./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.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-more-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --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 02:43:38,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:43:38,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:43:38,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:43:38,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:43:38,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:43:38,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:43:38,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:43:38,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:43:38,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:43:38,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:43:38,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:43:38,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:43:38,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:43:38,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:43:38,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:43:38,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:43:38,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:43:38,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:43:38,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:43:38,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:43:38,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:43:38,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:43:38,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:43:38,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:43:38,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:43:38,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:43:38,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:43:38,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:43:38,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:43:38,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:43:38,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:43:38,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:43:38,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:43:38,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:43:38,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:43:38,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:43:38,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:43:38,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:43:38,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:43:38,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:43:38,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:43:38,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:43:38,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:43:38,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:43:38,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:43:38,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:43:38,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:43:38,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:43:38,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:43:38,288 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:43:38,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:43:38,289 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:43:38,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:43:38,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:43:38,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:43:38,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:43:38,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:43:38,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:43:38,291 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:43:38,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:43:38,291 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:43:38,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:43:38,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:43:38,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:43:38,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:43:38,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:43:38,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:43:38,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:43:38,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:43:38,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:43:38,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:43:38,293 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:43:38,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:43:38,294 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:43:38,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:43:38,294 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:43:38,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:43:38,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:43:38,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:43:38,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:43:38,631 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:43:38,631 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:43:38,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2023-08-31 02:43:39,759 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:43:39,979 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:43:39,979 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2023-08-31 02:43:39,985 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d605eae79/29a08a6473854fcd9f65b206e81ca250/FLAGfd92735b5 [2023-08-31 02:43:39,998 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d605eae79/29a08a6473854fcd9f65b206e81ca250 [2023-08-31 02:43:40,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:43:40,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:43:40,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:43:40,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:43:40,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:43:40,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:43:39" (1/1) ... [2023-08-31 02:43:40,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df14158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40, skipping insertion in model container [2023-08-31 02:43:40,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:43:39" (1/1) ... [2023-08-31 02:43:40,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:43:40,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:43:40,171 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-08-31 02:43:40,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:43:40,188 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:43:40,208 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-08-31 02:43:40,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:43:40,220 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:43:40,220 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:43:40,226 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:43:40,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40 WrapperNode [2023-08-31 02:43:40,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:43:40,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:43:40,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:43:40,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:43:40,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,276 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 203 [2023-08-31 02:43:40,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:43:40,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:43:40,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:43:40,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:43:40,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:43:40,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:43:40,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:43:40,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:43:40,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (1/1) ... [2023-08-31 02:43:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:43:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:40,390 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 02:43:40,414 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 02:43:40,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:43:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:43:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:43:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:43:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:43:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:43:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:43:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:43:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:43:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:43:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:43:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:43:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:43:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:43:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:43:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:43:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:43:40,446 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 02:43:40,548 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:43:40,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:43:40,882 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:43:41,087 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:43:41,088 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 02:43:41,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:43:41 BoogieIcfgContainer [2023-08-31 02:43:41,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:43:41,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:43:41,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:43:41,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:43:41,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:43:39" (1/3) ... [2023-08-31 02:43:41,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd30bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:43:41, skipping insertion in model container [2023-08-31 02:43:41,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:43:40" (2/3) ... [2023-08-31 02:43:41,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd30bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:43:41, skipping insertion in model container [2023-08-31 02:43:41,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:43:41" (3/3) ... [2023-08-31 02:43:41,099 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2023-08-31 02:43:41,106 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:43:41,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:43:41,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:43:41,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:43:41,208 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 02:43:41,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 147 transitions, 318 flow [2023-08-31 02:43:41,349 INFO L130 PetriNetUnfolder]: 12/144 cut-off events. [2023-08-31 02:43:41,350 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:43:41,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 12/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-31 02:43:41,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 147 transitions, 318 flow [2023-08-31 02:43:41,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 134 transitions, 286 flow [2023-08-31 02:43:41,368 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:43:41,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 134 transitions, 286 flow [2023-08-31 02:43:41,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 134 transitions, 286 flow [2023-08-31 02:43:41,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 134 transitions, 286 flow [2023-08-31 02:43:41,426 INFO L130 PetriNetUnfolder]: 12/134 cut-off events. [2023-08-31 02:43:41,428 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:43:41,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 134 events. 12/134 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 98 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-31 02:43:41,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-31 02:43:46,204 INFO L134 LiptonReduction]: Checked pairs total: 2063 [2023-08-31 02:43:46,205 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-31 02:43:46,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:43:46,222 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;@4741d2ee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:43:46,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 02:43:46,229 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2023-08-31 02:43:46,229 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:43:46,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:46,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:46,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:46,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1370048822, now seen corresponding path program 1 times [2023-08-31 02:43:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141650525] [2023-08-31 02:43:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:46,686 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 02:43:46,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:46,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141650525] [2023-08-31 02:43:46,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141650525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:43:46,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:43:46,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:43:46,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202487426] [2023-08-31 02:43:46,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:46,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:43:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:43:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:43:46,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 274 [2023-08-31 02:43:46,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 02:43:46,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:46,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 274 [2023-08-31 02:43:46,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:46,921 INFO L130 PetriNetUnfolder]: 619/869 cut-off events. [2023-08-31 02:43:46,921 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-31 02:43:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3396 event pairs, 95 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2023-08-31 02:43:46,932 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-08-31 02:43:46,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-08-31 02:43:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:43:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:43:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-31 02:43:46,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036496350364964 [2023-08-31 02:43:46,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-31 02:43:46,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-31 02:43:46,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:46,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-31 02:43:46,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 02:43:46,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 02:43:46,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 02:43:46,975 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 414 transitions. [2023-08-31 02:43:46,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-08-31 02:43:46,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 02:43:46,982 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 84 flow [2023-08-31 02:43:46,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-08-31 02:43:46,988 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-31 02:43:46,990 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 84 flow [2023-08-31 02:43:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 02:43:46,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:46,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:46,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:43:46,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:47,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:47,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1687574261, now seen corresponding path program 1 times [2023-08-31 02:43:47,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:47,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311085853] [2023-08-31 02:43:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:47,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311085853] [2023-08-31 02:43:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311085853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:43:47,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:43:47,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:43:47,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600448841] [2023-08-31 02:43:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:43:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:43:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:43:47,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 274 [2023-08-31 02:43:47,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 02:43:47,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:47,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 274 [2023-08-31 02:43:47,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:47,549 INFO L130 PetriNetUnfolder]: 1149/1685 cut-off events. [2023-08-31 02:43:47,550 INFO L131 PetriNetUnfolder]: For 279/279 co-relation queries the response was YES. [2023-08-31 02:43:47,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 1685 events. 1149/1685 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7707 event pairs, 604 based on Foata normal form. 62/1379 useless extension candidates. Maximal degree in co-relation 1014. Up to 872 conditions per place. [2023-08-31 02:43:47,559 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 60 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-31 02:43:47,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 66 transitions, 316 flow [2023-08-31 02:43:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:43:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:43:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-31 02:43:47,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802919708029197 [2023-08-31 02:43:47,564 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-31 02:43:47,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-31 02:43:47,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:47,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-31 02:43:47,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 02:43:47,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 02:43:47,571 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 02:43:47,571 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 84 flow. Second operand 5 states and 658 transitions. [2023-08-31 02:43:47,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 66 transitions, 316 flow [2023-08-31 02:43:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:43:47,575 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 110 flow [2023-08-31 02:43:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-31 02:43:47,576 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-31 02:43:47,577 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 110 flow [2023-08-31 02:43:47,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 02:43:47,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:47,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:47,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:43:47,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:47,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1620014424, now seen corresponding path program 1 times [2023-08-31 02:43:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252030182] [2023-08-31 02:43:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:47,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252030182] [2023-08-31 02:43:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252030182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119943570] [2023-08-31 02:43:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:47,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:47,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:47,761 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 02:43:47,809 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 02:43:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:43:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:48,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:48,158 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 02:43:48,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119943570] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:48,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:43:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-31 02:43:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098415870] [2023-08-31 02:43:48,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:43:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:43:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:43:48,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-31 02:43:48,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:48,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:48,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-31 02:43:48,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:48,742 INFO L130 PetriNetUnfolder]: 1377/2035 cut-off events. [2023-08-31 02:43:48,743 INFO L131 PetriNetUnfolder]: For 771/847 co-relation queries the response was YES. [2023-08-31 02:43:48,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 2035 events. 1377/2035 cut-off events. For 771/847 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9548 event pairs, 437 based on Foata normal form. 76/1813 useless extension candidates. Maximal degree in co-relation 3286. Up to 520 conditions per place. [2023-08-31 02:43:48,753 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 105 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2023-08-31 02:43:48,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 653 flow [2023-08-31 02:43:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:43:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:43:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1225 transitions. [2023-08-31 02:43:48,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470802919708029 [2023-08-31 02:43:48,758 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1225 transitions. [2023-08-31 02:43:48,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1225 transitions. [2023-08-31 02:43:48,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:48,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1225 transitions. [2023-08-31 02:43:48,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.5) internal successors, (1225), 10 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 02:43:48,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states 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 02:43:48,768 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states 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 02:43:48,768 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 110 flow. Second operand 10 states and 1225 transitions. [2023-08-31 02:43:48,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 653 flow [2023-08-31 02:43:48,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 649 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:43:48,771 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 269 flow [2023-08-31 02:43:48,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-08-31 02:43:48,772 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-08-31 02:43:48,773 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 269 flow [2023-08-31 02:43:48,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:48,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:48,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:48,782 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 02:43:48,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:48,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:48,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1693539329, now seen corresponding path program 1 times [2023-08-31 02:43:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091785952] [2023-08-31 02:43:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:49,127 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 02:43:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091785952] [2023-08-31 02:43:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091785952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:43:49,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:43:49,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:43:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269537759] [2023-08-31 02:43:49,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:49,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:43:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:43:49,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:43:49,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 274 [2023-08-31 02:43:49,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 02:43:49,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:49,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 274 [2023-08-31 02:43:49,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:49,455 INFO L130 PetriNetUnfolder]: 1115/1653 cut-off events. [2023-08-31 02:43:49,455 INFO L131 PetriNetUnfolder]: For 2227/2285 co-relation queries the response was YES. [2023-08-31 02:43:49,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5250 conditions, 1653 events. 1115/1653 cut-off events. For 2227/2285 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7554 event pairs, 556 based on Foata normal form. 98/1731 useless extension candidates. Maximal degree in co-relation 4186. Up to 1284 conditions per place. [2023-08-31 02:43:49,468 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 67 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-31 02:43:49,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 481 flow [2023-08-31 02:43:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:43:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:43:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-08-31 02:43:49,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737226277372263 [2023-08-31 02:43:49,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-08-31 02:43:49,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-08-31 02:43:49,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:49,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-08-31 02:43:49,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 02:43:49,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 02:43:49,477 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 02:43:49,477 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 269 flow. Second operand 5 states and 649 transitions. [2023-08-31 02:43:49,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 481 flow [2023-08-31 02:43:49,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 480 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:43:49,486 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 271 flow [2023-08-31 02:43:49,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-31 02:43:49,487 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-31 02:43:49,487 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 271 flow [2023-08-31 02:43:49,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 02:43:49,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:49,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:43:49,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:49,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash -590735817, now seen corresponding path program 1 times [2023-08-31 02:43:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:49,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285121040] [2023-08-31 02:43:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:49,608 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 02:43:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285121040] [2023-08-31 02:43:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285121040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:43:49,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:43:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:43:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819368162] [2023-08-31 02:43:49,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:49,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:43:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:43:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:43:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 274 [2023-08-31 02:43:49,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 02:43:49,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:49,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 274 [2023-08-31 02:43:49,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:49,867 INFO L130 PetriNetUnfolder]: 937/1384 cut-off events. [2023-08-31 02:43:49,868 INFO L131 PetriNetUnfolder]: For 1939/2017 co-relation queries the response was YES. [2023-08-31 02:43:49,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 1384 events. 937/1384 cut-off events. For 1939/2017 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6114 event pairs, 376 based on Foata normal form. 92/1470 useless extension candidates. Maximal degree in co-relation 4143. Up to 975 conditions per place. [2023-08-31 02:43:49,879 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 52 selfloop transitions, 3 changer transitions 25/83 dead transitions. [2023-08-31 02:43:49,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 541 flow [2023-08-31 02:43:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:43:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:43:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 767 transitions. [2023-08-31 02:43:49,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46654501216545013 [2023-08-31 02:43:49,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 767 transitions. [2023-08-31 02:43:49,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 767 transitions. [2023-08-31 02:43:49,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:49,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 767 transitions. [2023-08-31 02:43:49,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.83333333333333) internal successors, (767), 6 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 02:43:49,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 02:43:49,887 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 02:43:49,888 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 271 flow. Second operand 6 states and 767 transitions. [2023-08-31 02:43:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 541 flow [2023-08-31 02:43:49,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 511 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-31 02:43:49,897 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 219 flow [2023-08-31 02:43:49,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-31 02:43:49,897 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-31 02:43:49,898 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 219 flow [2023-08-31 02:43:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 02:43:49,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:49,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:49,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:43:49,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:49,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash 705664608, now seen corresponding path program 2 times [2023-08-31 02:43:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763309428] [2023-08-31 02:43:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:50,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763309428] [2023-08-31 02:43:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763309428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018365766] [2023-08-31 02:43:50,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:43:50,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:50,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:50,033 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 02:43:50,056 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 02:43:50,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:43:50,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:43:50,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:43:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:50,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:50,293 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 02:43:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018365766] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:50,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:43:50,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-31 02:43:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991649534] [2023-08-31 02:43:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:43:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:43:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:43:50,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-31 02:43:50,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:50,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:50,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-31 02:43:50,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:50,758 INFO L130 PetriNetUnfolder]: 1525/2203 cut-off events. [2023-08-31 02:43:50,758 INFO L131 PetriNetUnfolder]: For 2637/2637 co-relation queries the response was YES. [2023-08-31 02:43:50,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 2203 events. 1525/2203 cut-off events. For 2637/2637 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10103 event pairs, 265 based on Foata normal form. 16/2216 useless extension candidates. Maximal degree in co-relation 7067. Up to 772 conditions per place. [2023-08-31 02:43:50,774 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 74 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2023-08-31 02:43:50,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 108 transitions, 719 flow [2023-08-31 02:43:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:43:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:43:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-08-31 02:43:50,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4402372262773723 [2023-08-31 02:43:50,778 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-08-31 02:43:50,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-08-31 02:43:50,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:50,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-08-31 02:43:50,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states 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 02:43:50,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 02:43:50,784 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 02:43:50,785 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 219 flow. Second operand 8 states and 965 transitions. [2023-08-31 02:43:50,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 108 transitions, 719 flow [2023-08-31 02:43:50,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 108 transitions, 687 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-31 02:43:50,816 INFO L231 Difference]: Finished difference. Result has 53 places, 64 transitions, 469 flow [2023-08-31 02:43:50,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=469, PETRI_PLACES=53, PETRI_TRANSITIONS=64} [2023-08-31 02:43:50,818 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-31 02:43:50,819 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 64 transitions, 469 flow [2023-08-31 02:43:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:50,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:50,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:50,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 02:43:51,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 02:43:51,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:51,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash -186636764, now seen corresponding path program 3 times [2023-08-31 02:43:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:51,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564150824] [2023-08-31 02:43:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:51,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:51,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:51,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564150824] [2023-08-31 02:43:51,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564150824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:51,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996607651] [2023-08-31 02:43:51,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:43:51,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:51,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:51,145 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 02:43:51,151 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 02:43:51,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:43:51,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:43:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:43:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:51,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:51,409 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 02:43:51,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996607651] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:51,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:43:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-08-31 02:43:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143737370] [2023-08-31 02:43:51,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:51,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:43:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:43:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:43:51,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-31 02:43:51,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 469 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:51,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:51,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-31 02:43:51,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:52,011 INFO L130 PetriNetUnfolder]: 1631/2359 cut-off events. [2023-08-31 02:43:52,011 INFO L131 PetriNetUnfolder]: For 4764/4764 co-relation queries the response was YES. [2023-08-31 02:43:52,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 2359 events. 1631/2359 cut-off events. For 4764/4764 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10944 event pairs, 201 based on Foata normal form. 12/2370 useless extension candidates. Maximal degree in co-relation 9304. Up to 720 conditions per place. [2023-08-31 02:43:52,031 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 100 selfloop transitions, 39 changer transitions 0/140 dead transitions. [2023-08-31 02:43:52,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 140 transitions, 1134 flow [2023-08-31 02:43:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 02:43:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 02:43:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1094 transitions. [2023-08-31 02:43:52,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44363341443633414 [2023-08-31 02:43:52,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1094 transitions. [2023-08-31 02:43:52,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1094 transitions. [2023-08-31 02:43:52,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:52,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1094 transitions. [2023-08-31 02:43:52,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.55555555555556) internal successors, (1094), 9 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states 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 02:43:52,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 02:43:52,042 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 02:43:52,043 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 469 flow. Second operand 9 states and 1094 transitions. [2023-08-31 02:43:52,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 140 transitions, 1134 flow [2023-08-31 02:43:52,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 140 transitions, 1123 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 02:43:52,067 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 777 flow [2023-08-31 02:43:52,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2023-08-31 02:43:52,068 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-08-31 02:43:52,068 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 777 flow [2023-08-31 02:43:52,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:52,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:52,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:52,075 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 02:43:52,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:52,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:52,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1323058908, now seen corresponding path program 4 times [2023-08-31 02:43:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:52,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947476627] [2023-08-31 02:43:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:52,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:52,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947476627] [2023-08-31 02:43:52,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947476627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:52,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590331725] [2023-08-31 02:43:52,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:43:52,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:52,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:52,387 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 02:43:52,415 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 02:43:52,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:43:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:43:52,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:43:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:52,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:52,641 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 02:43:52,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590331725] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:52,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:43:52,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-31 02:43:52,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207528130] [2023-08-31 02:43:52,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:52,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:43:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:52,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:43:52,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-31 02:43:52,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-31 02:43:52,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 777 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:52,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:52,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-31 02:43:52,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:53,147 INFO L130 PetriNetUnfolder]: 1611/2320 cut-off events. [2023-08-31 02:43:53,147 INFO L131 PetriNetUnfolder]: For 8614/8614 co-relation queries the response was YES. [2023-08-31 02:43:53,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10748 conditions, 2320 events. 1611/2320 cut-off events. For 8614/8614 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10623 event pairs, 217 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 10713. Up to 770 conditions per place. [2023-08-31 02:43:53,176 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 81 selfloop transitions, 54 changer transitions 0/136 dead transitions. [2023-08-31 02:43:53,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 136 transitions, 1287 flow [2023-08-31 02:43:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 02:43:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 02:43:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1092 transitions. [2023-08-31 02:43:53,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44282238442822386 [2023-08-31 02:43:53,179 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1092 transitions. [2023-08-31 02:43:53,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1092 transitions. [2023-08-31 02:43:53,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:53,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1092 transitions. [2023-08-31 02:43:53,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.33333333333333) internal successors, (1092), 9 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 02:43:53,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 02:43:53,186 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 02:43:53,187 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 777 flow. Second operand 9 states and 1092 transitions. [2023-08-31 02:43:53,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 136 transitions, 1287 flow [2023-08-31 02:43:53,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1262 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-31 02:43:53,221 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 1016 flow [2023-08-31 02:43:53,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2023-08-31 02:43:53,222 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-08-31 02:43:53,222 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 1016 flow [2023-08-31 02:43:53,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:53,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:53,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:53,232 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 02:43:53,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:53,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:53,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1413007916, now seen corresponding path program 5 times [2023-08-31 02:43:53,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:53,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272746810] [2023-08-31 02:43:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:53,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:53,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:53,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272746810] [2023-08-31 02:43:53,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272746810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:53,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793285472] [2023-08-31 02:43:53,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:43:53,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:53,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:53,536 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 02:43:53,548 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 02:43:53,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:43:53,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:43:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:43:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:53,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:53,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793285472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:43:53,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:43:53,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-31 02:43:53,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352019877] [2023-08-31 02:43:53,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:43:53,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:43:53,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:43:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:43:53,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 274 [2023-08-31 02:43:53,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 1016 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 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 02:43:53,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:53,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 274 [2023-08-31 02:43:53,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:54,707 INFO L130 PetriNetUnfolder]: 1887/2767 cut-off events. [2023-08-31 02:43:54,707 INFO L131 PetriNetUnfolder]: For 15862/15862 co-relation queries the response was YES. [2023-08-31 02:43:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14436 conditions, 2767 events. 1887/2767 cut-off events. For 15862/15862 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12397 event pairs, 30 based on Foata normal form. 14/2780 useless extension candidates. Maximal degree in co-relation 14396. Up to 727 conditions per place. [2023-08-31 02:43:54,732 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 144 selfloop transitions, 160 changer transitions 0/304 dead transitions. [2023-08-31 02:43:54,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 304 transitions, 3651 flow [2023-08-31 02:43:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:43:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:43:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2447 transitions. [2023-08-31 02:43:54,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42526937782412233 [2023-08-31 02:43:54,739 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2447 transitions. [2023-08-31 02:43:54,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2447 transitions. [2023-08-31 02:43:54,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:54,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2447 transitions. [2023-08-31 02:43:54,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 116.52380952380952) internal successors, (2447), 21 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states 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 02:43:54,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states 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 02:43:54,754 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states 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 02:43:54,754 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 1016 flow. Second operand 21 states and 2447 transitions. [2023-08-31 02:43:54,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 304 transitions, 3651 flow [2023-08-31 02:43:54,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 304 transitions, 3553 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-31 02:43:54,808 INFO L231 Difference]: Finished difference. Result has 98 places, 199 transitions, 2868 flow [2023-08-31 02:43:54,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2868, PETRI_PLACES=98, PETRI_TRANSITIONS=199} [2023-08-31 02:43:54,809 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2023-08-31 02:43:54,809 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 199 transitions, 2868 flow [2023-08-31 02:43:54,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 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 02:43:54,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:54,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:54,816 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 02:43:55,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:55,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:55,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 533701012, now seen corresponding path program 6 times [2023-08-31 02:43:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:55,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958090901] [2023-08-31 02:43:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:55,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:55,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958090901] [2023-08-31 02:43:55,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958090901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:55,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413896609] [2023-08-31 02:43:55,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:43:55,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:55,145 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 02:43:55,147 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 02:43:55,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:43:55,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:43:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:43:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:55,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:55,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413896609] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:55,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:43:55,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-08-31 02:43:55,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769182638] [2023-08-31 02:43:55,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:55,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:43:55,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:43:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:43:55,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-31 02:43:55,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 199 transitions, 2868 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:55,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:55,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-31 02:43:55,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:55,977 INFO L130 PetriNetUnfolder]: 1846/2692 cut-off events. [2023-08-31 02:43:55,978 INFO L131 PetriNetUnfolder]: For 20393/20393 co-relation queries the response was YES. [2023-08-31 02:43:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15823 conditions, 2692 events. 1846/2692 cut-off events. For 20393/20393 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11980 event pairs, 176 based on Foata normal form. 14/2705 useless extension candidates. Maximal degree in co-relation 15775. Up to 764 conditions per place. [2023-08-31 02:43:56,006 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 75 selfloop transitions, 152 changer transitions 0/236 dead transitions. [2023-08-31 02:43:56,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 236 transitions, 3478 flow [2023-08-31 02:43:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:43:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:43:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 962 transitions. [2023-08-31 02:43:56,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43886861313868614 [2023-08-31 02:43:56,009 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 962 transitions. [2023-08-31 02:43:56,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 962 transitions. [2023-08-31 02:43:56,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:56,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 962 transitions. [2023-08-31 02:43:56,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.25) internal successors, (962), 8 states have internal predecessors, (962), 0 states have call successors, (0), 0 states 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 02:43:56,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 02:43:56,015 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 02:43:56,016 INFO L175 Difference]: Start difference. First operand has 98 places, 199 transitions, 2868 flow. Second operand 8 states and 962 transitions. [2023-08-31 02:43:56,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 236 transitions, 3478 flow [2023-08-31 02:43:56,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 236 transitions, 3249 flow, removed 77 selfloop flow, removed 3 redundant places. [2023-08-31 02:43:56,106 INFO L231 Difference]: Finished difference. Result has 105 places, 202 transitions, 3194 flow [2023-08-31 02:43:56,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3194, PETRI_PLACES=105, PETRI_TRANSITIONS=202} [2023-08-31 02:43:56,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2023-08-31 02:43:56,107 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 202 transitions, 3194 flow [2023-08-31 02:43:56,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 02:43:56,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:56,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:56,117 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 02:43:56,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:56,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:56,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1990448776, now seen corresponding path program 1 times [2023-08-31 02:43:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:56,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526221741] [2023-08-31 02:43:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:56,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526221741] [2023-08-31 02:43:56,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526221741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:56,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67577175] [2023-08-31 02:43:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:56,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:56,399 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 02:43:56,425 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 02:43:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:43:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:56,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:56,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67577175] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:56,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:43:56,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-31 02:43:56,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651838644] [2023-08-31 02:43:56,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:43:56,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:43:56,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:43:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-31 02:43:56,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 274 [2023-08-31 02:43:56,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 202 transitions, 3194 flow. Second operand has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 02:43:56,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:56,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 274 [2023-08-31 02:43:56,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:56,994 INFO L130 PetriNetUnfolder]: 1718/2489 cut-off events. [2023-08-31 02:43:56,995 INFO L131 PetriNetUnfolder]: For 26288/26611 co-relation queries the response was YES. [2023-08-31 02:43:57,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15963 conditions, 2489 events. 1718/2489 cut-off events. For 26288/26611 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11148 event pairs, 505 based on Foata normal form. 320/2739 useless extension candidates. Maximal degree in co-relation 15912. Up to 1920 conditions per place. [2023-08-31 02:43:57,017 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 243 selfloop transitions, 13 changer transitions 0/275 dead transitions. [2023-08-31 02:43:57,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 275 transitions, 4786 flow [2023-08-31 02:43:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:43:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:43:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2023-08-31 02:43:57,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45474452554744527 [2023-08-31 02:43:57,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2023-08-31 02:43:57,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2023-08-31 02:43:57,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:57,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2023-08-31 02:43:57,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 02:43:57,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 02:43:57,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 02:43:57,023 INFO L175 Difference]: Start difference. First operand has 105 places, 202 transitions, 3194 flow. Second operand 5 states and 623 transitions. [2023-08-31 02:43:57,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 275 transitions, 4786 flow [2023-08-31 02:43:57,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 275 transitions, 4615 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-31 02:43:57,093 INFO L231 Difference]: Finished difference. Result has 105 places, 203 transitions, 3110 flow [2023-08-31 02:43:57,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3110, PETRI_PLACES=105, PETRI_TRANSITIONS=203} [2023-08-31 02:43:57,094 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2023-08-31 02:43:57,094 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 203 transitions, 3110 flow [2023-08-31 02:43:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 02:43:57,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:57,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:57,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:43:57,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:57,300 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:57,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 3263289, now seen corresponding path program 1 times [2023-08-31 02:43:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:57,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002908143] [2023-08-31 02:43:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:57,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002908143] [2023-08-31 02:43:57,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002908143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897181200] [2023-08-31 02:43:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:57,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:57,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:57,834 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 02:43:57,843 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 02:43:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 02:43:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:58,016 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 02:43:58,053 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 02:43:58,085 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 02:43:58,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:43:58,164 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 02:43:58,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:43:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897181200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:43:58,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:43:58,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5] total 15 [2023-08-31 02:43:58,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691476089] [2023-08-31 02:43:58,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:43:58,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:43:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:43:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:43:58,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 274 [2023-08-31 02:43:58,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 203 transitions, 3110 flow. Second operand has 17 states, 17 states have (on average 107.52941176470588) internal successors, (1828), 17 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 02:43:58,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:58,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 274 [2023-08-31 02:43:58,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:59,517 INFO L130 PetriNetUnfolder]: 2808/4087 cut-off events. [2023-08-31 02:43:59,517 INFO L131 PetriNetUnfolder]: For 35184/35377 co-relation queries the response was YES. [2023-08-31 02:43:59,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 4087 events. 2808/4087 cut-off events. For 35184/35377 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19427 event pairs, 415 based on Foata normal form. 167/4232 useless extension candidates. Maximal degree in co-relation 25459. Up to 2601 conditions per place. [2023-08-31 02:43:59,556 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 304 selfloop transitions, 124 changer transitions 1/443 dead transitions. [2023-08-31 02:43:59,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 443 transitions, 6977 flow [2023-08-31 02:43:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:43:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:43:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1504 transitions. [2023-08-31 02:43:59,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42223469960696236 [2023-08-31 02:43:59,561 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1504 transitions. [2023-08-31 02:43:59,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1504 transitions. [2023-08-31 02:43:59,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:43:59,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1504 transitions. [2023-08-31 02:43:59,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.6923076923077) internal successors, (1504), 13 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 02:43:59,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:43:59,570 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:43:59,570 INFO L175 Difference]: Start difference. First operand has 105 places, 203 transitions, 3110 flow. Second operand 13 states and 1504 transitions. [2023-08-31 02:43:59,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 443 transitions, 6977 flow [2023-08-31 02:43:59,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 443 transitions, 6940 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-31 02:43:59,726 INFO L231 Difference]: Finished difference. Result has 122 places, 295 transitions, 5023 flow [2023-08-31 02:43:59,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5023, PETRI_PLACES=122, PETRI_TRANSITIONS=295} [2023-08-31 02:43:59,727 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2023-08-31 02:43:59,727 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 295 transitions, 5023 flow [2023-08-31 02:43:59,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.52941176470588) internal successors, (1828), 17 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 02:43:59,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:59,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:59,737 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 02:43:59,938 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,SelfDestructingSolverStorable11 [2023-08-31 02:43:59,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:43:59,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1941319685, now seen corresponding path program 1 times [2023-08-31 02:43:59,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:59,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178010356] [2023-08-31 02:43:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:44:00,551 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 02:44:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:44:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178010356] [2023-08-31 02:44:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178010356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:44:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190117279] [2023-08-31 02:44:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:44:00,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:44:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:44:00,553 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 02:44:00,580 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 02:44:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:44:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 02:44:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:44:01,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:01,005 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 17 treesize of output 15 [2023-08-31 02:44:01,089 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 02:44:01,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:44:01,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:01,209 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 16 [2023-08-31 02:44:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:44:01,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190117279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:44:01,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:44:01,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2023-08-31 02:44:01,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103433389] [2023-08-31 02:44:01,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:44:01,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 02:44:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:44:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 02:44:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-08-31 02:44:02,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-31 02:44:02,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 295 transitions, 5023 flow. Second operand has 28 states, 28 states have (on average 97.17857142857143) internal successors, (2721), 28 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states 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 02:44:02,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:44:02,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-31 02:44:02,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:44:06,048 INFO L130 PetriNetUnfolder]: 5451/8012 cut-off events. [2023-08-31 02:44:06,049 INFO L131 PetriNetUnfolder]: For 85174/85174 co-relation queries the response was YES. [2023-08-31 02:44:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54672 conditions, 8012 events. 5451/8012 cut-off events. For 85174/85174 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42715 event pairs, 420 based on Foata normal form. 4/8014 useless extension candidates. Maximal degree in co-relation 53139. Up to 4552 conditions per place. [2023-08-31 02:44:06,118 INFO L137 encePairwiseOnDemand]: 259/274 looper letters, 517 selfloop transitions, 375 changer transitions 9/901 dead transitions. [2023-08-31 02:44:06,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 901 transitions, 15005 flow [2023-08-31 02:44:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 02:44:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 02:44:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3750 transitions. [2023-08-31 02:44:06,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38017031630170317 [2023-08-31 02:44:06,127 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3750 transitions. [2023-08-31 02:44:06,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3750 transitions. [2023-08-31 02:44:06,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:44:06,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3750 transitions. [2023-08-31 02:44:06,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.16666666666667) internal successors, (3750), 36 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 02:44:06,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 274.0) internal successors, (10138), 37 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states 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 02:44:06,146 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 274.0) internal successors, (10138), 37 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states 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 02:44:06,146 INFO L175 Difference]: Start difference. First operand has 122 places, 295 transitions, 5023 flow. Second operand 36 states and 3750 transitions. [2023-08-31 02:44:06,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 901 transitions, 15005 flow [2023-08-31 02:44:06,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 901 transitions, 14823 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-31 02:44:06,600 INFO L231 Difference]: Finished difference. Result has 170 places, 603 transitions, 11912 flow [2023-08-31 02:44:06,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11912, PETRI_PLACES=170, PETRI_TRANSITIONS=603} [2023-08-31 02:44:06,601 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 138 predicate places. [2023-08-31 02:44:06,601 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 603 transitions, 11912 flow [2023-08-31 02:44:06,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.17857142857143) internal successors, (2721), 28 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states 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 02:44:06,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:44:06,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:44:06,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:44:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 02:44:06,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:44:06,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:44:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 246589533, now seen corresponding path program 2 times [2023-08-31 02:44:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:44:06,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904511837] [2023-08-31 02:44:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:44:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:44:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:44:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:44:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:44:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904511837] [2023-08-31 02:44:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904511837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:44:07,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475130522] [2023-08-31 02:44:07,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:44:07,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:44:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:44:07,252 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 02:44:07,255 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 02:44:07,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:44:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:44:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 02:44:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:44:07,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:44:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:44:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:44:07,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:07,503 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 19 treesize of output 16 [2023-08-31 02:44:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:44:07,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475130522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:44:07,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:44:07,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-31 02:44:07,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062437580] [2023-08-31 02:44:07,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:44:07,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:44:07,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:44:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:44:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:44:07,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-31 02:44:07,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 603 transitions, 11912 flow. Second operand has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 02:44:07,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:44:07,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-31 02:44:07,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:44:09,840 INFO L130 PetriNetUnfolder]: 7193/10612 cut-off events. [2023-08-31 02:44:09,840 INFO L131 PetriNetUnfolder]: For 168243/168713 co-relation queries the response was YES. [2023-08-31 02:44:09,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82501 conditions, 10612 events. 7193/10612 cut-off events. For 168243/168713 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 61372 event pairs, 786 based on Foata normal form. 354/10876 useless extension candidates. Maximal degree in co-relation 82293. Up to 6266 conditions per place. [2023-08-31 02:44:09,962 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 511 selfloop transitions, 368 changer transitions 1/905 dead transitions. [2023-08-31 02:44:09,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 905 transitions, 18562 flow [2023-08-31 02:44:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:44:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:44:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1377 transitions. [2023-08-31 02:44:09,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568679495686795 [2023-08-31 02:44:09,965 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1377 transitions. [2023-08-31 02:44:09,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1377 transitions. [2023-08-31 02:44:09,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:44:09,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1377 transitions. [2023-08-31 02:44:09,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.18181818181819) internal successors, (1377), 11 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 02:44:09,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 02:44:09,972 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 02:44:09,972 INFO L175 Difference]: Start difference. First operand has 170 places, 603 transitions, 11912 flow. Second operand 11 states and 1377 transitions. [2023-08-31 02:44:09,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 905 transitions, 18562 flow [2023-08-31 02:44:11,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 905 transitions, 18110 flow, removed 225 selfloop flow, removed 1 redundant places. [2023-08-31 02:44:11,038 INFO L231 Difference]: Finished difference. Result has 185 places, 747 transitions, 15579 flow [2023-08-31 02:44:11,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=11598, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15579, PETRI_PLACES=185, PETRI_TRANSITIONS=747} [2023-08-31 02:44:11,039 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 153 predicate places. [2023-08-31 02:44:11,039 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 747 transitions, 15579 flow [2023-08-31 02:44:11,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 02:44:11,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:44:11,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:44:11,045 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 02:44:11,240 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,SelfDestructingSolverStorable13 [2023-08-31 02:44:11,241 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:44:11,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:44:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 818684429, now seen corresponding path program 2 times [2023-08-31 02:44:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:44:11,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711135293] [2023-08-31 02:44:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:44:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:44:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:44:12,136 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 02:44:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:44:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711135293] [2023-08-31 02:44:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711135293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:44:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684485977] [2023-08-31 02:44:12,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:44:12,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:44:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:44:12,141 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 02:44:12,171 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 02:44:12,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:44:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:44:12,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 02:44:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:44:12,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:12,480 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 17 treesize of output 15 [2023-08-31 02:44:12,626 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 02:44:12,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:44:12,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:12,788 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 16 [2023-08-31 02:44:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:44:12,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684485977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:44:12,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:44:12,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-31 02:44:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418422608] [2023-08-31 02:44:12,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:44:12,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 02:44:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:44:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 02:44:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-08-31 02:44:14,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 274 [2023-08-31 02:44:14,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 747 transitions, 15579 flow. Second operand has 31 states, 31 states have (on average 90.03225806451613) internal successors, (2791), 31 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:44:14,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:44:14,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 274 [2023-08-31 02:44:14,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:44:21,148 INFO L130 PetriNetUnfolder]: 12880/19067 cut-off events. [2023-08-31 02:44:21,149 INFO L131 PetriNetUnfolder]: For 331470/331470 co-relation queries the response was YES. [2023-08-31 02:44:21,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154945 conditions, 19067 events. 12880/19067 cut-off events. For 331470/331470 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 119864 event pairs, 1424 based on Foata normal form. 9/19076 useless extension candidates. Maximal degree in co-relation 154692. Up to 9189 conditions per place. [2023-08-31 02:44:21,389 INFO L137 encePairwiseOnDemand]: 259/274 looper letters, 760 selfloop transitions, 1216 changer transitions 12/1988 dead transitions. [2023-08-31 02:44:21,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1988 transitions, 39870 flow [2023-08-31 02:44:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-31 02:44:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-31 02:44:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7303 transitions. [2023-08-31 02:44:21,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507011140991164 [2023-08-31 02:44:21,401 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7303 transitions. [2023-08-31 02:44:21,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7303 transitions. [2023-08-31 02:44:21,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:44:21,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7303 transitions. [2023-08-31 02:44:21,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 96.09210526315789) internal successors, (7303), 76 states have internal predecessors, (7303), 0 states have call successors, (0), 0 states 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 02:44:21,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 274.0) internal successors, (21098), 77 states have internal predecessors, (21098), 0 states have call successors, (0), 0 states 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 02:44:21,442 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 274.0) internal successors, (21098), 77 states have internal predecessors, (21098), 0 states have call successors, (0), 0 states 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 02:44:21,442 INFO L175 Difference]: Start difference. First operand has 185 places, 747 transitions, 15579 flow. Second operand 76 states and 7303 transitions. [2023-08-31 02:44:21,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1988 transitions, 39870 flow [2023-08-31 02:44:24,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1988 transitions, 38677 flow, removed 403 selfloop flow, removed 2 redundant places. [2023-08-31 02:44:24,225 INFO L231 Difference]: Finished difference. Result has 289 places, 1566 transitions, 35700 flow [2023-08-31 02:44:24,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=15053, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=35700, PETRI_PLACES=289, PETRI_TRANSITIONS=1566} [2023-08-31 02:44:24,226 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 257 predicate places. [2023-08-31 02:44:24,226 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 1566 transitions, 35700 flow [2023-08-31 02:44:24,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 90.03225806451613) internal successors, (2791), 31 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:44:24,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:44:24,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:44:24,235 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 02:44:24,432 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,SelfDestructingSolverStorable14 [2023-08-31 02:44:24,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:44:24,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:44:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 665140195, now seen corresponding path program 3 times [2023-08-31 02:44:24,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:44:24,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143248170] [2023-08-31 02:44:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:44:24,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:44:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:44:25,286 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 02:44:25,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:44:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143248170] [2023-08-31 02:44:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143248170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:44:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771439299] [2023-08-31 02:44:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:44:25,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:44:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:44:25,288 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 02:44:25,291 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 02:44:25,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:44:25,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:44:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 02:44:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:44:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:44:25,665 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 14 treesize of output 16 [2023-08-31 02:44:25,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:25,778 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 17 treesize of output 15 [2023-08-31 02:44:25,883 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 02:44:25,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:44:26,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:26,221 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 54 treesize of output 38 [2023-08-31 02:44:26,226 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 17 treesize of output 11 [2023-08-31 02:44:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:44:26,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771439299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:44:26,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:44:26,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-08-31 02:44:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063505306] [2023-08-31 02:44:26,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:44:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 02:44:26,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:44:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 02:44:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=987, Unknown=4, NotChecked=0, Total=1122 [2023-08-31 02:44:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 274 [2023-08-31 02:44:27,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1566 transitions, 35700 flow. Second operand has 34 states, 34 states have (on average 70.79411764705883) internal successors, (2407), 34 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 02:44:27,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:44:27,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 274 [2023-08-31 02:44:27,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:44:40,058 INFO L130 PetriNetUnfolder]: 16411/24255 cut-off events. [2023-08-31 02:44:40,058 INFO L131 PetriNetUnfolder]: For 522053/522053 co-relation queries the response was YES. [2023-08-31 02:44:40,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221910 conditions, 24255 events. 16411/24255 cut-off events. For 522053/522053 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 157504 event pairs, 1220 based on Foata normal form. 6/24261 useless extension candidates. Maximal degree in co-relation 221466. Up to 10730 conditions per place. [2023-08-31 02:44:40,456 INFO L137 encePairwiseOnDemand]: 257/274 looper letters, 745 selfloop transitions, 1855 changer transitions 12/2612 dead transitions. [2023-08-31 02:44:40,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 2612 transitions, 58363 flow [2023-08-31 02:44:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 02:44:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 02:44:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5035 transitions. [2023-08-31 02:44:40,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871236313868613 [2023-08-31 02:44:40,475 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5035 transitions. [2023-08-31 02:44:40,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5035 transitions. [2023-08-31 02:44:40,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:44:40,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5035 transitions. [2023-08-31 02:44:40,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 78.671875) internal successors, (5035), 64 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states 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 02:44:40,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 274.0) internal successors, (17810), 65 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states 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 02:44:40,501 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 274.0) internal successors, (17810), 65 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states 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 02:44:40,501 INFO L175 Difference]: Start difference. First operand has 289 places, 1566 transitions, 35700 flow. Second operand 64 states and 5035 transitions. [2023-08-31 02:44:40,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 2612 transitions, 58363 flow [2023-08-31 02:44:48,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2612 transitions, 56308 flow, removed 950 selfloop flow, removed 5 redundant places. [2023-08-31 02:44:48,367 INFO L231 Difference]: Finished difference. Result has 377 places, 2234 transitions, 55044 flow [2023-08-31 02:44:48,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=34171, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=55044, PETRI_PLACES=377, PETRI_TRANSITIONS=2234} [2023-08-31 02:44:48,369 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 345 predicate places. [2023-08-31 02:44:48,369 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2234 transitions, 55044 flow [2023-08-31 02:44:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.79411764705883) internal successors, (2407), 34 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 02:44:48,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:44:48,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:44:48,379 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 02:44:48,578 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,SelfDestructingSolverStorable15 [2023-08-31 02:44:48,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:44:48,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:44:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1207527799, now seen corresponding path program 3 times [2023-08-31 02:44:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:44:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883291871] [2023-08-31 02:44:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:44:48,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:44:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:44:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:44:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:44:48,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883291871] [2023-08-31 02:44:48,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883291871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:44:48,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861671345] [2023-08-31 02:44:48,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:44:48,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:44:48,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:44:48,965 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 02:44:48,969 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 02:44:49,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:44:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:44:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 02:44:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:44:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:44:49,264 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 14 treesize of output 16 [2023-08-31 02:44:49,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:44:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:44:49,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:44:49,366 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_658 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_658) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))))) is different from false [2023-08-31 02:44:49,372 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_658 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_658) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2023-08-31 02:44:49,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:44:49,385 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 46 treesize of output 34 [2023-08-31 02:44:49,389 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 11 [2023-08-31 02:44:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-31 02:44:49,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861671345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:44:49,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:44:49,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-31 02:44:49,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603565889] [2023-08-31 02:44:49,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:44:49,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:44:49,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:44:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:44:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=311, Unknown=2, NotChecked=74, Total=462 [2023-08-31 02:44:49,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-31 02:44:49,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2234 transitions, 55044 flow. Second operand has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states 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 02:44:49,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:44:49,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-31 02:44:49,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:45:01,013 INFO L130 PetriNetUnfolder]: 16753/24793 cut-off events. [2023-08-31 02:45:01,013 INFO L131 PetriNetUnfolder]: For 728939/729671 co-relation queries the response was YES. [2023-08-31 02:45:01,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250507 conditions, 24793 events. 16753/24793 cut-off events. For 728939/729671 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 163375 event pairs, 1713 based on Foata normal form. 352/24903 useless extension candidates. Maximal degree in co-relation 250006. Up to 14651 conditions per place. [2023-08-31 02:45:01,801 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1214 selfloop transitions, 1178 changer transitions 2/2449 dead transitions. [2023-08-31 02:45:01,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2449 transitions, 63541 flow [2023-08-31 02:45:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:45:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:45:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1402 transitions. [2023-08-31 02:45:01,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935991016282987 [2023-08-31 02:45:01,803 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1402 transitions. [2023-08-31 02:45:01,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1402 transitions. [2023-08-31 02:45:01,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:45:01,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1402 transitions. [2023-08-31 02:45:01,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.84615384615384) internal successors, (1402), 13 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:45:01,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:45:01,809 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:45:01,809 INFO L175 Difference]: Start difference. First operand has 377 places, 2234 transitions, 55044 flow. Second operand 13 states and 1402 transitions. [2023-08-31 02:45:01,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2449 transitions, 63541 flow [2023-08-31 02:45:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 2449 transitions, 61866 flow, removed 816 selfloop flow, removed 5 redundant places. [2023-08-31 02:45:16,773 INFO L231 Difference]: Finished difference. Result has 390 places, 2316 transitions, 58068 flow [2023-08-31 02:45:16,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=53511, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58068, PETRI_PLACES=390, PETRI_TRANSITIONS=2316} [2023-08-31 02:45:16,775 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 358 predicate places. [2023-08-31 02:45:16,775 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 2316 transitions, 58068 flow [2023-08-31 02:45:16,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states 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 02:45:16,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:45:16,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:45:16,788 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 02:45:16,982 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,SelfDestructingSolverStorable16 [2023-08-31 02:45:16,982 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:45:16,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:45:16,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1758949043, now seen corresponding path program 4 times [2023-08-31 02:45:16,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:45:16,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694002641] [2023-08-31 02:45:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:45:16,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:45:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:45:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:45:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:45:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694002641] [2023-08-31 02:45:17,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694002641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:45:17,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311953183] [2023-08-31 02:45:17,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:45:17,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:45:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:45:17,327 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 02:45:17,330 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 02:45:17,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:45:17,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:45:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 02:45:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:45:17,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:45:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:45:17,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:45:17,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:45:17,580 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 16 [2023-08-31 02:45:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:45:17,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311953183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:45:17,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:45:17,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-31 02:45:17,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8092264] [2023-08-31 02:45:17,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:45:17,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:45:17,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:45:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:45:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:45:17,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-31 02:45:17,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 2316 transitions, 58068 flow. Second operand has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 02:45:17,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:45:17,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-31 02:45:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:45:31,404 INFO L130 PetriNetUnfolder]: 19717/29132 cut-off events. [2023-08-31 02:45:31,404 INFO L131 PetriNetUnfolder]: For 933011/934114 co-relation queries the response was YES. [2023-08-31 02:45:32,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298065 conditions, 29132 events. 19717/29132 cut-off events. For 933011/934114 co-relation queries the response was YES. Maximal size of possible extension queue 1536. Compared 196633 event pairs, 4793 based on Foata normal form. 558/29342 useless extension candidates. Maximal degree in co-relation 297513. Up to 23691 conditions per place. [2023-08-31 02:45:32,321 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1931 selfloop transitions, 805 changer transitions 1/2792 dead transitions. [2023-08-31 02:45:32,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2792 transitions, 74500 flow [2023-08-31 02:45:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:45:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:45:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1370 transitions. [2023-08-31 02:45:32,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-31 02:45:32,323 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1370 transitions. [2023-08-31 02:45:32,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1370 transitions. [2023-08-31 02:45:32,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:45:32,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1370 transitions. [2023-08-31 02:45:32,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.54545454545455) internal successors, (1370), 11 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states 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 02:45:32,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 02:45:32,328 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 02:45:32,328 INFO L175 Difference]: Start difference. First operand has 390 places, 2316 transitions, 58068 flow. Second operand 11 states and 1370 transitions. [2023-08-31 02:45:32,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2792 transitions, 74500 flow [2023-08-31 02:45:50,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 2792 transitions, 73290 flow, removed 77 selfloop flow, removed 3 redundant places. [2023-08-31 02:45:50,879 INFO L231 Difference]: Finished difference. Result has 403 places, 2602 transitions, 67072 flow [2023-08-31 02:45:50,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=57003, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=67072, PETRI_PLACES=403, PETRI_TRANSITIONS=2602} [2023-08-31 02:45:50,882 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 371 predicate places. [2023-08-31 02:45:50,883 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 2602 transitions, 67072 flow [2023-08-31 02:45:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 02:45:50,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:45:50,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:45:50,891 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 02:45:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:45:51,088 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:45:51,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:45:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -209660607, now seen corresponding path program 5 times [2023-08-31 02:45:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:45:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081398425] [2023-08-31 02:45:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:45:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:45:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:45:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:45:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:45:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081398425] [2023-08-31 02:45:51,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081398425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:45:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238142039] [2023-08-31 02:45:51,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:45:51,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:45:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:45:51,421 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 02:45:51,450 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 02:45:51,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:45:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:45:51,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 02:45:51,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:45:51,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-31 02:45:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:45:51,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:45:51,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:45:51,703 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 16 [2023-08-31 02:45:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:45:51,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238142039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:45:51,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:45:51,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-08-31 02:45:51,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208068905] [2023-08-31 02:45:51,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:45:51,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 02:45:51,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:45:51,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 02:45:51,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-31 02:45:51,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-31 02:45:51,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 2602 transitions, 67072 flow. Second operand has 14 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 02:45:51,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:45:51,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-31 02:45:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:46:07,822 INFO L130 PetriNetUnfolder]: 20363/30059 cut-off events. [2023-08-31 02:46:07,822 INFO L131 PetriNetUnfolder]: For 975206/976288 co-relation queries the response was YES. [2023-08-31 02:46:08,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314847 conditions, 30059 events. 20363/30059 cut-off events. For 975206/976288 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 203597 event pairs, 5544 based on Foata normal form. 574/30242 useless extension candidates. Maximal degree in co-relation 314280. Up to 27584 conditions per place. [2023-08-31 02:46:08,801 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 2195 selfloop transitions, 580 changer transitions 1/2831 dead transitions. [2023-08-31 02:46:08,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2831 transitions, 77135 flow [2023-08-31 02:46:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:46:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:46:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1348 transitions. [2023-08-31 02:46:08,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44724618447246184 [2023-08-31 02:46:08,803 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1348 transitions. [2023-08-31 02:46:08,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1348 transitions. [2023-08-31 02:46:08,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:46:08,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1348 transitions. [2023-08-31 02:46:08,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 122.54545454545455) internal successors, (1348), 11 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states 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 02:46:08,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 02:46:08,808 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 02:46:08,808 INFO L175 Difference]: Start difference. First operand has 403 places, 2602 transitions, 67072 flow. Second operand 11 states and 1348 transitions. [2023-08-31 02:46:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2831 transitions, 77135 flow [2023-08-31 02:46:28,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 2831 transitions, 75959 flow, removed 343 selfloop flow, removed 3 redundant places. [2023-08-31 02:46:28,793 INFO L231 Difference]: Finished difference. Result has 413 places, 2711 transitions, 69927 flow [2023-08-31 02:46:28,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=65896, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=69927, PETRI_PLACES=413, PETRI_TRANSITIONS=2711} [2023-08-31 02:46:28,796 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 381 predicate places. [2023-08-31 02:46:28,796 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 2711 transitions, 69927 flow [2023-08-31 02:46:28,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 02:46:28,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:46:28,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:46:28,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 02:46:29,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:46:29,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:46:29,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:46:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1100337783, now seen corresponding path program 4 times [2023-08-31 02:46:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:46:29,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219951573] [2023-08-31 02:46:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:46:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:46:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:46:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:46:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:46:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219951573] [2023-08-31 02:46:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219951573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:46:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64012484] [2023-08-31 02:46:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:46:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:46:29,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:46:29,509 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 02:46:29,513 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 02:46:29,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:46:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:46:29,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 02:46:29,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:46:29,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:46:29,957 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 17 treesize of output 15 [2023-08-31 02:46:30,004 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 02:46:30,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:46:30,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:46:30,085 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 16 [2023-08-31 02:46:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:46:30,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64012484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:46:30,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:46:30,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 27 [2023-08-31 02:46:30,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228712176] [2023-08-31 02:46:30,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:46:30,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 02:46:30,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:46:30,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 02:46:30,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-08-31 02:46:31,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-31 02:46:31,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 2711 transitions, 69927 flow. Second operand has 29 states, 29 states have (on average 97.0) internal successors, (2813), 29 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 02:46:31,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:46:31,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-31 02:46:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:46:52,179 INFO L130 PetriNetUnfolder]: 22523/33297 cut-off events. [2023-08-31 02:46:52,180 INFO L131 PetriNetUnfolder]: For 1009333/1009333 co-relation queries the response was YES. [2023-08-31 02:46:53,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346535 conditions, 33297 events. 22523/33297 cut-off events. For 1009333/1009333 co-relation queries the response was YES. Maximal size of possible extension queue 1674. Compared 226853 event pairs, 4962 based on Foata normal form. 4/33301 useless extension candidates. Maximal degree in co-relation 345956. Up to 24600 conditions per place. [2023-08-31 02:46:53,379 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 1754 selfloop transitions, 1436 changer transitions 9/3199 dead transitions. [2023-08-31 02:46:53,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 3199 transitions, 86309 flow [2023-08-31 02:46:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 02:46:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 02:46:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4403 transitions. [2023-08-31 02:46:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3737056526905449 [2023-08-31 02:46:53,386 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4403 transitions. [2023-08-31 02:46:53,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4403 transitions. [2023-08-31 02:46:53,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:46:53,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4403 transitions. [2023-08-31 02:46:53,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 102.3953488372093) internal successors, (4403), 43 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states 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 02:46:53,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 274.0) internal successors, (12056), 44 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states 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 02:46:53,403 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 274.0) internal successors, (12056), 44 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states 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 02:46:53,403 INFO L175 Difference]: Start difference. First operand has 413 places, 2711 transitions, 69927 flow. Second operand 43 states and 4403 transitions. [2023-08-31 02:46:53,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 3199 transitions, 86309 flow [2023-08-31 02:47:18,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 3199 transitions, 85047 flow, removed 289 selfloop flow, removed 6 redundant places. [2023-08-31 02:47:18,086 INFO L231 Difference]: Finished difference. Result has 463 places, 2999 transitions, 81530 flow [2023-08-31 02:47:18,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=68826, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=81530, PETRI_PLACES=463, PETRI_TRANSITIONS=2999} [2023-08-31 02:47:18,088 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 431 predicate places. [2023-08-31 02:47:18,088 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 2999 transitions, 81530 flow [2023-08-31 02:47:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.0) internal successors, (2813), 29 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 02:47:18,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:47:18,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:47:18,097 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 02:47:18,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:47:18,295 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:47:18,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:47:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1925660755, now seen corresponding path program 6 times [2023-08-31 02:47:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:47:18,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243278172] [2023-08-31 02:47:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:47:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:47:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:47:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:47:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:47:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243278172] [2023-08-31 02:47:18,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243278172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:47:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35875079] [2023-08-31 02:47:18,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:47:18,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:47:18,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:47:18,697 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 02:47:18,699 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 02:47:18,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:47:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:47:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 02:47:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:47:18,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:47:18,987 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 14 treesize of output 16 [2023-08-31 02:47:19,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:47:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:47:19,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:47:19,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:47:19,120 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 54 treesize of output 38 [2023-08-31 02:47:19,124 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 17 treesize of output 11 [2023-08-31 02:47:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:47:19,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35875079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:47:19,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:47:19,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-31 02:47:19,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975884101] [2023-08-31 02:47:19,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:47:19,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:47:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:47:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:47:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=407, Unknown=4, NotChecked=0, Total=506 [2023-08-31 02:47:19,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-31 02:47:19,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 2999 transitions, 81530 flow. Second operand has 23 states, 23 states have (on average 97.21739130434783) internal successors, (2236), 23 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states 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 02:47:19,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:47:19,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-31 02:47:19,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:47:41,120 INFO L130 PetriNetUnfolder]: 23882/35299 cut-off events. [2023-08-31 02:47:41,120 INFO L131 PetriNetUnfolder]: For 1301011/1302196 co-relation queries the response was YES. [2023-08-31 02:47:42,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386896 conditions, 35299 events. 23882/35299 cut-off events. For 1301011/1302196 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 244923 event pairs, 5438 based on Foata normal form. 625/35543 useless extension candidates. Maximal degree in co-relation 386112. Up to 27997 conditions per place. [2023-08-31 02:47:42,565 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 2342 selfloop transitions, 911 changer transitions 1/3314 dead transitions. [2023-08-31 02:47:42,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 3314 transitions, 95411 flow [2023-08-31 02:47:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 02:47:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 02:47:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2023-08-31 02:47:42,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38838199513381993 [2023-08-31 02:47:42,567 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2023-08-31 02:47:42,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2023-08-31 02:47:42,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:47:42,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2023-08-31 02:47:42,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 02:47:42,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 02:47:42,572 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 02:47:42,573 INFO L175 Difference]: Start difference. First operand has 463 places, 2999 transitions, 81530 flow. Second operand 12 states and 1277 transitions. [2023-08-31 02:47:42,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 3314 transitions, 95411 flow [2023-08-31 02:48:14,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 3314 transitions, 94373 flow, removed 346 selfloop flow, removed 6 redundant places. [2023-08-31 02:48:14,323 INFO L231 Difference]: Finished difference. Result has 474 places, 3162 transitions, 87596 flow [2023-08-31 02:48:14,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80614, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=774, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=87596, PETRI_PLACES=474, PETRI_TRANSITIONS=3162} [2023-08-31 02:48:14,326 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 442 predicate places. [2023-08-31 02:48:14,326 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 3162 transitions, 87596 flow [2023-08-31 02:48:14,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.21739130434783) internal successors, (2236), 23 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states 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 02:48:14,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:48:14,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:48:14,331 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 02:48:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:14,527 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:48:14,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:48:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1421372669, now seen corresponding path program 5 times [2023-08-31 02:48:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:48:14,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92120200] [2023-08-31 02:48:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:48:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:48:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:48:15,005 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 02:48:15,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:48:15,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92120200] [2023-08-31 02:48:15,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92120200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:48:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434742539] [2023-08-31 02:48:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:48:15,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:15,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:48:15,009 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 02:48:15,024 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 02:48:15,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:48:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:48:15,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 02:48:15,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:48:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:48:15,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:15,457 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 17 treesize of output 10 [2023-08-31 02:48:15,466 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 02:48:15,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:48:15,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:15,581 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 16 [2023-08-31 02:48:15,785 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 02:48:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434742539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:48:15,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:48:15,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 26 [2023-08-31 02:48:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033744488] [2023-08-31 02:48:15,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:48:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 02:48:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:48:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 02:48:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-08-31 02:48:16,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 274 [2023-08-31 02:48:16,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 3162 transitions, 87596 flow. Second operand has 28 states, 28 states have (on average 98.07142857142857) internal successors, (2746), 28 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states 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 02:48:16,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:48:16,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 274 [2023-08-31 02:48:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:02,840 INFO L130 PetriNetUnfolder]: 40359/61115 cut-off events. [2023-08-31 02:49:02,840 INFO L131 PetriNetUnfolder]: For 2324797/2324797 co-relation queries the response was YES. [2023-08-31 02:49:05,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663920 conditions, 61115 events. 40359/61115 cut-off events. For 2324797/2324797 co-relation queries the response was YES. Maximal size of possible extension queue 3148. Compared 475029 event pairs, 3384 based on Foata normal form. 11/61126 useless extension candidates. Maximal degree in co-relation 663154. Up to 18258 conditions per place. [2023-08-31 02:49:05,660 INFO L137 encePairwiseOnDemand]: 257/274 looper letters, 2631 selfloop transitions, 3595 changer transitions 20/6246 dead transitions. [2023-08-31 02:49:05,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 6246 transitions, 183469 flow [2023-08-31 02:49:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 02:49:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 02:49:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5157 transitions. [2023-08-31 02:49:05,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38410546700431997 [2023-08-31 02:49:05,665 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5157 transitions. [2023-08-31 02:49:05,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5157 transitions. [2023-08-31 02:49:05,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:05,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5157 transitions. [2023-08-31 02:49:05,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 105.24489795918367) internal successors, (5157), 49 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states 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 02:49:05,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 274.0) internal successors, (13700), 50 states have internal predecessors, (13700), 0 states have call successors, (0), 0 states 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 02:49:05,684 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 274.0) internal successors, (13700), 50 states have internal predecessors, (13700), 0 states have call successors, (0), 0 states 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 02:49:05,684 INFO L175 Difference]: Start difference. First operand has 474 places, 3162 transitions, 87596 flow. Second operand 49 states and 5157 transitions. [2023-08-31 02:49:05,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 6246 transitions, 183469 flow [2023-08-31 02:50:31,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 6246 transitions, 181650 flow, removed 718 selfloop flow, removed 2 redundant places. [2023-08-31 02:50:31,859 INFO L231 Difference]: Finished difference. Result has 535 places, 5085 transitions, 158215 flow [2023-08-31 02:50:31,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=86634, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1963, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=158215, PETRI_PLACES=535, PETRI_TRANSITIONS=5085} [2023-08-31 02:50:31,862 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 503 predicate places. [2023-08-31 02:50:31,862 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 5085 transitions, 158215 flow [2023-08-31 02:50:31,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.07142857142857) internal successors, (2746), 28 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states 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 02:50:31,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:50:31,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:50:31,868 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 02:50:32,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:50:32,064 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:50:32,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:50:32,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2024277337, now seen corresponding path program 7 times [2023-08-31 02:50:32,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:50:32,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345662025] [2023-08-31 02:50:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:50:32,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:50:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:50:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:50:32,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:50:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345662025] [2023-08-31 02:50:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345662025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:50:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220100959] [2023-08-31 02:50:32,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:50:32,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:50:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:50:32,465 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 02:50:32,497 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 02:50:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:50:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-31 02:50:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:50:32,644 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 02:50:32,678 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 02:50:32,715 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 02:50:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:50:32,821 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 14 treesize of output 16 [2023-08-31 02:50:32,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:50:32,862 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 02:50:32,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:50:32,902 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-08-31 02:50:32,961 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-31 02:50:32,970 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-08-31 02:50:32,982 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_926 (Array Int Int)) (v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_926) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927))) (= (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-31 02:50:32,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:50:32,991 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 54 treesize of output 43 [2023-08-31 02:50:32,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10294 treesize of output 9654 [2023-08-31 02:50:33,020 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 61 treesize of output 59 [2023-08-31 02:50:33,023 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 122 treesize of output 114 [2023-08-31 02:50:33,028 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 58 treesize of output 54 [2023-08-31 02:50:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-31 02:50:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220100959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:50:33,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:50:33,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-31 02:50:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551246136] [2023-08-31 02:50:33,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:50:33,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 02:50:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:50:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 02:50:33,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=379, Unknown=6, NotChecked=172, Total=650 [2023-08-31 02:50:33,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 274 [2023-08-31 02:50:33,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 5085 transitions, 158215 flow. Second operand has 26 states, 26 states have (on average 85.8076923076923) internal successors, (2231), 26 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states 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 02:50:33,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:50:33,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 274 [2023-08-31 02:50:33,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:51:54,915 INFO L130 PetriNetUnfolder]: 41527/63085 cut-off events. [2023-08-31 02:51:54,915 INFO L131 PetriNetUnfolder]: For 2992166/2994921 co-relation queries the response was YES. [2023-08-31 02:51:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752504 conditions, 63085 events. 41527/63085 cut-off events. For 2992166/2994921 co-relation queries the response was YES. Maximal size of possible extension queue 3483. Compared 498203 event pairs, 9324 based on Foata normal form. 1361/63803 useless extension candidates. Maximal degree in co-relation 752017. Up to 51793 conditions per place. [2023-08-31 02:51:58,216 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 4116 selfloop transitions, 1364 changer transitions 1/5579 dead transitions. [2023-08-31 02:51:58,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 5579 transitions, 183480 flow [2023-08-31 02:51:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:51:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:51:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1233 transitions. [2023-08-31 02:51:58,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2023-08-31 02:51:58,222 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1233 transitions. [2023-08-31 02:51:58,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1233 transitions. [2023-08-31 02:51:58,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:51:58,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1233 transitions. [2023-08-31 02:51:58,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 94.84615384615384) internal successors, (1233), 13 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 02:51:58,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:51:58,228 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:51:58,228 INFO L175 Difference]: Start difference. First operand has 535 places, 5085 transitions, 158215 flow. Second operand 13 states and 1233 transitions. [2023-08-31 02:51:58,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 5579 transitions, 183480 flow [2023-08-31 02:54:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 5579 transitions, 180336 flow, removed 1169 selfloop flow, removed 24 redundant places. [2023-08-31 02:54:07,667 INFO L231 Difference]: Finished difference. Result has 530 places, 5295 transitions, 167148 flow [2023-08-31 02:54:07,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=155364, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=167148, PETRI_PLACES=530, PETRI_TRANSITIONS=5295} [2023-08-31 02:54:07,671 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 498 predicate places. [2023-08-31 02:54:07,671 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 5295 transitions, 167148 flow [2023-08-31 02:54:07,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.8076923076923) internal successors, (2231), 26 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states 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 02:54:07,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:54:07,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:54:07,677 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 02:54:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:54:07,872 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:54:07,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:54:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1171616155, now seen corresponding path program 8 times [2023-08-31 02:54:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:54:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472268925] [2023-08-31 02:54:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:54:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:54:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:54:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:54:08,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:54:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472268925] [2023-08-31 02:54:08,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472268925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:54:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940260085] [2023-08-31 02:54:08,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:54:08,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:54:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:54:08,261 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 02:54:08,268 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 02:54:08,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:54:08,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:54:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 02:54:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:54:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:54:08,611 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 14 treesize of output 16 [2023-08-31 02:54:08,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:54:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:54:08,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:54:08,682 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_973 (Array Int Int))) (= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_973) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))))) is different from false [2023-08-31 02:54:08,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:54:08,721 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 54 treesize of output 38 [2023-08-31 02:54:08,725 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 17 treesize of output 11 [2023-08-31 02:54:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-31 02:54:08,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940260085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:54:08,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:54:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-31 02:54:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251281232] [2023-08-31 02:54:08,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:54:08,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:54:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:54:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:54:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=372, Unknown=2, NotChecked=40, Total=506 [2023-08-31 02:54:08,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-31 02:54:08,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 5295 transitions, 167148 flow. Second operand has 23 states, 23 states have (on average 97.17391304347827) internal successors, (2235), 23 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states 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 02:54:08,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:54:08,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-31 02:54:08,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:55:47,562 INFO L130 PetriNetUnfolder]: 42324/64214 cut-off events. [2023-08-31 02:55:47,562 INFO L131 PetriNetUnfolder]: For 3020607/3023471 co-relation queries the response was YES. [2023-08-31 02:55:50,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764757 conditions, 64214 events. 42324/64214 cut-off events. For 3020607/3023471 co-relation queries the response was YES. Maximal size of possible extension queue 3564. Compared 507139 event pairs, 10575 based on Foata normal form. 1407/64896 useless extension candidates. Maximal degree in co-relation 763900. Up to 59557 conditions per place. [2023-08-31 02:55:51,161 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 4533 selfloop transitions, 976 changer transitions 1/5608 dead transitions. [2023-08-31 02:55:51,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 5608 transitions, 186746 flow [2023-08-31 02:55:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 02:55:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 02:55:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1263 transitions. [2023-08-31 02:55:51,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841240875912409 [2023-08-31 02:55:51,163 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1263 transitions. [2023-08-31 02:55:51,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1263 transitions. [2023-08-31 02:55:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:55:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1263 transitions. [2023-08-31 02:55:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.25) internal successors, (1263), 12 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 02:55:51,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 02:55:51,168 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 02:55:51,168 INFO L175 Difference]: Start difference. First operand has 530 places, 5295 transitions, 167148 flow. Second operand 12 states and 1263 transitions. [2023-08-31 02:55:51,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 5608 transitions, 186746 flow Killed by 15