./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:50:34,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:50:34,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:50:34,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:50:34,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:50:34,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:50:34,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:50:34,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:50:34,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:50:34,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:50:34,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:50:34,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:50:34,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:50:34,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:50:34,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:50:34,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:50:34,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:50:34,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:50:34,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:50:34,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:50:34,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:50:34,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:50:34,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:50:34,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:50:34,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:50:34,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:50:34,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:50:34,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:50:34,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:50:34,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:50:34,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:50:34,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:50:34,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:50:34,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:50:34,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:50:34,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:50:34,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:50:34,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:50:34,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:50:34,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:50:34,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:50:34,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:50:34,255 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:50:34,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:50:34,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:50:34,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:50:34,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:50:34,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:50:34,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:50:34,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:50:34,258 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:50:34,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:50:34,259 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:50:34,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:50:34,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:50:34,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:50:34,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:50:34,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:50:34,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:50:34,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:50:34,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:50:34,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:50:34,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:50:34,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:50:34,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:50:34,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:50:34,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:50:34,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:50:34,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:50:34,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:50:34,263 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:50:34,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:50:34,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:50:34,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:50:34,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:50:34,514 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:50:34,515 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:50:34,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-31 03:50:35,445 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:50:35,608 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:50:35,608 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-31 03:50:35,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7baa1ceee/561d35d17acf416e915f493f490bf050/FLAG81fbe029c [2023-08-31 03:50:35,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7baa1ceee/561d35d17acf416e915f493f490bf050 [2023-08-31 03:50:36,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:50:36,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:50:36,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:50:36,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:50:36,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:50:36,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e138ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36, skipping insertion in model container [2023-08-31 03:50:36,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:50:36,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:50:36,158 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-simple-queue.wvr.c[2438,2451] [2023-08-31 03:50:36,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:50:36,176 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:50:36,195 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-simple-queue.wvr.c[2438,2451] [2023-08-31 03:50:36,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:50:36,208 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:50:36,208 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:50:36,212 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:50:36,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36 WrapperNode [2023-08-31 03:50:36,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:50:36,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:50:36,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:50:36,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:50:36,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,254 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-08-31 03:50:36,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:50:36,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:50:36,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:50:36,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:50:36,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:50:36,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:50:36,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:50:36,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:50:36,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (1/1) ... [2023-08-31 03:50:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:50:36,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:36,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:50:36,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:50:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:50:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:50:36,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:50:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:50:36,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:50:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:50:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:50:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:50:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:50:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:50:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:50:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:50:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:50:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:50:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:50:36,355 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:50:36,425 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:50:36,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:50:36,628 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:50:36,684 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:50:36,684 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:50:36,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:50:36 BoogieIcfgContainer [2023-08-31 03:50:36,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:50:36,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:50:36,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:50:36,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:50:36,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:50:36" (1/3) ... [2023-08-31 03:50:36,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e8060a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:50:36, skipping insertion in model container [2023-08-31 03:50:36,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:50:36" (2/3) ... [2023-08-31 03:50:36,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e8060a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:50:36, skipping insertion in model container [2023-08-31 03:50:36,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:50:36" (3/3) ... [2023-08-31 03:50:36,691 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-08-31 03:50:36,696 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:50:36,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:50:36,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:50:36,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:50:36,748 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:50:36,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 246 flow [2023-08-31 03:50:36,808 INFO L130 PetriNetUnfolder]: 9/113 cut-off events. [2023-08-31 03:50:36,808 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:50:36,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 9/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-31 03:50:36,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 246 flow [2023-08-31 03:50:36,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2023-08-31 03:50:36,816 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:50:36,821 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2023-08-31 03:50:36,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2023-08-31 03:50:36,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2023-08-31 03:50:36,844 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2023-08-31 03:50:36,845 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:50:36,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-31 03:50:36,846 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-31 03:50:40,013 INFO L134 LiptonReduction]: Checked pairs total: 467 [2023-08-31 03:50:40,013 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-31 03:50:40,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:50:40,033 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;@41519e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:50:40,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:50:40,037 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-08-31 03:50:40,037 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:50:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:40,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:40,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1505763338, now seen corresponding path program 1 times [2023-08-31 03:50:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295982102] [2023-08-31 03:50:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:40,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:40,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295982102] [2023-08-31 03:50:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295982102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:50:40,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:50:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 03:50:40,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064468819] [2023-08-31 03:50:40,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:50:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:50:40,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:50:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:50:40,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-08-31 03:50:40,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:40,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-08-31 03:50:40,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:40,486 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2023-08-31 03:50:40,487 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 03:50:40,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 133 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-08-31 03:50:40,489 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-08-31 03:50:40,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-08-31 03:50:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:50:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:50:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-31 03:50:40,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2023-08-31 03:50:40,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-31 03:50:40,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-31 03:50:40,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:40,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-31 03:50:40,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,518 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 324 transitions. [2023-08-31 03:50:40,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-08-31 03:50:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:50:40,521 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-08-31 03:50:40,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-08-31 03:50:40,524 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-08-31 03:50:40,525 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-08-31 03:50:40,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:40,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:40,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:50:40,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:40,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336325, now seen corresponding path program 1 times [2023-08-31 03:50:40,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:40,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343385586] [2023-08-31 03:50:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:40,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:40,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343385586] [2023-08-31 03:50:40,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343385586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:50:40,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:50:40,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:50:40,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376452453] [2023-08-31 03:50:40,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:50:40,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:50:40,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:50:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:50:40,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-31 03:50:40,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:40,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-31 03:50:40,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:40,727 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2023-08-31 03:50:40,727 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-31 03:50:40,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 257 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-08-31 03:50:40,729 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-08-31 03:50:40,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-08-31 03:50:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:50:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:50:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-31 03:50:40,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46577380952380953 [2023-08-31 03:50:40,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-31 03:50:40,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-31 03:50:40,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:40,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-31 03:50:40,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,735 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 313 transitions. [2023-08-31 03:50:40,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-08-31 03:50:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:50:40,736 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-08-31 03:50:40,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, 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=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-08-31 03:50:40,737 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-08-31 03:50:40,737 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-08-31 03:50:40,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:40,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:50:40,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:40,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -128502642, now seen corresponding path program 1 times [2023-08-31 03:50:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172266213] [2023-08-31 03:50:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:50:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172266213] [2023-08-31 03:50:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172266213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:50:40,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:50:40,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:50:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896223242] [2023-08-31 03:50:40,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:50:40,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:50:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:50:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:50:40,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-31 03:50:40,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:40,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-31 03:50:40,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:40,932 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-08-31 03:50:40,932 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-31 03:50:40,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-08-31 03:50:40,934 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-08-31 03:50:40,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-08-31 03:50:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:50:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:50:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-08-31 03:50:40,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2023-08-31 03:50:40,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-08-31 03:50:40,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-08-31 03:50:40,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:40,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-08-31 03:50:40,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,938 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 411 transitions. [2023-08-31 03:50:40,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-08-31 03:50:40,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:50:40,940 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-08-31 03:50:40,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-31 03:50:40,941 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-08-31 03:50:40,943 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-08-31 03:50:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:40,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:40,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:50:40,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:40,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1064831031, now seen corresponding path program 1 times [2023-08-31 03:50:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:40,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691269796] [2023-08-31 03:50:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:41,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:41,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691269796] [2023-08-31 03:50:41,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691269796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:41,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104329219] [2023-08-31 03:50:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:41,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:41,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:41,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:50:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 03:50:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:41,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:50:41,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:50:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:41,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 03:50:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:41,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:41,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:41,970 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 57 treesize of output 45 [2023-08-31 03:50:41,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:41,982 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 178 treesize of output 162 [2023-08-31 03:50:42,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:42,000 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 52 treesize of output 48 [2023-08-31 03:50:42,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-31 03:50:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:42,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104329219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:42,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:42,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-31 03:50:42,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359708707] [2023-08-31 03:50:42,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 03:50:42,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:42,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 03:50:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=209, Unknown=4, NotChecked=0, Total=272 [2023-08-31 03:50:42,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 224 [2023-08-31 03:50:42,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:42,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:42,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 224 [2023-08-31 03:50:42,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:44,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:50:44,869 INFO L130 PetriNetUnfolder]: 225/436 cut-off events. [2023-08-31 03:50:44,869 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-08-31 03:50:44,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 436 events. 225/436 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1877 event pairs, 25 based on Foata normal form. 3/435 useless extension candidates. Maximal degree in co-relation 1067. Up to 120 conditions per place. [2023-08-31 03:50:44,871 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 74 selfloop transitions, 26 changer transitions 24/124 dead transitions. [2023-08-31 03:50:44,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 124 transitions, 628 flow [2023-08-31 03:50:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:50:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:50:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1295 transitions. [2023-08-31 03:50:44,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211805555555556 [2023-08-31 03:50:44,874 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1295 transitions. [2023-08-31 03:50:44,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1295 transitions. [2023-08-31 03:50:44,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:44,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1295 transitions. [2023-08-31 03:50:44,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.94444444444444) internal successors, (1295), 18 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:44,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:44,881 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:44,882 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 18 states and 1295 transitions. [2023-08-31 03:50:44,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 124 transitions, 628 flow [2023-08-31 03:50:44,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 124 transitions, 614 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-31 03:50:44,884 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 266 flow [2023-08-31 03:50:44,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=266, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-31 03:50:44,884 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 27 predicate places. [2023-08-31 03:50:44,885 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 266 flow [2023-08-31 03:50:44,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:44,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:44,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:44,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:45,090 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 [2023-08-31 03:50:45,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:45,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1849941358, now seen corresponding path program 2 times [2023-08-31 03:50:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66229106] [2023-08-31 03:50:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66229106] [2023-08-31 03:50:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66229106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694836938] [2023-08-31 03:50:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:50:45,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:45,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:45,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:45,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:50:45,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:50:45,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:45,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 03:50:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:50:45,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:45,890 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:50:45,890 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 24 treesize of output 11 [2023-08-31 03:50:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694836938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:45,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-08-31 03:50:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193887358] [2023-08-31 03:50:45,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 03:50:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 03:50:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-31 03:50:46,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-31 03:50:46,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 85.72727272727273) internal successors, (943), 11 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:46,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:46,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-31 03:50:46,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:46,363 INFO L130 PetriNetUnfolder]: 363/688 cut-off events. [2023-08-31 03:50:46,364 INFO L131 PetriNetUnfolder]: For 1019/1019 co-relation queries the response was YES. [2023-08-31 03:50:46,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 688 events. 363/688 cut-off events. For 1019/1019 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3374 event pairs, 65 based on Foata normal form. 1/687 useless extension candidates. Maximal degree in co-relation 1926. Up to 234 conditions per place. [2023-08-31 03:50:46,367 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 51 selfloop transitions, 27 changer transitions 16/94 dead transitions. [2023-08-31 03:50:46,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 94 transitions, 679 flow [2023-08-31 03:50:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 03:50:46,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 03:50:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 897 transitions. [2023-08-31 03:50:46,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004464285714286 [2023-08-31 03:50:46,370 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 897 transitions. [2023-08-31 03:50:46,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 897 transitions. [2023-08-31 03:50:46,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:46,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 897 transitions. [2023-08-31 03:50:46,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.7) internal successors, (897), 10 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:46,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:46,375 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:46,375 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 266 flow. Second operand 10 states and 897 transitions. [2023-08-31 03:50:46,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 94 transitions, 679 flow [2023-08-31 03:50:46,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 94 transitions, 633 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-08-31 03:50:46,382 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 408 flow [2023-08-31 03:50:46,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=408, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-31 03:50:46,383 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 37 predicate places. [2023-08-31 03:50:46,383 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 408 flow [2023-08-31 03:50:46,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 85.72727272727273) internal successors, (943), 11 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:46,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:46,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:46,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:46,589 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 [2023-08-31 03:50:46,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:46,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:46,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1698945970, now seen corresponding path program 3 times [2023-08-31 03:50:46,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:46,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424660249] [2023-08-31 03:50:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:46,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:50:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:46,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424660249] [2023-08-31 03:50:46,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424660249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:46,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78340606] [2023-08-31 03:50:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:50:46,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:46,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:46,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:50:46,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:50:46,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:50:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:46,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78340606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:46,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:46,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 03:50:46,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616696072] [2023-08-31 03:50:46,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:46,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:50:46,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:50:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:50:47,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2023-08-31 03:50:47,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 92.8) internal successors, (1392), 15 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:47,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:47,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2023-08-31 03:50:47,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:47,266 INFO L130 PetriNetUnfolder]: 431/861 cut-off events. [2023-08-31 03:50:47,266 INFO L131 PetriNetUnfolder]: For 2092/2092 co-relation queries the response was YES. [2023-08-31 03:50:47,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 conditions, 861 events. 431/861 cut-off events. For 2092/2092 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4696 event pairs, 114 based on Foata normal form. 58/918 useless extension candidates. Maximal degree in co-relation 2846. Up to 268 conditions per place. [2023-08-31 03:50:47,269 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 48 selfloop transitions, 16 changer transitions 31/95 dead transitions. [2023-08-31 03:50:47,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 95 transitions, 787 flow [2023-08-31 03:50:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:50:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:50:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 878 transitions. [2023-08-31 03:50:47,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435515873015873 [2023-08-31 03:50:47,272 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 878 transitions. [2023-08-31 03:50:47,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 878 transitions. [2023-08-31 03:50:47,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:47,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 878 transitions. [2023-08-31 03:50:47,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.55555555555556) internal successors, (878), 9 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:47,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:47,277 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:47,277 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 408 flow. Second operand 9 states and 878 transitions. [2023-08-31 03:50:47,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 95 transitions, 787 flow [2023-08-31 03:50:47,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 95 transitions, 739 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-31 03:50:47,283 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 407 flow [2023-08-31 03:50:47,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-08-31 03:50:47,285 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 39 predicate places. [2023-08-31 03:50:47,285 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 407 flow [2023-08-31 03:50:47,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 92.8) internal successors, (1392), 15 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:47,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:47,287 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:47,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:47,493 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 [2023-08-31 03:50:47,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:47,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash 532059832, now seen corresponding path program 4 times [2023-08-31 03:50:47,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746452276] [2023-08-31 03:50:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:48,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746452276] [2023-08-31 03:50:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746452276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:48,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335939434] [2023-08-31 03:50:48,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:50:48,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:48,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:50:48,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:50:48,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 03:50:48,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:48,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:48,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:50:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:50:48,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:48,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:48,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-31 03:50:48,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 03:50:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:50:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335939434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:48,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 18 [2023-08-31 03:50:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17204608] [2023-08-31 03:50:48,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:48,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:50:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:50:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2023-08-31 03:50:48,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 224 [2023-08-31 03:50:48,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 407 flow. Second operand has 20 states, 20 states have (on average 82.75) internal successors, (1655), 20 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:48,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:48,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 224 [2023-08-31 03:50:48,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:49,289 INFO L130 PetriNetUnfolder]: 461/894 cut-off events. [2023-08-31 03:50:49,289 INFO L131 PetriNetUnfolder]: For 2842/2842 co-relation queries the response was YES. [2023-08-31 03:50:49,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 894 events. 461/894 cut-off events. For 2842/2842 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4738 event pairs, 129 based on Foata normal form. 3/895 useless extension candidates. Maximal degree in co-relation 3282. Up to 279 conditions per place. [2023-08-31 03:50:49,293 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 57 selfloop transitions, 31 changer transitions 26/114 dead transitions. [2023-08-31 03:50:49,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 114 transitions, 968 flow [2023-08-31 03:50:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 03:50:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 03:50:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1061 transitions. [2023-08-31 03:50:49,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947172619047619 [2023-08-31 03:50:49,295 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1061 transitions. [2023-08-31 03:50:49,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1061 transitions. [2023-08-31 03:50:49,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:49,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1061 transitions. [2023-08-31 03:50:49,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:49,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:49,300 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:49,300 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 407 flow. Second operand 12 states and 1061 transitions. [2023-08-31 03:50:49,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 114 transitions, 968 flow [2023-08-31 03:50:49,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 114 transitions, 900 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-08-31 03:50:49,306 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 584 flow [2023-08-31 03:50:49,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=584, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-08-31 03:50:49,306 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2023-08-31 03:50:49,306 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 584 flow [2023-08-31 03:50:49,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 82.75) internal successors, (1655), 20 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:49,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:49,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:49,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:49,512 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 [2023-08-31 03:50:49,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:49,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash 301439904, now seen corresponding path program 5 times [2023-08-31 03:50:49,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:49,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264108241] [2023-08-31 03:50:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:49,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:49,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264108241] [2023-08-31 03:50:49,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264108241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:49,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717933480] [2023-08-31 03:50:49,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:50:49,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:49,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:49,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:50:49,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:50:49,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:49,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 03:50:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:50,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:50,072 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:50:50,073 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 25 treesize of output 13 [2023-08-31 03:50:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:50,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717933480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:50,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:50,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-31 03:50:50,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247791496] [2023-08-31 03:50:50,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:50,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:50:50,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:50:50,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:50:50,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-08-31 03:50:50,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 584 flow. Second operand has 24 states, 24 states have (on average 84.0) internal successors, (2016), 24 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:50,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:50,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-08-31 03:50:50,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:52,050 INFO L130 PetriNetUnfolder]: 1161/2184 cut-off events. [2023-08-31 03:50:52,050 INFO L131 PetriNetUnfolder]: For 7755/7755 co-relation queries the response was YES. [2023-08-31 03:50:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 2184 events. 1161/2184 cut-off events. For 7755/7755 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13877 event pairs, 103 based on Foata normal form. 11/2195 useless extension candidates. Maximal degree in co-relation 6099. Up to 434 conditions per place. [2023-08-31 03:50:52,058 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 159 selfloop transitions, 90 changer transitions 68/317 dead transitions. [2023-08-31 03:50:52,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 317 transitions, 2517 flow [2023-08-31 03:50:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 03:50:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 03:50:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3067 transitions. [2023-08-31 03:50:52,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027048319327731 [2023-08-31 03:50:52,064 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3067 transitions. [2023-08-31 03:50:52,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3067 transitions. [2023-08-31 03:50:52,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:52,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3067 transitions. [2023-08-31 03:50:52,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.20588235294117) internal successors, (3067), 34 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:52,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:52,077 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:52,077 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 584 flow. Second operand 34 states and 3067 transitions. [2023-08-31 03:50:52,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 317 transitions, 2517 flow [2023-08-31 03:50:52,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 317 transitions, 2403 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-08-31 03:50:52,086 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 1583 flow [2023-08-31 03:50:52,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1583, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2023-08-31 03:50:52,086 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 86 predicate places. [2023-08-31 03:50:52,086 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 1583 flow [2023-08-31 03:50:52,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.0) internal successors, (2016), 24 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:52,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:52,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:52,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:52,292 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 [2023-08-31 03:50:52,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:52,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:52,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1519550220, now seen corresponding path program 6 times [2023-08-31 03:50:52,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:52,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065416142] [2023-08-31 03:50:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:52,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:52,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:52,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065416142] [2023-08-31 03:50:52,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065416142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:52,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170410709] [2023-08-31 03:50:52,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:50:52,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:52,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:52,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:50:52,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:50:52,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:52,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:50:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:53,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:50:53,228 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:50:53,228 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 23 treesize of output 10 [2023-08-31 03:50:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:53,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:53,280 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) is different from false [2023-08-31 03:50:53,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:53,292 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 44 treesize of output 37 [2023-08-31 03:50:53,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-31 03:50:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-31 03:50:53,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170410709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:53,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:53,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 03:50:53,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770336564] [2023-08-31 03:50:53,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:53,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:50:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:50:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=561, Unknown=1, NotChecked=48, Total=702 [2023-08-31 03:50:53,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-08-31 03:50:53,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 1583 flow. Second operand has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:53,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:53,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-08-31 03:50:53,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:56,348 INFO L130 PetriNetUnfolder]: 1921/3564 cut-off events. [2023-08-31 03:50:56,349 INFO L131 PetriNetUnfolder]: For 38507/38507 co-relation queries the response was YES. [2023-08-31 03:50:56,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17718 conditions, 3564 events. 1921/3564 cut-off events. For 38507/38507 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22718 event pairs, 296 based on Foata normal form. 15/3579 useless extension candidates. Maximal degree in co-relation 15380. Up to 704 conditions per place. [2023-08-31 03:50:56,375 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 165 selfloop transitions, 153 changer transitions 42/360 dead transitions. [2023-08-31 03:50:56,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 360 transitions, 4471 flow [2023-08-31 03:50:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 03:50:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 03:50:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2317 transitions. [2023-08-31 03:50:56,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3336693548387097 [2023-08-31 03:50:56,382 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2317 transitions. [2023-08-31 03:50:56,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2317 transitions. [2023-08-31 03:50:56,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:56,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2317 transitions. [2023-08-31 03:50:56,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 74.74193548387096) internal successors, (2317), 31 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:56,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:56,396 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:56,396 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 1583 flow. Second operand 31 states and 2317 transitions. [2023-08-31 03:50:56,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 360 transitions, 4471 flow [2023-08-31 03:50:56,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 360 transitions, 3903 flow, removed 279 selfloop flow, removed 4 redundant places. [2023-08-31 03:50:56,465 INFO L231 Difference]: Finished difference. Result has 145 places, 212 transitions, 3202 flow [2023-08-31 03:50:56,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3202, PETRI_PLACES=145, PETRI_TRANSITIONS=212} [2023-08-31 03:50:56,466 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 126 predicate places. [2023-08-31 03:50:56,466 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 212 transitions, 3202 flow [2023-08-31 03:50:56,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:56,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:56,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:56,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:56,671 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 [2023-08-31 03:50:56,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:56,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1225383947, now seen corresponding path program 7 times [2023-08-31 03:50:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551971861] [2023-08-31 03:50:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551971861] [2023-08-31 03:50:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551971861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161958202] [2023-08-31 03:50:56,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:50:56,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:56,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:56,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:56,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:50:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:50:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161958202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:56,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 11 [2023-08-31 03:50:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211406466] [2023-08-31 03:50:56,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:56,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:50:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:50:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:50:56,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-31 03:50:56,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 212 transitions, 3202 flow. Second operand has 12 states, 12 states have (on average 99.75) internal successors, (1197), 12 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:56,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:56,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-31 03:50:56,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:57,754 INFO L130 PetriNetUnfolder]: 3133/5864 cut-off events. [2023-08-31 03:50:57,754 INFO L131 PetriNetUnfolder]: For 78234/78234 co-relation queries the response was YES. [2023-08-31 03:50:57,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38796 conditions, 5864 events. 3133/5864 cut-off events. For 78234/78234 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 42223 event pairs, 800 based on Foata normal form. 48/5912 useless extension candidates. Maximal degree in co-relation 37374. Up to 2953 conditions per place. [2023-08-31 03:50:57,790 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 212 selfloop transitions, 151 changer transitions 0/363 dead transitions. [2023-08-31 03:50:57,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 363 transitions, 6234 flow [2023-08-31 03:50:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:50:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:50:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-08-31 03:50:57,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2023-08-31 03:50:57,792 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-08-31 03:50:57,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-08-31 03:50:57,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:57,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-08-31 03:50:57,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:57,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:57,794 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:57,794 INFO L175 Difference]: Start difference. First operand has 145 places, 212 transitions, 3202 flow. Second operand 5 states and 528 transitions. [2023-08-31 03:50:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 363 transitions, 6234 flow [2023-08-31 03:50:57,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 363 transitions, 5014 flow, removed 596 selfloop flow, removed 8 redundant places. [2023-08-31 03:50:57,978 INFO L231 Difference]: Finished difference. Result has 144 places, 331 transitions, 4731 flow [2023-08-31 03:50:57,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4731, PETRI_PLACES=144, PETRI_TRANSITIONS=331} [2023-08-31 03:50:57,979 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 125 predicate places. [2023-08-31 03:50:57,979 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 331 transitions, 4731 flow [2023-08-31 03:50:57,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.75) internal successors, (1197), 12 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:57,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:57,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:57,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-31 03:50:58,184 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 [2023-08-31 03:50:58,184 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:58,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:58,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2073950995, now seen corresponding path program 8 times [2023-08-31 03:50:58,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:58,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247205530] [2023-08-31 03:50:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247205530] [2023-08-31 03:50:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247205530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184509945] [2023-08-31 03:50:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:50:58,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:58,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:58,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:50:59,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:50:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-31 03:50:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:50:59,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:59,093 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:50:59,094 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 24 treesize of output 11 [2023-08-31 03:50:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:50:59,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184509945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:59,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:59,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 13 [2023-08-31 03:50:59,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720239138] [2023-08-31 03:50:59,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:50:59,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:50:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:50:59,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-08-31 03:50:59,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 331 transitions, 4731 flow. Second operand has 15 states, 15 states have (on average 84.13333333333334) internal successors, (1262), 15 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:59,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:59,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-08-31 03:50:59,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:01,298 INFO L130 PetriNetUnfolder]: 3303/6176 cut-off events. [2023-08-31 03:51:01,298 INFO L131 PetriNetUnfolder]: For 60096/60096 co-relation queries the response was YES. [2023-08-31 03:51:01,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36448 conditions, 6176 events. 3303/6176 cut-off events. For 60096/60096 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 44594 event pairs, 787 based on Foata normal form. 11/6187 useless extension candidates. Maximal degree in co-relation 35314. Up to 3581 conditions per place. [2023-08-31 03:51:01,327 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 309 selfloop transitions, 124 changer transitions 77/510 dead transitions. [2023-08-31 03:51:01,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 510 transitions, 7245 flow [2023-08-31 03:51:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:51:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:51:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2151 transitions. [2023-08-31 03:51:01,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40011160714285715 [2023-08-31 03:51:01,330 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2151 transitions. [2023-08-31 03:51:01,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2151 transitions. [2023-08-31 03:51:01,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:01,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2151 transitions. [2023-08-31 03:51:01,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.625) internal successors, (2151), 24 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:01,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:01,341 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:01,341 INFO L175 Difference]: Start difference. First operand has 144 places, 331 transitions, 4731 flow. Second operand 24 states and 2151 transitions. [2023-08-31 03:51:01,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 510 transitions, 7245 flow [2023-08-31 03:51:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 510 transitions, 7122 flow, removed 46 selfloop flow, removed 1 redundant places. [2023-08-31 03:51:01,487 INFO L231 Difference]: Finished difference. Result has 173 places, 349 transitions, 5340 flow [2023-08-31 03:51:01,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5340, PETRI_PLACES=173, PETRI_TRANSITIONS=349} [2023-08-31 03:51:01,488 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 154 predicate places. [2023-08-31 03:51:01,488 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 349 transitions, 5340 flow [2023-08-31 03:51:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.13333333333334) internal successors, (1262), 15 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:01,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:01,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:01,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:01,693 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 [2023-08-31 03:51:01,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:01,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1524792205, now seen corresponding path program 9 times [2023-08-31 03:51:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:01,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970277568] [2023-08-31 03:51:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:01,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:02,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:02,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970277568] [2023-08-31 03:51:02,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970277568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:02,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541439296] [2023-08-31 03:51:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:51:02,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:02,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:51:02,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:51:02,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:51:02,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 03:51:02,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:02,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:02,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 03:51:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:51:02,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:02,578 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_360 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_360) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2023-08-31 03:51:02,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:02,589 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 44 treesize of output 37 [2023-08-31 03:51:02,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-31 03:51:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-31 03:51:02,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541439296] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:02,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:02,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 20 [2023-08-31 03:51:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150354199] [2023-08-31 03:51:02,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:02,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:51:02,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:51:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2023-08-31 03:51:02,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-08-31 03:51:02,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 349 transitions, 5340 flow. Second operand has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:02,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:02,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-08-31 03:51:02,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:04,173 INFO L130 PetriNetUnfolder]: 3513/6545 cut-off events. [2023-08-31 03:51:04,174 INFO L131 PetriNetUnfolder]: For 72647/72647 co-relation queries the response was YES. [2023-08-31 03:51:04,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39778 conditions, 6545 events. 3513/6545 cut-off events. For 72647/72647 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 47640 event pairs, 700 based on Foata normal form. 4/6549 useless extension candidates. Maximal degree in co-relation 38427. Up to 2567 conditions per place. [2023-08-31 03:51:04,207 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 254 selfloop transitions, 197 changer transitions 48/499 dead transitions. [2023-08-31 03:51:04,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 499 transitions, 7695 flow [2023-08-31 03:51:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:51:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:51:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1334 transitions. [2023-08-31 03:51:04,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3308531746031746 [2023-08-31 03:51:04,209 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1334 transitions. [2023-08-31 03:51:04,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1334 transitions. [2023-08-31 03:51:04,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:04,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1334 transitions. [2023-08-31 03:51:04,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 74.11111111111111) internal successors, (1334), 18 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:04,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:04,214 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:04,214 INFO L175 Difference]: Start difference. First operand has 173 places, 349 transitions, 5340 flow. Second operand 18 states and 1334 transitions. [2023-08-31 03:51:04,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 499 transitions, 7695 flow [2023-08-31 03:51:04,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 499 transitions, 7474 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-31 03:51:04,423 INFO L231 Difference]: Finished difference. Result has 179 places, 374 transitions, 6058 flow [2023-08-31 03:51:04,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6058, PETRI_PLACES=179, PETRI_TRANSITIONS=374} [2023-08-31 03:51:04,424 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 160 predicate places. [2023-08-31 03:51:04,424 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 374 transitions, 6058 flow [2023-08-31 03:51:04,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:04,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:04,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:04,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 03:51:04,629 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 [2023-08-31 03:51:04,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:04,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash -745079618, now seen corresponding path program 10 times [2023-08-31 03:51:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:04,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208953112] [2023-08-31 03:51:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:04,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:51:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208953112] [2023-08-31 03:51:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208953112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678848611] [2023-08-31 03:51:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:51:04,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:04,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:51:04,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:51:04,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:51:04,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:04,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:51:04,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:51:04,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:51:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678848611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:04,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:04,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:51:04,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911494731] [2023-08-31 03:51:04,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:51:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:51:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:51:05,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 224 [2023-08-31 03:51:05,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 374 transitions, 6058 flow. Second operand has 18 states, 18 states have (on average 93.77777777777777) internal successors, (1688), 18 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:05,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:05,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 224 [2023-08-31 03:51:05,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:05,604 INFO L130 PetriNetUnfolder]: 1577/3043 cut-off events. [2023-08-31 03:51:05,605 INFO L131 PetriNetUnfolder]: For 40899/40899 co-relation queries the response was YES. [2023-08-31 03:51:05,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21495 conditions, 3043 events. 1577/3043 cut-off events. For 40899/40899 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20977 event pairs, 982 based on Foata normal form. 48/3091 useless extension candidates. Maximal degree in co-relation 21314. Up to 2623 conditions per place. [2023-08-31 03:51:05,617 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 130 selfloop transitions, 4 changer transitions 42/176 dead transitions. [2023-08-31 03:51:05,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 176 transitions, 3425 flow [2023-08-31 03:51:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:51:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:51:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 785 transitions. [2023-08-31 03:51:05,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380580357142857 [2023-08-31 03:51:05,630 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 785 transitions. [2023-08-31 03:51:05,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 785 transitions. [2023-08-31 03:51:05,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:05,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 785 transitions. [2023-08-31 03:51:05,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.125) internal successors, (785), 8 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:05,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:05,633 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:05,633 INFO L175 Difference]: Start difference. First operand has 179 places, 374 transitions, 6058 flow. Second operand 8 states and 785 transitions. [2023-08-31 03:51:05,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 176 transitions, 3425 flow [2023-08-31 03:51:05,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 2908 flow, removed 120 selfloop flow, removed 31 redundant places. [2023-08-31 03:51:05,711 INFO L231 Difference]: Finished difference. Result has 127 places, 134 transitions, 2153 flow [2023-08-31 03:51:05,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2153, PETRI_PLACES=127, PETRI_TRANSITIONS=134} [2023-08-31 03:51:05,713 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 108 predicate places. [2023-08-31 03:51:05,713 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 134 transitions, 2153 flow [2023-08-31 03:51:05,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.77777777777777) internal successors, (1688), 18 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:05,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:05,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:05,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:05,918 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 [2023-08-31 03:51:05,918 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:05,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1861217871, now seen corresponding path program 11 times [2023-08-31 03:51:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157498116] [2023-08-31 03:51:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:06,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:06,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157498116] [2023-08-31 03:51:06,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157498116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:06,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959740792] [2023-08-31 03:51:06,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:51:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:06,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:06,258 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) [2023-08-31 03:51:06,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:51:06,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:51:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 03:51:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:06,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:51:06,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:51:06,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:51:06,682 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:51:06,683 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 23 treesize of output 10 [2023-08-31 03:51:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:06,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:07,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:07,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-08-31 03:51:07,200 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:51:07,201 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 300 treesize of output 271 [2023-08-31 03:51:07,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:07,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-08-31 03:51:07,218 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:51:07,220 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 91 treesize of output 67 [2023-08-31 03:51:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959740792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:07,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-08-31 03:51:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623753518] [2023-08-31 03:51:07,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:51:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:51:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=991, Unknown=2, NotChecked=0, Total=1190 [2023-08-31 03:51:08,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-08-31 03:51:08,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 134 transitions, 2153 flow. Second operand has 35 states, 35 states have (on average 65.62857142857143) internal successors, (2297), 35 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:08,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:08,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-08-31 03:51:08,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:10,771 INFO L130 PetriNetUnfolder]: 2250/4303 cut-off events. [2023-08-31 03:51:10,772 INFO L131 PetriNetUnfolder]: For 30662/30662 co-relation queries the response was YES. [2023-08-31 03:51:10,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 4303 events. 2250/4303 cut-off events. For 30662/30662 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31118 event pairs, 487 based on Foata normal form. 86/4389 useless extension candidates. Maximal degree in co-relation 20714. Up to 2039 conditions per place. [2023-08-31 03:51:10,788 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 71 selfloop transitions, 27 changer transitions 253/351 dead transitions. [2023-08-31 03:51:10,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 351 transitions, 4643 flow [2023-08-31 03:51:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 03:51:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 03:51:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1925 transitions. [2023-08-31 03:51:10,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31828703703703703 [2023-08-31 03:51:10,791 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1925 transitions. [2023-08-31 03:51:10,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1925 transitions. [2023-08-31 03:51:10,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:10,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1925 transitions. [2023-08-31 03:51:10,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 71.29629629629629) internal successors, (1925), 27 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:10,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:10,798 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:10,799 INFO L175 Difference]: Start difference. First operand has 127 places, 134 transitions, 2153 flow. Second operand 27 states and 1925 transitions. [2023-08-31 03:51:10,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 351 transitions, 4643 flow [2023-08-31 03:51:10,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 351 transitions, 4461 flow, removed 52 selfloop flow, removed 14 redundant places. [2023-08-31 03:51:10,847 INFO L231 Difference]: Finished difference. Result has 132 places, 93 transitions, 1545 flow [2023-08-31 03:51:10,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1545, PETRI_PLACES=132, PETRI_TRANSITIONS=93} [2023-08-31 03:51:10,847 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2023-08-31 03:51:10,847 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 93 transitions, 1545 flow [2023-08-31 03:51:10,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 65.62857142857143) internal successors, (2297), 35 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:10,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:10,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:10,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:11,054 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 [2023-08-31 03:51:11,055 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:11,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1230640788, now seen corresponding path program 12 times [2023-08-31 03:51:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284068947] [2023-08-31 03:51:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:11,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284068947] [2023-08-31 03:51:11,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284068947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186602766] [2023-08-31 03:51:11,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:51:11,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:11,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:11,570 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) [2023-08-31 03:51:11,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:51:11,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:51:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:51:11,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:51:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:11,951 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:51:11,952 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 25 treesize of output 13 [2023-08-31 03:51:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:51:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186602766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:11,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:11,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 21 [2023-08-31 03:51:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243254909] [2023-08-31 03:51:11,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:11,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:51:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:51:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:51:12,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-08-31 03:51:12,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 93 transitions, 1545 flow. Second operand has 23 states, 23 states have (on average 85.82608695652173) internal successors, (1974), 23 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:12,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:12,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-08-31 03:51:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:13,939 INFO L130 PetriNetUnfolder]: 1595/2965 cut-off events. [2023-08-31 03:51:13,939 INFO L131 PetriNetUnfolder]: For 31085/31085 co-relation queries the response was YES. [2023-08-31 03:51:13,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16176 conditions, 2965 events. 1595/2965 cut-off events. For 31085/31085 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19452 event pairs, 112 based on Foata normal form. 12/2977 useless extension candidates. Maximal degree in co-relation 16106. Up to 1369 conditions per place. [2023-08-31 03:51:13,950 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 170 selfloop transitions, 142 changer transitions 147/459 dead transitions. [2023-08-31 03:51:13,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 459 transitions, 5129 flow [2023-08-31 03:51:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 03:51:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 03:51:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4508 transitions. [2023-08-31 03:51:13,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-08-31 03:51:13,954 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4508 transitions. [2023-08-31 03:51:13,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4508 transitions. [2023-08-31 03:51:13,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:13,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4508 transitions. [2023-08-31 03:51:13,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 92.0) internal successors, (4508), 49 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:13,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 224.0) internal successors, (11200), 50 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:13,972 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 224.0) internal successors, (11200), 50 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:13,972 INFO L175 Difference]: Start difference. First operand has 132 places, 93 transitions, 1545 flow. Second operand 49 states and 4508 transitions. [2023-08-31 03:51:13,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 459 transitions, 5129 flow [2023-08-31 03:51:14,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 459 transitions, 4530 flow, removed 245 selfloop flow, removed 25 redundant places. [2023-08-31 03:51:14,042 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 2742 flow [2023-08-31 03:51:14,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2742, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2023-08-31 03:51:14,043 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 116 predicate places. [2023-08-31 03:51:14,043 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 2742 flow [2023-08-31 03:51:14,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.82608695652173) internal successors, (1974), 23 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:14,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:14,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:14,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:14,247 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 [2023-08-31 03:51:14,247 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:14,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:14,248 INFO L85 PathProgramCache]: Analyzing trace with hash 739662308, now seen corresponding path program 13 times [2023-08-31 03:51:14,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:14,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113270303] [2023-08-31 03:51:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:14,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:14,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113270303] [2023-08-31 03:51:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113270303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422942325] [2023-08-31 03:51:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:51:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:14,837 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) [2023-08-31 03:51:14,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:51:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:51:14,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:15,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 03:51:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:51:15,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:15,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:15,249 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 44 treesize of output 37 [2023-08-31 03:51:15,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-31 03:51:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:51:15,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422942325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:15,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:15,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 29 [2023-08-31 03:51:15,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103438161] [2023-08-31 03:51:15,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:15,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:51:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:15,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:51:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=840, Unknown=4, NotChecked=0, Total=930 [2023-08-31 03:51:15,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-08-31 03:51:15,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 2742 flow. Second operand has 31 states, 31 states have (on average 68.61290322580645) internal successors, (2127), 31 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:15,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:15,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-08-31 03:51:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:17,013 INFO L130 PetriNetUnfolder]: 1643/3052 cut-off events. [2023-08-31 03:51:17,013 INFO L131 PetriNetUnfolder]: For 26023/26023 co-relation queries the response was YES. [2023-08-31 03:51:17,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15834 conditions, 3052 events. 1643/3052 cut-off events. For 26023/26023 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20148 event pairs, 155 based on Foata normal form. 1/3053 useless extension candidates. Maximal degree in co-relation 15045. Up to 1405 conditions per place. [2023-08-31 03:51:17,023 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 83 selfloop transitions, 141 changer transitions 61/285 dead transitions. [2023-08-31 03:51:17,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 285 transitions, 3902 flow [2023-08-31 03:51:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:51:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:51:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1778 transitions. [2023-08-31 03:51:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307291666666667 [2023-08-31 03:51:17,025 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1778 transitions. [2023-08-31 03:51:17,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1778 transitions. [2023-08-31 03:51:17,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:17,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1778 transitions. [2023-08-31 03:51:17,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 74.08333333333333) internal successors, (1778), 24 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:17,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:17,031 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:17,031 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 2742 flow. Second operand 24 states and 1778 transitions. [2023-08-31 03:51:17,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 285 transitions, 3902 flow [2023-08-31 03:51:17,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 285 transitions, 3399 flow, removed 165 selfloop flow, removed 13 redundant places. [2023-08-31 03:51:17,080 INFO L231 Difference]: Finished difference. Result has 146 places, 164 transitions, 2634 flow [2023-08-31 03:51:17,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2634, PETRI_PLACES=146, PETRI_TRANSITIONS=164} [2023-08-31 03:51:17,081 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 127 predicate places. [2023-08-31 03:51:17,081 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 164 transitions, 2634 flow [2023-08-31 03:51:17,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 68.61290322580645) internal successors, (2127), 31 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:17,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:17,082 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:17,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:17,282 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 [2023-08-31 03:51:17,282 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:17,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1469727225, now seen corresponding path program 14 times [2023-08-31 03:51:17,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:17,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724586531] [2023-08-31 03:51:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:17,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:51:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724586531] [2023-08-31 03:51:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724586531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648908231] [2023-08-31 03:51:17,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:51:17,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:17,381 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) [2023-08-31 03:51:17,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:51:17,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:51:17,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:51:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:51:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:51:17,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648908231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:17,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:17,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-08-31 03:51:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449375962] [2023-08-31 03:51:17,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:51:17,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:51:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:51:17,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-08-31 03:51:17,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 164 transitions, 2634 flow. Second operand has 14 states, 14 states have (on average 101.21428571428571) internal successors, (1417), 14 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:17,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:17,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-08-31 03:51:17,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:18,181 INFO L130 PetriNetUnfolder]: 3085/5688 cut-off events. [2023-08-31 03:51:18,181 INFO L131 PetriNetUnfolder]: For 45118/45118 co-relation queries the response was YES. [2023-08-31 03:51:18,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27342 conditions, 5688 events. 3085/5688 cut-off events. For 45118/45118 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41495 event pairs, 547 based on Foata normal form. 18/5706 useless extension candidates. Maximal degree in co-relation 25015. Up to 2505 conditions per place. [2023-08-31 03:51:18,206 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 112 selfloop transitions, 178 changer transitions 0/290 dead transitions. [2023-08-31 03:51:18,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 290 transitions, 5191 flow [2023-08-31 03:51:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:51:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:51:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 647 transitions. [2023-08-31 03:51:18,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48139880952380953 [2023-08-31 03:51:18,208 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 647 transitions. [2023-08-31 03:51:18,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 647 transitions. [2023-08-31 03:51:18,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:18,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 647 transitions. [2023-08-31 03:51:18,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.83333333333333) internal successors, (647), 6 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:18,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:18,210 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:18,210 INFO L175 Difference]: Start difference. First operand has 146 places, 164 transitions, 2634 flow. Second operand 6 states and 647 transitions. [2023-08-31 03:51:18,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 290 transitions, 5191 flow [2023-08-31 03:51:18,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 290 transitions, 4986 flow, removed 44 selfloop flow, removed 11 redundant places. [2023-08-31 03:51:18,284 INFO L231 Difference]: Finished difference. Result has 141 places, 256 transitions, 4599 flow [2023-08-31 03:51:18,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4599, PETRI_PLACES=141, PETRI_TRANSITIONS=256} [2023-08-31 03:51:18,285 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 122 predicate places. [2023-08-31 03:51:18,285 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 256 transitions, 4599 flow [2023-08-31 03:51:18,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 101.21428571428571) internal successors, (1417), 14 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:18,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:18,286 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:18,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:18,490 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 [2023-08-31 03:51:18,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:18,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -876090930, now seen corresponding path program 15 times [2023-08-31 03:51:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:18,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677012263] [2023-08-31 03:51:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677012263] [2023-08-31 03:51:18,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677012263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907382575] [2023-08-31 03:51:18,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:51:18,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:18,893 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) [2023-08-31 03:51:18,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:51:19,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:51:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:19,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-31 03:51:19,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 03:51:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:19,262 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:51:19,262 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 25 treesize of output 13 [2023-08-31 03:51:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 03:51:19,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907382575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:19,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:19,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-08-31 03:51:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184909482] [2023-08-31 03:51:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:19,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:51:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:51:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:51:19,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-08-31 03:51:19,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 256 transitions, 4599 flow. Second operand has 23 states, 23 states have (on average 85.65217391304348) internal successors, (1970), 23 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:19,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:19,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-08-31 03:51:19,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:22,575 INFO L130 PetriNetUnfolder]: 3390/6380 cut-off events. [2023-08-31 03:51:22,575 INFO L131 PetriNetUnfolder]: For 51943/51943 co-relation queries the response was YES. [2023-08-31 03:51:22,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31783 conditions, 6380 events. 3390/6380 cut-off events. For 51943/51943 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 48155 event pairs, 192 based on Foata normal form. 166/6546 useless extension candidates. Maximal degree in co-relation 29523. Up to 2865 conditions per place. [2023-08-31 03:51:22,601 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 203 selfloop transitions, 246 changer transitions 378/827 dead transitions. [2023-08-31 03:51:22,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 827 transitions, 9125 flow [2023-08-31 03:51:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-31 03:51:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-31 03:51:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7826 transitions. [2023-08-31 03:51:22,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102941176470587 [2023-08-31 03:51:22,606 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7826 transitions. [2023-08-31 03:51:22,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7826 transitions. [2023-08-31 03:51:22,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:22,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7826 transitions. [2023-08-31 03:51:22,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 92.07058823529412) internal successors, (7826), 85 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:22,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 224.0) internal successors, (19264), 86 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:22,625 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 224.0) internal successors, (19264), 86 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:22,625 INFO L175 Difference]: Start difference. First operand has 141 places, 256 transitions, 4599 flow. Second operand 85 states and 7826 transitions. [2023-08-31 03:51:22,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 827 transitions, 9125 flow [2023-08-31 03:51:22,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 827 transitions, 8815 flow, removed 155 selfloop flow, removed 0 redundant places. [2023-08-31 03:51:22,811 INFO L231 Difference]: Finished difference. Result has 247 places, 270 transitions, 5294 flow [2023-08-31 03:51:22,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=5294, PETRI_PLACES=247, PETRI_TRANSITIONS=270} [2023-08-31 03:51:22,812 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 228 predicate places. [2023-08-31 03:51:22,812 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 270 transitions, 5294 flow [2023-08-31 03:51:22,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.65217391304348) internal successors, (1970), 23 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:22,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:22,813 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:22,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-31 03:51:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:51:23,013 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:23,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1260842560, now seen corresponding path program 16 times [2023-08-31 03:51:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:23,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936703317] [2023-08-31 03:51:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:23,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:23,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936703317] [2023-08-31 03:51:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936703317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786007963] [2023-08-31 03:51:23,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:51:23,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:23,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:23,456 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:51:23,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:51:23,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:51:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:51:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:23,988 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:51:23,989 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 23 treesize of output 10 [2023-08-31 03:51:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:23,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:24,109 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:51:24,110 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 25 treesize of output 13 [2023-08-31 03:51:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:24,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786007963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:24,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:24,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-31 03:51:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212000204] [2023-08-31 03:51:24,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-31 03:51:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-31 03:51:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2023-08-31 03:51:25,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-08-31 03:51:25,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 270 transitions, 5294 flow. Second operand has 42 states, 42 states have (on average 83.57142857142857) internal successors, (3510), 42 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:25,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:25,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-08-31 03:51:25,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:36,416 INFO L130 PetriNetUnfolder]: 6255/11684 cut-off events. [2023-08-31 03:51:36,416 INFO L131 PetriNetUnfolder]: For 179828/179828 co-relation queries the response was YES. [2023-08-31 03:51:36,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70482 conditions, 11684 events. 6255/11684 cut-off events. For 179828/179828 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 90533 event pairs, 987 based on Foata normal form. 32/11716 useless extension candidates. Maximal degree in co-relation 69846. Up to 5115 conditions per place. [2023-08-31 03:51:36,481 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 612 selfloop transitions, 362 changer transitions 118/1092 dead transitions. [2023-08-31 03:51:36,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1092 transitions, 18415 flow [2023-08-31 03:51:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-31 03:51:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-31 03:51:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7863 transitions. [2023-08-31 03:51:36,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40347906403940886 [2023-08-31 03:51:36,488 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7863 transitions. [2023-08-31 03:51:36,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7863 transitions. [2023-08-31 03:51:36,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:36,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7863 transitions. [2023-08-31 03:51:36,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 90.37931034482759) internal successors, (7863), 87 states have internal predecessors, (7863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:36,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 224.0) internal successors, (19712), 88 states have internal predecessors, (19712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:36,508 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 224.0) internal successors, (19712), 88 states have internal predecessors, (19712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:36,508 INFO L175 Difference]: Start difference. First operand has 247 places, 270 transitions, 5294 flow. Second operand 87 states and 7863 transitions. [2023-08-31 03:51:36,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1092 transitions, 18415 flow [2023-08-31 03:51:37,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1092 transitions, 17120 flow, removed 311 selfloop flow, removed 37 redundant places. [2023-08-31 03:51:37,057 INFO L231 Difference]: Finished difference. Result has 315 places, 562 transitions, 12634 flow [2023-08-31 03:51:37,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=4584, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=12634, PETRI_PLACES=315, PETRI_TRANSITIONS=562} [2023-08-31 03:51:37,058 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 296 predicate places. [2023-08-31 03:51:37,058 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 562 transitions, 12634 flow [2023-08-31 03:51:37,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 83.57142857142857) internal successors, (3510), 42 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:37,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:37,059 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:37,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:37,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:37,259 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:37,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1520078234, now seen corresponding path program 17 times [2023-08-31 03:51:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:37,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308094966] [2023-08-31 03:51:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:37,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:37,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308094966] [2023-08-31 03:51:37,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308094966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:37,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251895976] [2023-08-31 03:51:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:51:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:37,992 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:51:37,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:51:38,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:51:38,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:38,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-31 03:51:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:38,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:51:38,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:51:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:38,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:51:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:39,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:39,175 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 59 treesize of output 47 [2023-08-31 03:51:39,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:39,182 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 188 treesize of output 169 [2023-08-31 03:51:39,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:39,195 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 54 treesize of output 48 [2023-08-31 03:51:39,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-08-31 03:51:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:39,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251895976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:39,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:39,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-31 03:51:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817695359] [2023-08-31 03:51:39,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-31 03:51:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-31 03:51:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1723, Unknown=5, NotChecked=0, Total=1980 [2023-08-31 03:51:41,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 224 [2023-08-31 03:51:41,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 562 transitions, 12634 flow. Second operand has 45 states, 45 states have (on average 78.46666666666667) internal successors, (3531), 45 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:41,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:41,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 224 [2023-08-31 03:51:41,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:44,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:56,364 INFO L130 PetriNetUnfolder]: 12034/22278 cut-off events. [2023-08-31 03:51:56,364 INFO L131 PetriNetUnfolder]: For 506825/506825 co-relation queries the response was YES. [2023-08-31 03:51:56,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149996 conditions, 22278 events. 12034/22278 cut-off events. For 506825/506825 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 185530 event pairs, 2309 based on Foata normal form. 2/22280 useless extension candidates. Maximal degree in co-relation 149277. Up to 9482 conditions per place. [2023-08-31 03:51:56,529 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1138 selfloop transitions, 670 changer transitions 170/1978 dead transitions. [2023-08-31 03:51:56,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1978 transitions, 41361 flow [2023-08-31 03:51:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-08-31 03:51:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2023-08-31 03:51:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 11307 transitions. [2023-08-31 03:51:56,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37953141783029 [2023-08-31 03:51:56,537 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 11307 transitions. [2023-08-31 03:51:56,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 11307 transitions. [2023-08-31 03:51:56,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:56,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 11307 transitions. [2023-08-31 03:51:56,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 85.01503759398496) internal successors, (11307), 133 states have internal predecessors, (11307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:56,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 224.0) internal successors, (30016), 134 states have internal predecessors, (30016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:56,564 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 224.0) internal successors, (30016), 134 states have internal predecessors, (30016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:56,564 INFO L175 Difference]: Start difference. First operand has 315 places, 562 transitions, 12634 flow. Second operand 133 states and 11307 transitions. [2023-08-31 03:51:56,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1978 transitions, 41361 flow [2023-08-31 03:51:59,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1978 transitions, 29207 flow, removed 6041 selfloop flow, removed 14 redundant places. [2023-08-31 03:51:59,536 INFO L231 Difference]: Finished difference. Result has 502 places, 1076 transitions, 19175 flow [2023-08-31 03:51:59,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=9347, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=19175, PETRI_PLACES=502, PETRI_TRANSITIONS=1076} [2023-08-31 03:51:59,537 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 483 predicate places. [2023-08-31 03:51:59,537 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1076 transitions, 19175 flow [2023-08-31 03:51:59,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 78.46666666666667) internal successors, (3531), 45 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:59,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:59,538 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:59,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:59,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:59,742 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:59,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1928211943, now seen corresponding path program 18 times [2023-08-31 03:51:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111340786] [2023-08-31 03:51:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111340786] [2023-08-31 03:52:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111340786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48365224] [2023-08-31 03:52:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:52:00,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:00,350 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:52:00,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:52:00,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 03:52:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:52:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-31 03:52:00,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 03:52:00,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:00,712 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:52:00,712 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 25 treesize of output 13 [2023-08-31 03:52:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 03:52:00,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48365224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:00,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:00,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 23 [2023-08-31 03:52:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139235347] [2023-08-31 03:52:00,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:00,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:52:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:52:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:52:01,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-08-31 03:52:01,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1076 transitions, 19175 flow. Second operand has 25 states, 25 states have (on average 85.72) internal successors, (2143), 25 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:01,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:01,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-08-31 03:52:01,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:12,193 INFO L130 PetriNetUnfolder]: 15246/28134 cut-off events. [2023-08-31 03:52:12,193 INFO L131 PetriNetUnfolder]: For 438331/438331 co-relation queries the response was YES. [2023-08-31 03:52:12,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144495 conditions, 28134 events. 15246/28134 cut-off events. For 438331/438331 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 241357 event pairs, 2764 based on Foata normal form. 1/28135 useless extension candidates. Maximal degree in co-relation 143353. Up to 11966 conditions per place. [2023-08-31 03:52:12,580 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 768 selfloop transitions, 895 changer transitions 256/1919 dead transitions. [2023-08-31 03:52:12,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1919 transitions, 30214 flow [2023-08-31 03:52:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-31 03:52:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-31 03:52:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 7265 transitions. [2023-08-31 03:52:12,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105447558770344 [2023-08-31 03:52:12,585 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 7265 transitions. [2023-08-31 03:52:12,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 7265 transitions. [2023-08-31 03:52:12,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:12,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 7265 transitions. [2023-08-31 03:52:12,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 91.9620253164557) internal successors, (7265), 79 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:12,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 224.0) internal successors, (17920), 80 states have internal predecessors, (17920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:12,600 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 224.0) internal successors, (17920), 80 states have internal predecessors, (17920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:12,600 INFO L175 Difference]: Start difference. First operand has 502 places, 1076 transitions, 19175 flow. Second operand 79 states and 7265 transitions. [2023-08-31 03:52:12,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1919 transitions, 30214 flow [2023-08-31 03:52:15,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1919 transitions, 29653 flow, removed 271 selfloop flow, removed 8 redundant places. [2023-08-31 03:52:15,762 INFO L231 Difference]: Finished difference. Result has 573 places, 1310 transitions, 24704 flow [2023-08-31 03:52:15,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=18680, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=24704, PETRI_PLACES=573, PETRI_TRANSITIONS=1310} [2023-08-31 03:52:15,763 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 554 predicate places. [2023-08-31 03:52:15,763 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1310 transitions, 24704 flow [2023-08-31 03:52:15,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.72) internal successors, (2143), 25 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:15,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:15,764 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:15,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 03:52:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:15,964 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:52:15,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash 430963349, now seen corresponding path program 19 times [2023-08-31 03:52:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:15,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031777826] [2023-08-31 03:52:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:15,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:52:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031777826] [2023-08-31 03:52:16,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031777826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400407697] [2023-08-31 03:52:16,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:52:16,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:16,067 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:52:16,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:52:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:52:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:52:16,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:52:16,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400407697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:16,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:16,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10] total 17 [2023-08-31 03:52:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928373551] [2023-08-31 03:52:16,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:16,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:52:16,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:52:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:52:16,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-31 03:52:16,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1310 transitions, 24704 flow. Second operand has 18 states, 18 states have (on average 98.83333333333333) internal successors, (1779), 18 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:16,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:16,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-31 03:52:16,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:29,911 INFO L130 PetriNetUnfolder]: 21200/39003 cut-off events. [2023-08-31 03:52:29,911 INFO L131 PetriNetUnfolder]: For 654996/654996 co-relation queries the response was YES. [2023-08-31 03:52:30,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210262 conditions, 39003 events. 21200/39003 cut-off events. For 654996/654996 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 351499 event pairs, 5117 based on Foata normal form. 72/39075 useless extension candidates. Maximal degree in co-relation 209520. Up to 20524 conditions per place. [2023-08-31 03:52:30,500 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 923 selfloop transitions, 820 changer transitions 57/1800 dead transitions. [2023-08-31 03:52:30,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1800 transitions, 38655 flow [2023-08-31 03:52:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 03:52:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 03:52:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 742 transitions. [2023-08-31 03:52:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2023-08-31 03:52:30,501 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 742 transitions. [2023-08-31 03:52:30,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 742 transitions. [2023-08-31 03:52:30,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:30,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 742 transitions. [2023-08-31 03:52:30,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:30,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:30,503 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:30,503 INFO L175 Difference]: Start difference. First operand has 573 places, 1310 transitions, 24704 flow. Second operand 7 states and 742 transitions. [2023-08-31 03:52:30,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1800 transitions, 38655 flow [2023-08-31 03:52:35,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1800 transitions, 37882 flow, removed 316 selfloop flow, removed 14 redundant places. [2023-08-31 03:52:35,269 INFO L231 Difference]: Finished difference. Result has 570 places, 1700 transitions, 36218 flow [2023-08-31 03:52:35,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24077, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36218, PETRI_PLACES=570, PETRI_TRANSITIONS=1700} [2023-08-31 03:52:35,270 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 551 predicate places. [2023-08-31 03:52:35,270 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1700 transitions, 36218 flow [2023-08-31 03:52:35,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.83333333333333) internal successors, (1779), 18 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:35,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:35,270 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:35,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:52:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:35,471 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:52:35,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 830326645, now seen corresponding path program 20 times [2023-08-31 03:52:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:35,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646709181] [2023-08-31 03:52:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:36,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646709181] [2023-08-31 03:52:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646709181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364606074] [2023-08-31 03:52:36,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:52:36,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:36,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:36,147 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:52:36,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:52:36,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:52:36,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:52:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 03:52:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:36,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:36,856 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:52:36,856 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 25 treesize of output 13 [2023-08-31 03:52:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364606074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:37,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-31 03:52:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508532511] [2023-08-31 03:52:37,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:37,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-31 03:52:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-31 03:52:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2023-08-31 03:52:38,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-08-31 03:52:38,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1700 transitions, 36218 flow. Second operand has 51 states, 51 states have (on average 83.31372549019608) internal successors, (4249), 51 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:38,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:38,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-08-31 03:52:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:53:21,222 INFO L130 PetriNetUnfolder]: 36530/68002 cut-off events. [2023-08-31 03:53:21,222 INFO L131 PetriNetUnfolder]: For 1552825/1552825 co-relation queries the response was YES. [2023-08-31 03:53:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396302 conditions, 68002 events. 36530/68002 cut-off events. For 1552825/1552825 co-relation queries the response was YES. Maximal size of possible extension queue 2476. Compared 676569 event pairs, 4160 based on Foata normal form. 1414/69416 useless extension candidates. Maximal degree in co-relation 396133. Up to 28946 conditions per place. [2023-08-31 03:53:22,822 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1734 selfloop transitions, 2447 changer transitions 612/4793 dead transitions. [2023-08-31 03:53:22,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 4793 transitions, 95790 flow [2023-08-31 03:53:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2023-08-31 03:53:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2023-08-31 03:53:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 21643 transitions. [2023-08-31 03:53:22,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40427002390914524 [2023-08-31 03:53:22,835 INFO L72 ComplementDD]: Start complementDD. Operand 239 states and 21643 transitions. [2023-08-31 03:53:22,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 239 states and 21643 transitions. [2023-08-31 03:53:22,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:53:22,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 239 states and 21643 transitions. [2023-08-31 03:53:22,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 240 states, 239 states have (on average 90.55648535564853) internal successors, (21643), 239 states have internal predecessors, (21643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:22,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 240 states, 240 states have (on average 224.0) internal successors, (53760), 240 states have internal predecessors, (53760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:22,893 INFO L81 ComplementDD]: Finished complementDD. Result has 240 states, 240 states have (on average 224.0) internal successors, (53760), 240 states have internal predecessors, (53760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:22,894 INFO L175 Difference]: Start difference. First operand has 570 places, 1700 transitions, 36218 flow. Second operand 239 states and 21643 transitions. [2023-08-31 03:53:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 4793 transitions, 95790 flow [2023-08-31 03:53:36,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 4793 transitions, 90199 flow, removed 2091 selfloop flow, removed 69 redundant places. [2023-08-31 03:53:36,850 INFO L231 Difference]: Finished difference. Result has 750 places, 2945 transitions, 69092 flow [2023-08-31 03:53:36,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26947, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=239, PETRI_FLOW=69092, PETRI_PLACES=750, PETRI_TRANSITIONS=2945} [2023-08-31 03:53:36,852 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 731 predicate places. [2023-08-31 03:53:36,852 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 2945 transitions, 69092 flow [2023-08-31 03:53:36,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 83.31372549019608) internal successors, (4249), 51 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:36,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:53:36,853 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:53:36,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:53:37,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 03:53:37,057 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:53:37,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:53:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1808898315, now seen corresponding path program 21 times [2023-08-31 03:53:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:53:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907908057] [2023-08-31 03:53:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:53:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:53:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:53:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:53:37,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:53:37,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907908057] [2023-08-31 03:53:37,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907908057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:53:37,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043683268] [2023-08-31 03:53:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:53:37,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:53:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:53:37,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:53:37,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:53:38,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 03:53:38,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:53:38,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 03:53:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:53:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-31 03:53:38,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:53:38,548 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:53:38,548 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 25 treesize of output 13 [2023-08-31 03:53:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-31 03:53:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043683268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:53:38,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:53:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2023-08-31 03:53:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313737937] [2023-08-31 03:53:38,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:53:38,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:53:38,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:53:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:53:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:53:39,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-08-31 03:53:39,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 2945 transitions, 69092 flow. Second operand has 27 states, 27 states have (on average 85.62962962962963) internal successors, (2312), 27 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:39,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:53:39,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-08-31 03:53:39,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:54:34,635 INFO L130 PetriNetUnfolder]: 41738/77411 cut-off events. [2023-08-31 03:54:34,635 INFO L131 PetriNetUnfolder]: For 4346981/4346981 co-relation queries the response was YES. [2023-08-31 03:54:36,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479560 conditions, 77411 events. 41738/77411 cut-off events. For 4346981/4346981 co-relation queries the response was YES. Maximal size of possible extension queue 2607. Compared 776268 event pairs, 4809 based on Foata normal form. 292/77703 useless extension candidates. Maximal degree in co-relation 479347. Up to 32934 conditions per place. [2023-08-31 03:54:37,020 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1128 selfloop transitions, 2771 changer transitions 489/4388 dead transitions. [2023-08-31 03:54:37,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 848 places, 4388 transitions, 104375 flow [2023-08-31 03:54:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-08-31 03:54:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-08-31 03:54:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 10818 transitions. [2023-08-31 03:54:37,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41277472527472525 [2023-08-31 03:54:37,026 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 10818 transitions. [2023-08-31 03:54:37,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 10818 transitions. [2023-08-31 03:54:37,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:54:37,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 10818 transitions. [2023-08-31 03:54:37,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 92.46153846153847) internal successors, (10818), 117 states have internal predecessors, (10818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:37,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 224.0) internal successors, (26432), 118 states have internal predecessors, (26432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:37,048 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 224.0) internal successors, (26432), 118 states have internal predecessors, (26432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:54:37,048 INFO L175 Difference]: Start difference. First operand has 750 places, 2945 transitions, 69092 flow. Second operand 117 states and 10818 transitions. [2023-08-31 03:54:37,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 848 places, 4388 transitions, 104375 flow [2023-08-31 03:55:12,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 4388 transitions, 95013 flow, removed 4567 selfloop flow, removed 42 redundant places. [2023-08-31 03:55:12,982 INFO L231 Difference]: Finished difference. Result has 847 places, 3278 transitions, 78104 flow [2023-08-31 03:55:12,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=61270, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=78104, PETRI_PLACES=847, PETRI_TRANSITIONS=3278} [2023-08-31 03:55:12,985 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 828 predicate places. [2023-08-31 03:55:12,985 INFO L495 AbstractCegarLoop]: Abstraction has has 847 places, 3278 transitions, 78104 flow [2023-08-31 03:55:12,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.62962962962963) internal successors, (2312), 27 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:55:12,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:55:12,986 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:55:12,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 03:55:13,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 03:55:13,191 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:55:13,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:55:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1294257489, now seen corresponding path program 22 times [2023-08-31 03:55:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:55:13,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744943491] [2023-08-31 03:55:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:55:13,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:55:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:55:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:55:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:55:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744943491] [2023-08-31 03:55:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744943491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:55:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822342552] [2023-08-31 03:55:13,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:55:13,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:55:13,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:55:13,648 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:55:13,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:55:13,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:55:13,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:55:13,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 03:55:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:55:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:55:14,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:55:14,310 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:55:14,310 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 25 treesize of output 13 [2023-08-31 03:55:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:55:14,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822342552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:55:14,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:55:14,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-31 03:55:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034113102] [2023-08-31 03:55:14,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:55:14,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-31 03:55:14,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:55:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-31 03:55:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-08-31 03:55:15,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-08-31 03:55:15,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 847 places, 3278 transitions, 78104 flow. Second operand has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:55:15,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:55:15,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-08-31 03:55:15,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:56:26,714 INFO L130 PetriNetUnfolder]: 41321/76598 cut-off events. [2023-08-31 03:56:26,714 INFO L131 PetriNetUnfolder]: For 3806341/3806341 co-relation queries the response was YES. [2023-08-31 03:56:29,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481433 conditions, 76598 events. 41321/76598 cut-off events. For 3806341/3806341 co-relation queries the response was YES. Maximal size of possible extension queue 2660. Compared 767961 event pairs, 4810 based on Foata normal form. 34/76632 useless extension candidates. Maximal degree in co-relation 481190. Up to 32568 conditions per place. [2023-08-31 03:56:29,424 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 793 selfloop transitions, 3284 changer transitions 392/4469 dead transitions. [2023-08-31 03:56:29,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 979 places, 4469 transitions, 101663 flow [2023-08-31 03:56:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-08-31 03:56:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2023-08-31 03:56:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 12490 transitions. [2023-08-31 03:56:29,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011433710174717 [2023-08-31 03:56:29,431 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 12490 transitions. [2023-08-31 03:56:29,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 12490 transitions. [2023-08-31 03:56:29,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:56:29,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 12490 transitions. [2023-08-31 03:56:29,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 89.85611510791367) internal successors, (12490), 139 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:56:29,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 224.0) internal successors, (31360), 140 states have internal predecessors, (31360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:56:29,455 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 224.0) internal successors, (31360), 140 states have internal predecessors, (31360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:56:29,455 INFO L175 Difference]: Start difference. First operand has 847 places, 3278 transitions, 78104 flow. Second operand 139 states and 12490 transitions. [2023-08-31 03:56:29,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 979 places, 4469 transitions, 101663 flow [2023-08-31 03:57:16,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 4469 transitions, 94977 flow, removed 1176 selfloop flow, removed 29 redundant places. [2023-08-31 03:57:16,365 INFO L231 Difference]: Finished difference. Result has 958 places, 3453 transitions, 83757 flow [2023-08-31 03:57:16,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=71596, PETRI_DIFFERENCE_MINUEND_PLACES=812, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=83757, PETRI_PLACES=958, PETRI_TRANSITIONS=3453} [2023-08-31 03:57:16,368 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 939 predicate places. [2023-08-31 03:57:16,368 INFO L495 AbstractCegarLoop]: Abstraction has has 958 places, 3453 transitions, 83757 flow [2023-08-31 03:57:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:57:16,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:57:16,369 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:57:16,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:57:16,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:57:16,575 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:57:16,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:57:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 136213909, now seen corresponding path program 23 times [2023-08-31 03:57:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:57:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122808983] [2023-08-31 03:57:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:57:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:57:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:57:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:57:17,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:57:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122808983] [2023-08-31 03:57:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122808983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:57:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178396790] [2023-08-31 03:57:17,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:57:17,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:57:17,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:57:17,135 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:57:17,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:57:17,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 03:57:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:57:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:57:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:57:17,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:57:17,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:57:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:57:17,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:57:17,905 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:57:17,905 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 23 treesize of output 10 [2023-08-31 03:57:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:57:17,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:57:18,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:57:18,502 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 58 treesize of output 46 [2023-08-31 03:57:18,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:57:18,511 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 104 treesize of output 97 [2023-08-31 03:57:18,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-08-31 03:57:18,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:57:18,525 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 52 treesize of output 49 [2023-08-31 03:57:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:57:18,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178396790] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:57:18,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:57:18,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-31 03:57:18,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27255539] [2023-08-31 03:57:18,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:57:18,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-31 03:57:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:57:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-31 03:57:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2540, Unknown=2, NotChecked=0, Total=2862 [2023-08-31 03:57:19,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-08-31 03:57:19,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 3453 transitions, 83757 flow. Second operand has 54 states, 54 states have (on average 65.38888888888889) internal successors, (3531), 54 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:57:19,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:57:19,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-08-31 03:57:19,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:57:22,215 WARN L839 $PredicateComparison]: unable to prove that (and (or (< (+ 5 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0) (let ((.cse0 (< c_~n~0 (+ c_~back~0 5)))) (and (or (< c_~front~0 (+ c_~back~0 1)) .cse0) (or .cse0 (< c_~n~0 (+ 6 c_~front~0))) (or .cse0 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))))) (or (forall ((v_~back~0_195 Int)) (or (<= c_~n~0 v_~back~0_195) (< v_~back~0_195 0) (< v_~back~0_195 (+ c_~back~0 2)) (not (= 5 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* v_~back~0_195 4))))))) (forall ((v_ArrVal_969 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_969) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))))) is different from false [2023-08-31 03:57:24,027 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~queue~0.base)) (.cse1 (forall ((v_ArrVal_969 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_969) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))))) (and (or (<= c_~n~0 c_~back~0) (not (= 5 (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))))) .cse1 (< c_~back~0 0)) (or (forall ((v_~back~0_195 Int)) (or (<= c_~n~0 v_~back~0_195) (< v_~back~0_195 0) (not (= 5 (select .cse0 (+ c_~queue~0.offset (* v_~back~0_195 4))))) (< v_~back~0_195 (+ c_~back~0 1)))) .cse1))) is different from false [2023-08-31 03:59:08,740 INFO L130 PetriNetUnfolder]: 64270/118713 cut-off events. [2023-08-31 03:59:08,740 INFO L131 PetriNetUnfolder]: For 5725607/5725607 co-relation queries the response was YES. [2023-08-31 03:59:12,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755689 conditions, 118713 events. 64270/118713 cut-off events. For 5725607/5725607 co-relation queries the response was YES. Maximal size of possible extension queue 3974. Compared 1250589 event pairs, 24299 based on Foata normal form. 1/118714 useless extension candidates. Maximal degree in co-relation 755442. Up to 55979 conditions per place. [2023-08-31 03:59:13,264 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 4807 selfloop transitions, 768 changer transitions 167/5742 dead transitions. [2023-08-31 03:59:13,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1018 places, 5742 transitions, 142049 flow [2023-08-31 03:59:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-31 03:59:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-31 03:59:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4344 transitions. [2023-08-31 03:59:13,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31791569086651056 [2023-08-31 03:59:13,268 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4344 transitions. [2023-08-31 03:59:13,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4344 transitions. [2023-08-31 03:59:13,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:59:13,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4344 transitions. [2023-08-31 03:59:13,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 71.21311475409836) internal successors, (4344), 61 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:59:13,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 224.0) internal successors, (13888), 62 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:59:13,278 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 224.0) internal successors, (13888), 62 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:59:13,278 INFO L175 Difference]: Start difference. First operand has 958 places, 3453 transitions, 83757 flow. Second operand 61 states and 4344 transitions. [2023-08-31 03:59:13,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1018 places, 5742 transitions, 142049 flow [2023-08-31 04:01:00,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 957 places, 5742 transitions, 137873 flow, removed 1262 selfloop flow, removed 61 redundant places. [2023-08-31 04:01:00,628 INFO L231 Difference]: Finished difference. Result has 980 places, 3719 transitions, 89986 flow [2023-08-31 04:01:00,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=81257, PETRI_DIFFERENCE_MINUEND_PLACES=897, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=89986, PETRI_PLACES=980, PETRI_TRANSITIONS=3719} [2023-08-31 04:01:00,631 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 961 predicate places. [2023-08-31 04:01:00,631 INFO L495 AbstractCegarLoop]: Abstraction has has 980 places, 3719 transitions, 89986 flow [2023-08-31 04:01:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 65.38888888888889) internal successors, (3531), 54 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:00,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:01:00,631 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:01:00,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 04:01:00,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:01:00,832 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:01:00,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:01:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash 436178500, now seen corresponding path program 24 times [2023-08-31 04:01:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:01:00,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890111310] [2023-08-31 04:01:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:01:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:01:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:01:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:01:01,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:01:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890111310] [2023-08-31 04:01:01,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890111310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:01:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142112952] [2023-08-31 04:01:01,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:01:01,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:01:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:01:01,725 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:01:01,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 04:01:02,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:01:02,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:01:02,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:01:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:01:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:01:02,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 04:01:03,117 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:01:03,120 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 23 treesize of output 10 [2023-08-31 04:01:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:01:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:01:06,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:01:06,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-31 04:01:06,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-31 04:01:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:01:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142112952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:01:06,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:01:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 43 [2023-08-31 04:01:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468664776] [2023-08-31 04:01:06,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:01:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-31 04:01:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:01:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-31 04:01:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1656, Unknown=2, NotChecked=0, Total=1980 [2023-08-31 04:01:10,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:12,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:17,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:20,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:20,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-08-31 04:01:20,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 3719 transitions, 89986 flow. Second operand has 45 states, 45 states have (on average 72.5111111111111) internal successors, (3263), 45 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:20,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:01:20,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-08-31 04:01:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:01:35,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:01:45,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:47,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:01:49,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:01:56,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:58,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:00,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:02,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:04,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:11,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:18,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:19,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:20,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:22,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:24,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:26,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:28,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:30,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:32,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:34,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:02:49,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:51,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:08,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:10,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:12,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:14,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:23,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:25,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 04:03:28,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:30,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:32,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:34,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:44,173 WARN L539 Checker$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