGa6968cf97 [2023-08-30 21:28:51,948 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07c9e3ee/32be78702cc14a7787300bf742d2e275 [2023-08-30 21:28:51,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:28:51,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:28:51,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:28:51,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:28:51,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:28:51,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:28:51" (1/1) ... [2023-08-30 21:28:51,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102ee708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:51, skipping insertion in model container [2023-08-30 21:28:51,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:28:51" (1/1) ... [2023-08-30 21:28:51,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:28:51,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:28:52,107 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-send-receive-alt.wvr.c[2650,2663] [2023-08-30 21:28:52,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:28:52,121 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:28:52,138 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-send-receive-alt.wvr.c[2650,2663] [2023-08-30 21:28:52,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:28:52,148 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:28:52,148 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:28:52,154 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:28:52,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52 WrapperNode [2023-08-30 21:28:52,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:28:52,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:28:52,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:28:52,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:28:52,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,206 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2023-08-30 21:28:52,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:28:52,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:28:52,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:28:52,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:28:52,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,257 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:28:52,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:28:52,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:28:52,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:28:52,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (1/1) ... [2023-08-30 21:28:52,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:28:52,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:52,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:28:52,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:28:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:28:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:28:52,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:28:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:28:52,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:28:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:28:52,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:28:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:28:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:28:52,352 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:28:52,461 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:28:52,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:28:52,743 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:28:52,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:28:52,849 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:28:52,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:28:52 BoogieIcfgContainer [2023-08-30 21:28:52,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:28:52,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:28:52,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:28:52,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:28:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:28:51" (1/3) ... [2023-08-30 21:28:52,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a66f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:28:52, skipping insertion in model container [2023-08-30 21:28:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:28:52" (2/3) ... [2023-08-30 21:28:52,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a66f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:28:52, skipping insertion in model container [2023-08-30 21:28:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:28:52" (3/3) ... [2023-08-30 21:28:52,858 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-30 21:28:52,866 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:28:52,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:28:52,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:28:52,874 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:28:52,978 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:28:53,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2023-08-30 21:28:53,099 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-08-30 21:28:53,100 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:28:53,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-30 21:28:53,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 127 transitions, 270 flow [2023-08-30 21:28:53,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 117 transitions, 246 flow [2023-08-30 21:28:53,118 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:28:53,134 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 117 transitions, 246 flow [2023-08-30 21:28:53,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 117 transitions, 246 flow [2023-08-30 21:28:53,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 117 transitions, 246 flow [2023-08-30 21:28:53,178 INFO L130 PetriNetUnfolder]: 11/117 cut-off events. [2023-08-30 21:28:53,179 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:28:53,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 11/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-30 21:28:53,181 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-08-30 21:28:57,509 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-08-30 21:28:57,509 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-30 21:28:57,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:28:57,525 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;@56cbf285, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:28:57,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:28:57,531 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 21:28:57,532 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:28:57,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:57,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:57,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:57,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash -238231372, now seen corresponding path program 1 times [2023-08-30 21:28:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138160988] [2023-08-30 21:28:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138160988] [2023-08-30 21:28:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138160988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:28:57,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:28:57,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:28:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340982151] [2023-08-30 21:28:57,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:28:57,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:28:57,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:28:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:28:58,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 257 [2023-08-30 21:28:58,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:58,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 257 [2023-08-30 21:28:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:58,050 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2023-08-30 21:28:58,050 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 21:28:58,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-08-30 21:28:58,052 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-08-30 21:28:58,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-08-30 21:28:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:28:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:28:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-30 21:28:58,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656290531776913 [2023-08-30 21:28:58,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-30 21:28:58,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-30 21:28:58,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:58,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-30 21:28:58,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,078 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 359 transitions. [2023-08-30 21:28:58,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-08-30 21:28:58,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:28:58,082 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-08-30 21:28:58,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-30 21:28:58,086 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-30 21:28:58,086 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-08-30 21:28:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:58,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:28:58,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:58,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1359864469, now seen corresponding path program 1 times [2023-08-30 21:28:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:58,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53700420] [2023-08-30 21:28:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:58,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:58,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53700420] [2023-08-30 21:28:58,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53700420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:28:58,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:28:58,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:28:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249443795] [2023-08-30 21:28:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:28:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:28:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:28:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:28:58,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-30 21:28:58,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:58,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-30 21:28:58,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:58,267 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2023-08-30 21:28:58,268 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 21:28:58,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-08-30 21:28:58,269 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-08-30 21:28:58,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-08-30 21:28:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:28:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:28:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-30 21:28:58,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44228274967574577 [2023-08-30 21:28:58,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-30 21:28:58,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-30 21:28:58,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:58,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-30 21:28:58,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,276 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 341 transitions. [2023-08-30 21:28:58,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-08-30 21:28:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:28:58,278 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-08-30 21:28:58,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-30 21:28:58,278 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-08-30 21:28:58,279 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-08-30 21:28:58,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:58,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:58,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:28:58,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:58,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:58,280 INFO L85 PathProgramCache]: Analyzing trace with hash 210856546, now seen corresponding path program 1 times [2023-08-30 21:28:58,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:58,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580624209] [2023-08-30 21:28:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:58,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:28:58,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:58,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580624209] [2023-08-30 21:28:58,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580624209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:28:58,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:28:58,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:28:58,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645982927] [2023-08-30 21:28:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:28:58,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:28:58,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:28:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:28:58,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-30 21:28:58,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:58,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-30 21:28:58,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:58,497 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2023-08-30 21:28:58,497 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 21:28:58,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 400 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-08-30 21:28:58,498 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-30 21:28:58,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-08-30 21:28:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:28:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:28:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-30 21:28:58,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438715953307393 [2023-08-30 21:28:58,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-30 21:28:58,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-30 21:28:58,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:58,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-30 21:28:58,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,505 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,505 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 451 transitions. [2023-08-30 21:28:58,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-08-30 21:28:58,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:28:58,507 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-08-30 21:28:58,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-30 21:28:58,508 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-30 21:28:58,508 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-08-30 21:28:58,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:58,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:58,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:58,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:28:58,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:58,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash -961979074, now seen corresponding path program 1 times [2023-08-30 21:28:58,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:58,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201358562] [2023-08-30 21:28:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:58,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:59,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201358562] [2023-08-30 21:28:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201358562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769048720] [2023-08-30 21:28:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:59,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:59,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:59,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:28:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:28:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:59,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:28:59,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:28:59,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:29:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:00,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:00,397 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-30 21:29:00,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:00,455 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 [2023-08-30 21:29:00,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:00,474 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 316 treesize of output 292 [2023-08-30 21:29:00,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:00,497 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 96 treesize of output 92 [2023-08-30 21:29:00,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:00,514 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 95 treesize of output 79 [2023-08-30 21:29:00,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:00,733 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-30 21:29:00,743 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 21:29:00,743 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 148 treesize of output 136 [2023-08-30 21:29:00,756 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 21:29:00,757 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 132 treesize of output 112 [2023-08-30 21:29:00,770 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 21:29:00,771 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 83 treesize of output 75 [2023-08-30 21:29:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 21:29:00,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769048720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:00,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:00,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-30 21:29:00,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208326925] [2023-08-30 21:29:00,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:00,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:29:00,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:29:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=4, NotChecked=36, Total=420 [2023-08-30 21:29:00,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-30 21:29:00,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:00,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:00,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-30 21:29:00,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:02,183 INFO L130 PetriNetUnfolder]: 171/351 cut-off events. [2023-08-30 21:29:02,184 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 21:29:02,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 351 events. 171/351 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1451 event pairs, 30 based on Foata normal form. 12/359 useless extension candidates. Maximal degree in co-relation 829. Up to 101 conditions per place. [2023-08-30 21:29:02,188 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 31 selfloop transitions, 15 changer transitions 56/102 dead transitions. [2023-08-30 21:29:02,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 102 transitions, 503 flow [2023-08-30 21:29:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:29:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:29:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1294 transitions. [2023-08-30 21:29:02,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29617761501487755 [2023-08-30 21:29:02,192 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1294 transitions. [2023-08-30 21:29:02,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1294 transitions. [2023-08-30 21:29:02,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:02,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1294 transitions. [2023-08-30 21:29:02,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.11764705882354) internal successors, (1294), 17 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,204 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,204 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 17 states and 1294 transitions. [2023-08-30 21:29:02,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 102 transitions, 503 flow [2023-08-30 21:29:02,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 102 transitions, 491 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 21:29:02,207 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 167 flow [2023-08-30 21:29:02,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 21:29:02,208 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-08-30 21:29:02,208 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 167 flow [2023-08-30 21:29:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:02,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:02,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:29:02,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:02,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:02,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash -438286575, now seen corresponding path program 2 times [2023-08-30 21:29:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:02,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510671756] [2023-08-30 21:29:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:02,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:02,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510671756] [2023-08-30 21:29:02,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510671756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:02,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381380860] [2023-08-30 21:29:02,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:29:02,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:02,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:02,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:29:02,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:29:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:02,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:29:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:02,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-08-30 21:29:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:02,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:02,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2023-08-30 21:29:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381380860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:02,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:02,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-08-30 21:29:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670082818] [2023-08-30 21:29:02,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:29:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:02,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:29:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:29:02,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 257 [2023-08-30 21:29:02,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 167 flow. Second operand has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:02,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 257 [2023-08-30 21:29:02,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:02,991 INFO L130 PetriNetUnfolder]: 198/396 cut-off events. [2023-08-30 21:29:02,991 INFO L131 PetriNetUnfolder]: For 274/276 co-relation queries the response was YES. [2023-08-30 21:29:02,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 396 events. 198/396 cut-off events. For 274/276 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1665 event pairs, 55 based on Foata normal form. 8/392 useless extension candidates. Maximal degree in co-relation 562. Up to 142 conditions per place. [2023-08-30 21:29:02,993 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-30 21:29:02,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 352 flow [2023-08-30 21:29:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:29:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:29:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-30 21:29:02,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45233463035019456 [2023-08-30 21:29:02,995 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-30 21:29:02,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-30 21:29:02,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:02,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-30 21:29:02,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:02,999 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 167 flow. Second operand 4 states and 465 transitions. [2023-08-30 21:29:02,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 352 flow [2023-08-30 21:29:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 329 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 21:29:03,002 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 245 flow [2023-08-30 21:29:03,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 21:29:03,003 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-30 21:29:03,003 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 245 flow [2023-08-30 21:29:03,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:03,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:03,004 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:03,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:03,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:03,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:03,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1347002828, now seen corresponding path program 3 times [2023-08-30 21:29:03,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:03,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858171086] [2023-08-30 21:29:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:04,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:04,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858171086] [2023-08-30 21:29:04,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858171086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:04,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666584141] [2023-08-30 21:29:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:29:04,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:04,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:29:04,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:29:04,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 21:29:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:29:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:05,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:05,003 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 68 treesize of output 44 [2023-08-30 21:29:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:29:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666584141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:05,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-08-30 21:29:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351044658] [2023-08-30 21:29:05,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:05,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:29:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:29:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:29:05,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-08-30 21:29:05,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 245 flow. Second operand has 22 states, 22 states have (on average 93.13636363636364) internal successors, (2049), 22 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:05,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:05,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-08-30 21:29:05,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:06,433 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2023-08-30 21:29:06,433 INFO L131 PetriNetUnfolder]: For 727/727 co-relation queries the response was YES. [2023-08-30 21:29:06,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 613 events. 313/613 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2862 event pairs, 36 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 958. Up to 174 conditions per place. [2023-08-30 21:29:06,436 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2023-08-30 21:29:06,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 118 transitions, 780 flow [2023-08-30 21:29:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:29:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:29:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1561 transitions. [2023-08-30 21:29:06,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962062256809337 [2023-08-30 21:29:06,441 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1561 transitions. [2023-08-30 21:29:06,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1561 transitions. [2023-08-30 21:29:06,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:06,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1561 transitions. [2023-08-30 21:29:06,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:06,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:06,452 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:06,452 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 245 flow. Second operand 16 states and 1561 transitions. [2023-08-30 21:29:06,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 118 transitions, 780 flow [2023-08-30 21:29:06,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 750 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 21:29:06,457 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 378 flow [2023-08-30 21:29:06,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=378, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-30 21:29:06,458 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-08-30 21:29:06,458 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 378 flow [2023-08-30 21:29:06,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.13636363636364) internal successors, (2049), 22 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:06,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:06,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:06,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:06,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:06,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:06,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash -218673542, now seen corresponding path program 4 times [2023-08-30 21:29:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476991689] [2023-08-30 21:29:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476991689] [2023-08-30 21:29:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476991689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706790659] [2023-08-30 21:29:07,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:29:07,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:07,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:29:07,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:29:07,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:07,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:29:07,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:29:08,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:08,320 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:29:08,321 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 216 treesize of output 170 [2023-08-30 21:29:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:08,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706790659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:08,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:08,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2023-08-30 21:29:08,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723200249] [2023-08-30 21:29:08,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:08,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:29:08,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:08,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:29:08,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:29:09,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-08-30 21:29:09,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 378 flow. Second operand has 23 states, 23 states have (on average 93.21739130434783) internal successors, (2144), 23 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:09,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:09,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-08-30 21:29:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:10,213 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2023-08-30 21:29:10,213 INFO L131 PetriNetUnfolder]: For 1366/1366 co-relation queries the response was YES. [2023-08-30 21:29:10,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 846 events. 441/846 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4210 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 2087. Up to 186 conditions per place. [2023-08-30 21:29:10,219 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2023-08-30 21:29:10,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 161 transitions, 1136 flow [2023-08-30 21:29:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 21:29:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 21:29:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2055 transitions. [2023-08-30 21:29:10,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3807670928293496 [2023-08-30 21:29:10,225 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2055 transitions. [2023-08-30 21:29:10,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2055 transitions. [2023-08-30 21:29:10,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:10,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2055 transitions. [2023-08-30 21:29:10,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 97.85714285714286) internal successors, (2055), 21 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:10,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:10,237 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:10,238 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 378 flow. Second operand 21 states and 2055 transitions. [2023-08-30 21:29:10,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 161 transitions, 1136 flow [2023-08-30 21:29:10,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 161 transitions, 1078 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 21:29:10,245 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 560 flow [2023-08-30 21:29:10,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=560, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-08-30 21:29:10,246 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-30 21:29:10,247 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 560 flow [2023-08-30 21:29:10,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.21739130434783) internal successors, (2144), 23 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:10,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:10,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:10,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:10,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:10,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:10,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -417535956, now seen corresponding path program 5 times [2023-08-30 21:29:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:10,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807919057] [2023-08-30 21:29:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:11,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807919057] [2023-08-30 21:29:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807919057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894639271] [2023-08-30 21:29:11,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:29:11,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:11,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:11,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:11,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:29:11,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:29:11,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 21:29:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:12,306 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:29:12,306 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 216 treesize of output 170 [2023-08-30 21:29:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894639271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:12,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-08-30 21:29:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334342152] [2023-08-30 21:29:12,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:12,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:29:12,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:29:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:29:13,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-08-30 21:29:13,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 560 flow. Second operand has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:13,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:13,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-08-30 21:29:13,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:14,718 INFO L130 PetriNetUnfolder]: 569/1117 cut-off events. [2023-08-30 21:29:14,718 INFO L131 PetriNetUnfolder]: For 2192/2192 co-relation queries the response was YES. [2023-08-30 21:29:14,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 1117 events. 569/1117 cut-off events. For 2192/2192 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6077 event pairs, 72 based on Foata normal form. 41/1158 useless extension candidates. Maximal degree in co-relation 3572. Up to 228 conditions per place. [2023-08-30 21:29:14,724 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 62 selfloop transitions, 33 changer transitions 63/158 dead transitions. [2023-08-30 21:29:14,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1263 flow [2023-08-30 21:29:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 21:29:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 21:29:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1822 transitions. [2023-08-30 21:29:14,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37313127175916444 [2023-08-30 21:29:14,730 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1822 transitions. [2023-08-30 21:29:14,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1822 transitions. [2023-08-30 21:29:14,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:14,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1822 transitions. [2023-08-30 21:29:14,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:14,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:14,741 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:14,741 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 560 flow. Second operand 19 states and 1822 transitions. [2023-08-30 21:29:14,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1263 flow [2023-08-30 21:29:14,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 158 transitions, 1123 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-30 21:29:14,756 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 612 flow [2023-08-30 21:29:14,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=612, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2023-08-30 21:29:14,759 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-30 21:29:14,759 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 612 flow [2023-08-30 21:29:14,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:14,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:14,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:14,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:14,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:14,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:14,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1104904085, now seen corresponding path program 6 times [2023-08-30 21:29:14,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:14,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902481524] [2023-08-30 21:29:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:14,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:29:15,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902481524] [2023-08-30 21:29:15,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902481524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692185337] [2023-08-30 21:29:15,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:29:15,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:15,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:15,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:15,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:29:15,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:29:15,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:29:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:15,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:15,432 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 158 treesize of output 108 [2023-08-30 21:29:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:15,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:15,706 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:29:15,707 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 174 treesize of output 126 [2023-08-30 21:29:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692185337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:15,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-08-30 21:29:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744136920] [2023-08-30 21:29:15,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:29:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:29:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:29:15,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 257 [2023-08-30 21:29:15,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 612 flow. Second operand has 18 states, 18 states have (on average 98.5) internal successors, (1773), 18 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:15,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:15,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 257 [2023-08-30 21:29:15,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:16,455 INFO L130 PetriNetUnfolder]: 899/1721 cut-off events. [2023-08-30 21:29:16,455 INFO L131 PetriNetUnfolder]: For 6557/6557 co-relation queries the response was YES. [2023-08-30 21:29:16,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6677 conditions, 1721 events. 899/1721 cut-off events. For 6557/6557 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10263 event pairs, 134 based on Foata normal form. 20/1729 useless extension candidates. Maximal degree in co-relation 5965. Up to 515 conditions per place. [2023-08-30 21:29:16,464 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 69 selfloop transitions, 47 changer transitions 39/158 dead transitions. [2023-08-30 21:29:16,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 158 transitions, 1502 flow [2023-08-30 21:29:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 21:29:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 21:29:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1542 transitions. [2023-08-30 21:29:16,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-30 21:29:16,470 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1542 transitions. [2023-08-30 21:29:16,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1542 transitions. [2023-08-30 21:29:16,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:16,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1542 transitions. [2023-08-30 21:29:16,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.8) internal successors, (1542), 15 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:16,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:16,481 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:16,481 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 612 flow. Second operand 15 states and 1542 transitions. [2023-08-30 21:29:16,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 158 transitions, 1502 flow [2023-08-30 21:29:16,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1409 flow, removed 23 selfloop flow, removed 13 redundant places. [2023-08-30 21:29:16,498 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 1000 flow [2023-08-30 21:29:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1000, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-08-30 21:29:16,499 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-30 21:29:16,499 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 1000 flow [2023-08-30 21:29:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.5) internal successors, (1773), 18 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:16,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:16,500 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:16,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:16,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:16,706 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:16,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1313718566, now seen corresponding path program 7 times [2023-08-30 21:29:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420360966] [2023-08-30 21:29:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:17,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420360966] [2023-08-30 21:29:17,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420360966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:17,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683709338] [2023-08-30 21:29:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:29:17,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:17,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:17,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:29:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 21:29:18,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:18,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:19,211 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 21:29:19,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-30 21:29:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:20,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683709338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:20,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:20,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-30 21:29:20,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479241376] [2023-08-30 21:29:20,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:20,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 21:29:20,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 21:29:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 21:29:21,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-08-30 21:29:21,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 1000 flow. Second operand has 38 states, 38 states have (on average 90.55263157894737) internal successors, (3441), 38 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:21,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:21,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-08-30 21:29:21,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:32,216 INFO L130 PetriNetUnfolder]: 3356/6261 cut-off events. [2023-08-30 21:29:32,216 INFO L131 PetriNetUnfolder]: For 35857/35857 co-relation queries the response was YES. [2023-08-30 21:29:32,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28714 conditions, 6261 events. 3356/6261 cut-off events. For 35857/35857 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46527 event pairs, 313 based on Foata normal form. 125/6386 useless extension candidates. Maximal degree in co-relation 26164. Up to 1789 conditions per place. [2023-08-30 21:29:32,256 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 338 selfloop transitions, 256 changer transitions 261/855 dead transitions. [2023-08-30 21:29:32,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 855 transitions, 8885 flow [2023-08-30 21:29:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-30 21:29:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-30 21:29:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 8477 transitions. [2023-08-30 21:29:32,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37913144595017667 [2023-08-30 21:29:32,308 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 8477 transitions. [2023-08-30 21:29:32,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 8477 transitions. [2023-08-30 21:29:32,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:32,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 8477 transitions. [2023-08-30 21:29:32,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 97.4367816091954) internal successors, (8477), 87 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:32,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:32,355 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:32,355 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 1000 flow. Second operand 87 states and 8477 transitions. [2023-08-30 21:29:32,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 855 transitions, 8885 flow [2023-08-30 21:29:32,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 855 transitions, 7509 flow, removed 684 selfloop flow, removed 7 redundant places. [2023-08-30 21:29:32,429 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 5485 flow [2023-08-30 21:29:32,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5485, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2023-08-30 21:29:32,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-30 21:29:32,430 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 5485 flow [2023-08-30 21:29:32,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.55263157894737) internal successors, (3441), 38 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:32,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:32,432 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:32,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:32,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:32,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:32,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1326553260, now seen corresponding path program 8 times [2023-08-30 21:29:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924761480] [2023-08-30 21:29:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924761480] [2023-08-30 21:29:33,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924761480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899459828] [2023-08-30 21:29:33,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:29:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:33,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:33,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:29:34,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:29:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:29:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:29:34,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:34,988 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 21:29:34,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-08-30 21:29:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:29:35,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899459828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:35,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:35,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 29 [2023-08-30 21:29:35,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930067795] [2023-08-30 21:29:35,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:35,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:29:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:29:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-08-30 21:29:37,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-08-30 21:29:37,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 5485 flow. Second operand has 31 states, 31 states have (on average 92.87096774193549) internal successors, (2879), 31 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:37,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:37,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-08-30 21:29:37,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:40,108 INFO L130 PetriNetUnfolder]: 3862/7194 cut-off events. [2023-08-30 21:29:40,108 INFO L131 PetriNetUnfolder]: For 175517/175517 co-relation queries the response was YES. [2023-08-30 21:29:40,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33674 conditions, 7194 events. 3862/7194 cut-off events. For 175517/175517 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54494 event pairs, 997 based on Foata normal form. 49/7243 useless extension candidates. Maximal degree in co-relation 31360. Up to 4109 conditions per place. [2023-08-30 21:29:40,173 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 322 selfloop transitions, 143 changer transitions 135/600 dead transitions. [2023-08-30 21:29:40,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 600 transitions, 8658 flow [2023-08-30 21:29:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:29:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:29:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3440 transitions. [2023-08-30 21:29:40,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38243468593663144 [2023-08-30 21:29:40,179 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3440 transitions. [2023-08-30 21:29:40,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3440 transitions. [2023-08-30 21:29:40,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:40,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3440 transitions. [2023-08-30 21:29:40,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:40,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 257.0) internal successors, (9252), 36 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:40,192 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 257.0) internal successors, (9252), 36 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:40,192 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 5485 flow. Second operand 35 states and 3440 transitions. [2023-08-30 21:29:40,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 600 transitions, 8658 flow [2023-08-30 21:29:40,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 600 transitions, 6342 flow, removed 1138 selfloop flow, removed 8 redundant places. [2023-08-30 21:29:40,833 INFO L231 Difference]: Finished difference. Result has 268 places, 381 transitions, 4894 flow [2023-08-30 21:29:40,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4894, PETRI_PLACES=268, PETRI_TRANSITIONS=381} [2023-08-30 21:29:40,833 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-08-30 21:29:40,834 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 381 transitions, 4894 flow [2023-08-30 21:29:40,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 92.87096774193549) internal successors, (2879), 31 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:40,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:40,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:40,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 21:29:41,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 21:29:41,037 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:41,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:41,037 INFO L85 PathProgramCache]: Analyzing trace with hash -283334480, now seen corresponding path program 9 times [2023-08-30 21:29:41,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:41,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158484122] [2023-08-30 21:29:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:41,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:42,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:42,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158484122] [2023-08-30 21:29:42,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158484122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:42,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909376798] [2023-08-30 21:29:42,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:29:42,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:42,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:42,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:29:42,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:29:42,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-30 21:29:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:42,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:29:42,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:29:42,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:29:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:43,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:44,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:44,480 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 182 treesize of output 122 [2023-08-30 21:29:44,542 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 21:29:44,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-08-30 21:29:44,602 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 21:29:44,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-08-30 21:29:44,659 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 21:29:44,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-08-30 21:29:48,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:48,301 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 182 treesize of output 122 [2023-08-30 21:29:48,342 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 21:29:48,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 700 [2023-08-30 21:29:48,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:29:48,376 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:29:48,376 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:29:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:29:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:29:48,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-08-30 21:29:48,410 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 21:29:48,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 187 [2023-08-30 21:29:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909376798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:48,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:48,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-30 21:29:48,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261359628] [2023-08-30 21:29:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 21:29:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 21:29:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1115, Unknown=4, NotChecked=0, Total=1482 [2023-08-30 21:29:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-30 21:29:49,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 381 transitions, 4894 flow. Second operand has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:49,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:49,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-30 21:29:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:54,637 INFO L130 PetriNetUnfolder]: 3863/7211 cut-off events. [2023-08-30 21:29:54,637 INFO L131 PetriNetUnfolder]: For 193350/193350 co-relation queries the response was YES. [2023-08-30 21:29:54,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31131 conditions, 7211 events. 3863/7211 cut-off events. For 193350/193350 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54119 event pairs, 1430 based on Foata normal form. 31/7242 useless extension candidates. Maximal degree in co-relation 30589. Up to 5735 conditions per place. [2023-08-30 21:29:54,694 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 389 selfloop transitions, 93 changer transitions 98/580 dead transitions. [2023-08-30 21:29:54,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 580 transitions, 7321 flow [2023-08-30 21:29:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 21:29:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 21:29:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2908 transitions. [2023-08-30 21:29:54,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29776776571779645 [2023-08-30 21:29:54,699 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2908 transitions. [2023-08-30 21:29:54,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2908 transitions. [2023-08-30 21:29:54,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:54,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2908 transitions. [2023-08-30 21:29:54,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 76.52631578947368) internal successors, (2908), 38 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:54,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 257.0) internal successors, (10023), 39 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:54,711 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 257.0) internal successors, (10023), 39 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:54,711 INFO L175 Difference]: Start difference. First operand has 268 places, 381 transitions, 4894 flow. Second operand 38 states and 2908 transitions. [2023-08-30 21:29:54,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 580 transitions, 7321 flow [2023-08-30 21:29:55,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 580 transitions, 6710 flow, removed 223 selfloop flow, removed 24 redundant places. [2023-08-30 21:29:55,602 INFO L231 Difference]: Finished difference. Result has 294 places, 407 transitions, 5009 flow [2023-08-30 21:29:55,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5009, PETRI_PLACES=294, PETRI_TRANSITIONS=407} [2023-08-30 21:29:55,603 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2023-08-30 21:29:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 407 transitions, 5009 flow [2023-08-30 21:29:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:55,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:55,604 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:55,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:55,806 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:55,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash 600606014, now seen corresponding path program 10 times [2023-08-30 21:29:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:55,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437400156] [2023-08-30 21:29:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437400156] [2023-08-30 21:29:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437400156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746581317] [2023-08-30 21:29:58,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:29:58,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:58,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:58,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:58,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:29:58,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:29:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 21:29:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:29:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:59,487 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 21:29:59,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-08-30 21:30:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:30:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746581317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:30:00,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:30:00,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 32 [2023-08-30 21:30:00,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625128320] [2023-08-30 21:30:00,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:30:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 21:30:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:30:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 21:30:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 21:30:01,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-08-30 21:30:01,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 407 transitions, 5009 flow. Second operand has 34 states, 34 states have (on average 90.79411764705883) internal successors, (3087), 34 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:01,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:30:01,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-08-30 21:30:01,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:07,291 INFO L130 PetriNetUnfolder]: 5799/10763 cut-off events. [2023-08-30 21:30:07,291 INFO L131 PetriNetUnfolder]: For 337153/337153 co-relation queries the response was YES. [2023-08-30 21:30:07,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 10763 events. 5799/10763 cut-off events. For 337153/337153 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 86101 event pairs, 1113 based on Foata normal form. 60/10823 useless extension candidates. Maximal degree in co-relation 41359. Up to 3694 conditions per place. [2023-08-30 21:30:07,393 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 390 selfloop transitions, 333 changer transitions 174/897 dead transitions. [2023-08-30 21:30:07,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 897 transitions, 10714 flow [2023-08-30 21:30:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 21:30:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 21:30:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4639 transitions. [2023-08-30 21:30:07,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760538261997406 [2023-08-30 21:30:07,400 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4639 transitions. [2023-08-30 21:30:07,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4639 transitions. [2023-08-30 21:30:07,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:30:07,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4639 transitions. [2023-08-30 21:30:07,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 96.64583333333333) internal successors, (4639), 48 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:07,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 257.0) internal successors, (12593), 49 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:07,420 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 257.0) internal successors, (12593), 49 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:07,420 INFO L175 Difference]: Start difference. First operand has 294 places, 407 transitions, 5009 flow. Second operand 48 states and 4639 transitions. [2023-08-30 21:30:07,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 897 transitions, 10714 flow [2023-08-30 21:30:08,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 897 transitions, 10281 flow, removed 185 selfloop flow, removed 16 redundant places. [2023-08-30 21:30:08,744 INFO L231 Difference]: Finished difference. Result has 351 places, 575 transitions, 8243 flow [2023-08-30 21:30:08,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8243, PETRI_PLACES=351, PETRI_TRANSITIONS=575} [2023-08-30 21:30:08,744 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 331 predicate places. [2023-08-30 21:30:08,745 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 575 transitions, 8243 flow [2023-08-30 21:30:08,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.79411764705883) internal successors, (3087), 34 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:08,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:30:08,745 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:30:08,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:30:08,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 21:30:08,946 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:30:08,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:30:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2116468834, now seen corresponding path program 11 times [2023-08-30 21:30:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:30:08,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142051502] [2023-08-30 21:30:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:30:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:30:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:30:09,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:30:09,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142051502] [2023-08-30 21:30:09,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142051502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:30:09,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034882062] [2023-08-30 21:30:09,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:30:09,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:30:09,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:30:09,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:30:09,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 21:30:09,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:30:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:30:09,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:30:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:30:09,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:30:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:30:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034882062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:30:09,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:30:09,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 21:30:09,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324562583] [2023-08-30 21:30:09,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:30:09,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:30:09,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:30:09,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:30:09,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:30:10,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 257 [2023-08-30 21:30:10,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 575 transitions, 8243 flow. Second operand has 29 states, 29 states have (on average 99.0) internal successors, (2871), 29 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:10,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:30:10,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 257 [2023-08-30 21:30:10,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:11,645 INFO L130 PetriNetUnfolder]: 2651/5001 cut-off events. [2023-08-30 21:30:11,645 INFO L131 PetriNetUnfolder]: For 97156/97156 co-relation queries the response was YES. [2023-08-30 21:30:11,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25234 conditions, 5001 events. 2651/5001 cut-off events. For 97156/97156 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 35537 event pairs, 1755 based on Foata normal form. 52/5053 useless extension candidates. Maximal degree in co-relation 24929. Up to 4531 conditions per place. [2023-08-30 21:30:11,693 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 242 selfloop transitions, 5 changer transitions 87/334 dead transitions. [2023-08-30 21:30:11,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 334 transitions, 5441 flow [2023-08-30 21:30:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:30:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:30:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1754 transitions. [2023-08-30 21:30:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014648661020829 [2023-08-30 21:30:11,698 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1754 transitions. [2023-08-30 21:30:11,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1754 transitions. [2023-08-30 21:30:11,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:30:11,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1754 transitions. [2023-08-30 21:30:11,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.17647058823529) internal successors, (1754), 17 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:11,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:11,704 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:11,704 INFO L175 Difference]: Start difference. First operand has 351 places, 575 transitions, 8243 flow. Second operand 17 states and 1754 transitions. [2023-08-30 21:30:11,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 334 transitions, 5441 flow [2023-08-30 21:30:12,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 334 transitions, 4645 flow, removed 280 selfloop flow, removed 89 redundant places. [2023-08-30 21:30:12,177 INFO L231 Difference]: Finished difference. Result has 217 places, 247 transitions, 3522 flow [2023-08-30 21:30:12,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3522, PETRI_PLACES=217, PETRI_TRANSITIONS=247} [2023-08-30 21:30:12,178 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-30 21:30:12,178 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 247 transitions, 3522 flow [2023-08-30 21:30:12,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.0) internal successors, (2871), 29 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:12,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:30:12,179 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:30:12,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:30:12,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:30:12,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:30:12,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:30:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 550463705, now seen corresponding path program 12 times [2023-08-30 21:30:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:30:12,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199319097] [2023-08-30 21:30:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:30:12,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:30:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:14,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:30:14,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199319097] [2023-08-30 21:30:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199319097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:30:14,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335463975] [2023-08-30 21:30:14,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:30:14,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:14,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:30:14,181 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:30:14,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:30:14,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:30:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:30:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 21:30:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:30:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:15,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:30:15,786 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 21:30:15,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-30 21:30:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:17,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335463975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:30:17,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:30:17,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2023-08-30 21:30:17,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922346330] [2023-08-30 21:30:17,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:30:17,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:30:17,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:30:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:30:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 21:30:19,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 257 [2023-08-30 21:30:19,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 247 transitions, 3522 flow. Second operand has 44 states, 44 states have (on average 85.52272727272727) internal successors, (3763), 44 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:19,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:30:19,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 257 [2023-08-30 21:30:19,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:37,009 INFO L130 PetriNetUnfolder]: 6410/12085 cut-off events. [2023-08-30 21:30:37,009 INFO L131 PetriNetUnfolder]: For 176308/176308 co-relation queries the response was YES. [2023-08-30 21:30:37,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59823 conditions, 12085 events. 6410/12085 cut-off events. For 176308/176308 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 98501 event pairs, 1142 based on Foata normal form. 392/12477 useless extension candidates. Maximal degree in co-relation 59730. Up to 3699 conditions per place. [2023-08-30 21:30:37,086 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 621 selfloop transitions, 412 changer transitions 459/1492 dead transitions. [2023-08-30 21:30:37,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1492 transitions, 18310 flow [2023-08-30 21:30:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-08-30 21:30:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2023-08-30 21:30:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 13275 transitions. [2023-08-30 21:30:37,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35870622568093385 [2023-08-30 21:30:37,100 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 13275 transitions. [2023-08-30 21:30:37,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 13275 transitions. [2023-08-30 21:30:37,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:30:37,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 13275 transitions. [2023-08-30 21:30:37,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 92.1875) internal successors, (13275), 144 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:37,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 257.0) internal successors, (37265), 145 states have internal predecessors, (37265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:37,144 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 257.0) internal successors, (37265), 145 states have internal predecessors, (37265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:37,144 INFO L175 Difference]: Start difference. First operand has 217 places, 247 transitions, 3522 flow. Second operand 144 states and 13275 transitions. [2023-08-30 21:30:37,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1492 transitions, 18310 flow [2023-08-30 21:30:37,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1492 transitions, 17740 flow, removed 266 selfloop flow, removed 15 redundant places. [2023-08-30 21:30:37,604 INFO L231 Difference]: Finished difference. Result has 388 places, 622 transitions, 12371 flow [2023-08-30 21:30:37,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=12371, PETRI_PLACES=388, PETRI_TRANSITIONS=622} [2023-08-30 21:30:37,605 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 368 predicate places. [2023-08-30 21:30:37,605 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 622 transitions, 12371 flow [2023-08-30 21:30:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 85.52272727272727) internal successors, (3763), 44 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:37,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:30:37,606 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:30:37,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:30:37,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:30:37,806 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:30:37,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:30:37,806 INFO L85 PathProgramCache]: Analyzing trace with hash 435785617, now seen corresponding path program 13 times [2023-08-30 21:30:37,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:30:37,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682228170] [2023-08-30 21:30:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:30:37,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:30:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:30:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:30:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682228170] [2023-08-30 21:30:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682228170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:30:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049010836] [2023-08-30 21:30:38,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:30:38,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:38,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:30:38,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:30:38,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:30:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:38,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:30:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:30:38,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:38,356 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 226 treesize of output 140 [2023-08-30 21:30:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:30:38,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:30:38,649 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 21:30:38,650 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 260 treesize of output 176 [2023-08-30 21:30:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:30:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049010836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:30:38,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:30:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2023-08-30 21:30:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399182227] [2023-08-30 21:30:38,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:30:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:30:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:30:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:30:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:30:38,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 257 [2023-08-30 21:30:38,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 622 transitions, 12371 flow. Second operand has 17 states, 17 states have (on average 101.41176470588235) internal successors, (1724), 17 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:38,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:30:38,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 257 [2023-08-30 21:30:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:43,691 INFO L130 PetriNetUnfolder]: 8402/15845 cut-off events. [2023-08-30 21:30:43,691 INFO L131 PetriNetUnfolder]: For 421652/421652 co-relation queries the response was YES. [2023-08-30 21:30:43,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90259 conditions, 15845 events. 8402/15845 cut-off events. For 421652/421652 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 136050 event pairs, 1858 based on Foata normal form. 64/15909 useless extension candidates. Maximal degree in co-relation 88842. Up to 7532 conditions per place. [2023-08-30 21:30:43,837 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 454 selfloop transitions, 421 changer transitions 16/891 dead transitions. [2023-08-30 21:30:43,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 891 transitions, 20109 flow [2023-08-30 21:30:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 21:30:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 21:30:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1505 transitions. [2023-08-30 21:30:43,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182879377431907 [2023-08-30 21:30:43,838 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1505 transitions. [2023-08-30 21:30:43,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1505 transitions. [2023-08-30 21:30:43,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:30:43,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1505 transitions. [2023-08-30 21:30:43,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.5) internal successors, (1505), 14 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:43,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:43,843 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:43,844 INFO L175 Difference]: Start difference. First operand has 388 places, 622 transitions, 12371 flow. Second operand 14 states and 1505 transitions. [2023-08-30 21:30:43,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 891 transitions, 20109 flow [2023-08-30 21:30:47,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 891 transitions, 15318 flow, removed 2353 selfloop flow, removed 24 redundant places. [2023-08-30 21:30:47,027 INFO L231 Difference]: Finished difference. Result has 383 places, 809 transitions, 13450 flow [2023-08-30 21:30:47,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13450, PETRI_PLACES=383, PETRI_TRANSITIONS=809} [2023-08-30 21:30:47,027 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 363 predicate places. [2023-08-30 21:30:47,028 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 809 transitions, 13450 flow [2023-08-30 21:30:47,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 101.41176470588235) internal successors, (1724), 17 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:47,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:30:47,028 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:30:47,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:30:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:30:47,229 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:30:47,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:30:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 530970796, now seen corresponding path program 14 times [2023-08-30 21:30:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:30:47,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000748995] [2023-08-30 21:30:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:30:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:30:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:48,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:30:48,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000748995] [2023-08-30 21:30:48,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000748995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:30:48,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510938673] [2023-08-30 21:30:48,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:30:48,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:48,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:30:48,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:30:48,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:30:48,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:30:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:30:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 21:30:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:30:49,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:30:49,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:30:49,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:30:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:49,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:30:50,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:50,999 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 243 treesize of output 159 [2023-08-30 21:30:51,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:51,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1050 [2023-08-30 21:30:51,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:51,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 438 [2023-08-30 21:30:51,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:51,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 383 [2023-08-30 21:31:09,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:09,832 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 243 treesize of output 159 [2023-08-30 21:31:09,873 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-30 21:31:09,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 914 [2023-08-30 21:31:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:31:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:31:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:31:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:09,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 286 [2023-08-30 21:31:09,945 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-30 21:31:09,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 247 [2023-08-30 21:31:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510938673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:10,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:10,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-08-30 21:31:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097661463] [2023-08-30 21:31:10,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 21:31:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 21:31:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1964, Unknown=3, NotChecked=0, Total=2352 [2023-08-30 21:31:11,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-30 21:31:11,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 809 transitions, 13450 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:11,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:11,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-30 21:31:11,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:43,501 INFO L130 PetriNetUnfolder]: 20260/37630 cut-off events. [2023-08-30 21:31:43,501 INFO L131 PetriNetUnfolder]: For 1536639/1536639 co-relation queries the response was YES. [2023-08-30 21:31:44,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213092 conditions, 37630 events. 20260/37630 cut-off events. For 1536639/1536639 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 356851 event pairs, 3956 based on Foata normal form. 269/37899 useless extension candidates. Maximal degree in co-relation 211685. Up to 11440 conditions per place. [2023-08-30 21:31:44,076 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 1210 selfloop transitions, 1340 changer transitions 460/3010 dead transitions. [2023-08-30 21:31:44,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 3010 transitions, 55742 flow [2023-08-30 21:31:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-08-30 21:31:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2023-08-30 21:31:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 12840 transitions. [2023-08-30 21:31:44,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30464078959855745 [2023-08-30 21:31:44,091 INFO L72 ComplementDD]: Start complementDD. Operand 164 states and 12840 transitions. [2023-08-30 21:31:44,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 12840 transitions. [2023-08-30 21:31:44,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:44,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 164 states and 12840 transitions. [2023-08-30 21:31:44,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 165 states, 164 states have (on average 78.29268292682927) internal successors, (12840), 164 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:44,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 165 states, 165 states have (on average 257.0) internal successors, (42405), 165 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:44,144 INFO L81 ComplementDD]: Finished complementDD. Result has 165 states, 165 states have (on average 257.0) internal successors, (42405), 165 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:44,144 INFO L175 Difference]: Start difference. First operand has 383 places, 809 transitions, 13450 flow. Second operand 164 states and 12840 transitions. [2023-08-30 21:31:44,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 3010 transitions, 55742 flow [2023-08-30 21:31:56,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 3010 transitions, 53192 flow, removed 1255 selfloop flow, removed 4 redundant places. [2023-08-30 21:31:56,293 INFO L231 Difference]: Finished difference. Result has 653 places, 2001 transitions, 43422 flow [2023-08-30 21:31:56,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=43422, PETRI_PLACES=653, PETRI_TRANSITIONS=2001} [2023-08-30 21:31:56,294 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 633 predicate places. [2023-08-30 21:31:56,294 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 2001 transitions, 43422 flow [2023-08-30 21:31:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:56,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:56,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:56,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:56,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:56,500 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:56,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:56,501 INFO L85 PathProgramCache]: Analyzing trace with hash 630946832, now seen corresponding path program 15 times [2023-08-30 21:31:56,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:56,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224675548] [2023-08-30 21:31:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:56,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:58,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224675548] [2023-08-30 21:31:58,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224675548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270668702] [2023-08-30 21:31:58,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:31:58,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:58,497 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:58,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:31:58,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:31:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 21:31:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:58,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:31:58,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:31:58,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:31:59,536 INFO L321 Elim1Store]: treesize reduction 196, result has 6.2 percent of original size [2023-08-30 21:31:59,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 36 [2023-08-30 21:31:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:59,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:32:04,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:04,148 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 240 treesize of output 156 [2023-08-30 21:32:04,253 INFO L321 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-08-30 21:32:04,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1014 treesize of output 972 [2023-08-30 21:32:04,295 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,302 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,305 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,308 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:32:04,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:04,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 337 treesize of output 378 [2023-08-30 21:32:04,506 INFO L321 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-08-30 21:32:04,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 333 treesize of output 323 [2023-08-30 21:32:11,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:11,688 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 240 treesize of output 156 [2023-08-30 21:32:11,746 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-08-30 21:32:11,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 482 treesize of output 431 [2023-08-30 21:32:11,814 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-08-30 21:32:11,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 415 treesize of output 329 [2023-08-30 21:32:11,880 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-08-30 21:32:11,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 282 treesize of output 247 [2023-08-30 21:32:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:12,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270668702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:32:12,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:32:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-08-30 21:32:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993430976] [2023-08-30 21:32:12,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:32:12,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 21:32:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:32:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 21:32:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1853, Unknown=5, NotChecked=0, Total=2352 [2023-08-30 21:32:14,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-30 21:32:14,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 2001 transitions, 43422 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:14,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:32:14,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-30 21:32:14,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:32:32,039 WARN L222 SmtUtils]: Spent 16.35s on a formula simplification. DAG size of input: 247 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:32:45,256 WARN L222 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 246 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:32:56,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:32:58,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:08,325 WARN L222 SmtUtils]: Spent 7.67s on a formula simplification. DAG size of input: 215 DAG size of output: 213 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:33:16,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:18,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:20,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:30,790 WARN L222 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 154 DAG size of output: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:33:39,511 WARN L222 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 170 DAG size of output: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:33:44,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:47,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:49,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:33:57,302 WARN L222 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 148 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:34:05,044 WARN L222 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 171 DAG size of output: 163 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:34:23,856 WARN L222 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:34:34,620 WARN L222 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 103 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:34:52,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:35:01,356 WARN L222 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 205 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:35:03,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:35:06,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:35:08,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:35:18,734 WARN L222 SmtUtils]: Spent 7.64s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:35:23,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:35:43,910 WARN L222 SmtUtils]: Spent 14.50s on a formula simplification. DAG size of input: 185 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:35:55,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:36:02,103 WARN L222 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 222 DAG size of output: 212 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:36:12,599 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 131 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:36:31,963 WARN L222 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 167 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:36:45,722 WARN L222 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 130 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:36:46,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:36:48,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:36:55,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:36:57,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:37:02,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:37:25,522 WARN L222 SmtUtils]: Spent 14.72s on a formula simplification. DAG size of input: 188 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:37:44,407 WARN L222 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 163 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:37:53,700 WARN L222 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 191 DAG size of output: 151 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:37:55,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:02,294 WARN L222 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 116 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:38:04,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:09,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:11,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:25,079 WARN L222 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 186 DAG size of output: 151 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:38:27,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:29,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:31,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:33,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:35,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:37,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:39,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:41,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:43,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:52,284 WARN L222 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 194 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:38:54,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:56,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:38:58,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:39:11,410 WARN L222 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 116 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:39:15,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:39:28,690 WARN L222 SmtUtils]: Spent 9.57s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:39:42,627 WARN L222 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:40:01,531 WARN L222 SmtUtils]: Spent 11.50s on a formula simplification. DAG size of input: 148 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:40:03,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:11,530 WARN L222 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 196 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:40:19,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:21,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:23,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:25,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:32,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:34,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:36,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:40:51,796 WARN L222 SmtUtils]: Spent 9.15s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:41:00,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:41:13,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:41:23,298 WARN L222 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 223 DAG size of output: 221 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:41:47,574 WARN L222 SmtUtils]: Spent 21.20s on a formula simplification. DAG size of input: 189 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:41:56,792 WARN L222 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 138 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:42:05,152 WARN L222 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 197 DAG size of output: 152 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:42:11,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:42:13,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:42:15,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:42:18,166 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] Killed by 15