./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.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-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:06:10,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:06:10,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:06:10,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:06:10,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:06:10,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:06:10,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:06:10,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:06:10,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:06:10,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:06:10,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:06:10,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:06:10,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:06:10,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:06:10,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:06:10,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:06:10,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:06:10,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:06:10,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:06:10,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:06:10,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:06:10,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:06:10,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:06:10,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:06:10,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:06:10,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:06:10,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:06:10,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:06:10,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:06:10,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:06:10,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:06:10,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:06:10,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:06:10,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:06:10,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:06:10,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:06:10,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:06:10,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:06:10,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:06:10,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:06:10,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:06:10,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:06:10,308 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:06:10,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:06:10,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:06:10,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:06:10,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:06:10,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:06:10,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:06:10,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:06:10,311 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:06:10,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:06:10,312 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:06:10,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:06:10,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:06:10,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:06:10,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:06:10,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:06:10,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:06:10,314 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:06:10,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:06:10,314 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:06:10,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:06:10,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:06:10,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:06:10,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:06:10,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:06:10,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:06:10,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:06:10,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:06:10,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:06:10,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:06:10,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:06:10,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:06:10,317 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:06:10,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:06:10,317 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:06:10,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:06:10,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:06:10,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:06:10,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:06:10,654 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:06:10,654 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:06:10,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-31 03:06:11,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:06:11,960 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:06:11,961 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-31 03:06:11,971 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8836800/42b13a779b594a1c9406a5a8cd828b3b/FLAG0addc30cd [2023-08-31 03:06:11,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8836800/42b13a779b594a1c9406a5a8cd828b3b [2023-08-31 03:06:11,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:06:11,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:06:11,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:06:11,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:06:11,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:06:11,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:06:11" (1/1) ... [2023-08-31 03:06:11,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea9cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:11, skipping insertion in model container [2023-08-31 03:06:11,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:06:11" (1/1) ... [2023-08-31 03:06:12,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:06:12,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:06:12,158 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-31 03:06:12,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:06:12,186 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:06:12,222 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-31 03:06:12,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:06:12,237 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:06:12,238 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:06:12,243 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:06:12,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12 WrapperNode [2023-08-31 03:06:12,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:06:12,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:06:12,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:06:12,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:06:12,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,305 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-08-31 03:06:12,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:06:12,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:06:12,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:06:12,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:06:12,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:06:12,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:06:12,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:06:12,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:06:12,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (1/1) ... [2023-08-31 03:06:12,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:06:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:12,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:06:12,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:06:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:06:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:06:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:06:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:06:12,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:06:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:06:12,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:06:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:06:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:06:12,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:06:12,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:06:12,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:06:12,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:06:12,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:06:12,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:06:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:06:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:06:12,413 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:06:12,570 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:06:12,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:06:12,803 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:06:12,856 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:06:12,856 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 03:06:12,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:06:12 BoogieIcfgContainer [2023-08-31 03:06:12,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:06:12,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:06:12,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:06:12,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:06:12,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:06:11" (1/3) ... [2023-08-31 03:06:12,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b887d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:06:12, skipping insertion in model container [2023-08-31 03:06:12,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:06:12" (2/3) ... [2023-08-31 03:06:12,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b887d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:06:12, skipping insertion in model container [2023-08-31 03:06:12,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:06:12" (3/3) ... [2023-08-31 03:06:12,866 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-08-31 03:06:12,872 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:06:12,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:06:12,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:06:12,880 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:06:12,968 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 03:06:13,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 314 flow [2023-08-31 03:06:13,133 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2023-08-31 03:06:13,133 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:06:13,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-08-31 03:06:13,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 145 transitions, 314 flow [2023-08-31 03:06:13,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 132 transitions, 282 flow [2023-08-31 03:06:13,152 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:06:13,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 132 transitions, 282 flow [2023-08-31 03:06:13,162 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 132 transitions, 282 flow [2023-08-31 03:06:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 132 transitions, 282 flow [2023-08-31 03:06:13,206 INFO L130 PetriNetUnfolder]: 12/132 cut-off events. [2023-08-31 03:06:13,207 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:06:13,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 132 events. 12/132 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-08-31 03:06:13,209 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-31 03:06:17,824 INFO L134 LiptonReduction]: Checked pairs total: 1523 [2023-08-31 03:06:17,824 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-31 03:06:17,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:06:17,851 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;@1271c3fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:06:17,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 03:06:17,871 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-31 03:06:17,872 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:06:17,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:17,873 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 03:06:17,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:17,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash -924859563, now seen corresponding path program 1 times [2023-08-31 03:06:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:17,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557720529] [2023-08-31 03:06:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557720529] [2023-08-31 03:06:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557720529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:06:18,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:06:18,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:06:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564312754] [2023-08-31 03:06:18,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:06:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:06:18,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:06:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:06:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 267 [2023-08-31 03:06:18,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:18,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:06:18,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 267 [2023-08-31 03:06:18,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:06:18,844 INFO L130 PetriNetUnfolder]: 269/376 cut-off events. [2023-08-31 03:06:18,845 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-31 03:06:18,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 376 events. 269/376 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1112 event pairs, 117 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 593. Up to 367 conditions per place. [2023-08-31 03:06:18,851 INFO L137 encePairwiseOnDemand]: 264/267 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-31 03:06:18,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2023-08-31 03:06:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:06:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:06:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-31 03:06:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48564294631710364 [2023-08-31 03:06:18,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-31 03:06:18,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-31 03:06:18,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:06:18,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-31 03:06:18,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:06:18,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:18,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:18,889 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 389 transitions. [2023-08-31 03:06:18,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2023-08-31 03:06:18,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 03:06:18,897 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-08-31 03:06:18,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-08-31 03:06:18,901 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-31 03:06:18,902 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-08-31 03:06:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:18,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:18,906 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 03:06:18,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:06:18,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:18,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash 313336442, now seen corresponding path program 1 times [2023-08-31 03:06:18,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213683418] [2023-08-31 03:06:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:19,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:19,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213683418] [2023-08-31 03:06:19,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213683418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:19,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949371554] [2023-08-31 03:06:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:19,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:06:19,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:06:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:06:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:06:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:19,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:06:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949371554] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:19,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:06:19,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-31 03:06:19,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632970497] [2023-08-31 03:06:19,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:06:19,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:06:19,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:06:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:06:19,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2023-08-31 03:06:19,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:19,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:06:19,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2023-08-31 03:06:19,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:06:19,473 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2023-08-31 03:06:19,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 03:06:19,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1394 event pairs, 49 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2023-08-31 03:06:19,476 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-08-31 03:06:19,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2023-08-31 03:06:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:06:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:06:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-08-31 03:06:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45617977528089887 [2023-08-31 03:06:19,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-08-31 03:06:19,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-08-31 03:06:19,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:06:19,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-08-31 03:06:19,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:19,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:19,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:19,485 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 609 transitions. [2023-08-31 03:06:19,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2023-08-31 03:06:19,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:06:19,486 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2023-08-31 03:06:19,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-31 03:06:19,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-08-31 03:06:19,487 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2023-08-31 03:06:19,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:19,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:19,488 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 03:06:19,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:06:19,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:19,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:19,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1604052521, now seen corresponding path program 1 times [2023-08-31 03:06:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:19,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009429498] [2023-08-31 03:06:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:19,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:19,835 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 03:06:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:19,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009429498] [2023-08-31 03:06:19,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009429498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:19,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118121564] [2023-08-31 03:06:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:19,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:19,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:19,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:06:19,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:06:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:06:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:06:20,043 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 03:06:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:06:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:06:20,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118121564] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:20,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:06:20,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-31 03:06:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107026297] [2023-08-31 03:06:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:06:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 03:06:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 03:06:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:06:20,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:06:20,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:20,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:06:20,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:06:20,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:06:20,388 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2023-08-31 03:06:20,388 INFO L131 PetriNetUnfolder]: For 108/152 co-relation queries the response was YES. [2023-08-31 03:06:20,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 108/152 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1976 event pairs, 138 based on Foata normal form. 44/483 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2023-08-31 03:06:20,392 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-08-31 03:06:20,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2023-08-31 03:06:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 03:06:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 03:06:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 821 transitions. [2023-08-31 03:06:20,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927233814874267 [2023-08-31 03:06:20,396 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 821 transitions. [2023-08-31 03:06:20,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 821 transitions. [2023-08-31 03:06:20,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:06:20,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 821 transitions. [2023-08-31 03:06:20,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:20,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:20,402 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:20,403 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 821 transitions. [2023-08-31 03:06:20,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2023-08-31 03:06:20,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 03:06:20,405 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2023-08-31 03:06:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-31 03:06:20,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-31 03:06:20,406 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2023-08-31 03:06:20,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:20,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:20,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:06:20,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:06:20,613 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,SelfDestructingSolverStorable2 [2023-08-31 03:06:20,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:20,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1189152529, now seen corresponding path program 2 times [2023-08-31 03:06:20,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:20,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630780305] [2023-08-31 03:06:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:20,729 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 03:06:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630780305] [2023-08-31 03:06:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630780305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845879661] [2023-08-31 03:06:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:06:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:20,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:06:20,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:06:20,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 03:06:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:06:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 03:06:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:06:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:06:20,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:06:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845879661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:06:20,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:06:20,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-08-31 03:06:20,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854254755] [2023-08-31 03:06:20,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:06:20,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:06:20,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:06:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:06:20,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 267 [2023-08-31 03:06:20,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:20,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:06:20,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 267 [2023-08-31 03:06:20,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:06:21,062 INFO L130 PetriNetUnfolder]: 312/464 cut-off events. [2023-08-31 03:06:21,063 INFO L131 PetriNetUnfolder]: For 218/247 co-relation queries the response was YES. [2023-08-31 03:06:21,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 464 events. 312/464 cut-off events. For 218/247 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1477 event pairs, 119 based on Foata normal form. 55/416 useless extension candidates. Maximal degree in co-relation 1317. Up to 330 conditions per place. [2023-08-31 03:06:21,067 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-08-31 03:06:21,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2023-08-31 03:06:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:06:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:06:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-08-31 03:06:21,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47659176029962547 [2023-08-31 03:06:21,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-08-31 03:06:21,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-08-31 03:06:21,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:06:21,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-08-31 03:06:21,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:21,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:21,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:21,074 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 509 transitions. [2023-08-31 03:06:21,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2023-08-31 03:06:21,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 03:06:21,078 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2023-08-31 03:06:21,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-31 03:06:21,079 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-08-31 03:06:21,079 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2023-08-31 03:06:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:21,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:21,080 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 03:06:21,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:06:21,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:21,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:21,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1697474197, now seen corresponding path program 1 times [2023-08-31 03:06:21,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:21,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056926374] [2023-08-31 03:06:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:21,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056926374] [2023-08-31 03:06:22,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056926374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403693931] [2023-08-31 03:06:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:22,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:22,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:06:22,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:06:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 03:06:22,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:06:22,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:06:22,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:06:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:06:23,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-31 03:06:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:06:23,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-31 03:06:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:06:23,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:23,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-31 03:06:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:23,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:06:23,962 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~max1~0 c_~max2~0)) (.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (forall ((v_ArrVal_201 (Array Int Int))) (< c_~max3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (and (or .cse1 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0)))) (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse2) (<= .cse2 c_~max3~0) (<= .cse2 c_~max2~0)))) (or .cse1 (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (or (<= .cse3 c_~max3~0) (< c_~max2~0 .cse3))))))) is different from false [2023-08-31 03:06:24,041 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~max1~0 c_~max2~0)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or .cse0 (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2))) (or (< c_~max2~0 .cse1) (<= .cse1 c_~max3~0))))) (or (and (or .cse0 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (< c_~max3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2)))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2))) (or (= c_~max1~0 .cse3) (<= .cse3 c_~max2~0) (<= .cse3 c_~max3~0)))))) is different from false [2023-08-31 03:06:49,559 WARN L222 SmtUtils]: Spent 24.35s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:06:49,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:49,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-08-31 03:06:49,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:49,745 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 319 treesize of output 307 [2023-08-31 03:06:49,761 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 136 treesize of output 112 [2023-08-31 03:06:49,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:49,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 63 [2023-08-31 03:06:49,786 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 46 [2023-08-31 03:06:50,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:50,034 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 109 treesize of output 73 [2023-08-31 03:06:50,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:50,046 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 329 treesize of output 313 [2023-08-31 03:06:50,060 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 271 treesize of output 223 [2023-08-31 03:06:50,077 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 223 treesize of output 199 [2023-08-31 03:06:50,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:50,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 115 [2023-08-31 03:06:50,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:50,966 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 77 treesize of output 53 [2023-08-31 03:06:50,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:50,981 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 340 treesize of output 324 [2023-08-31 03:06:51,001 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 136 treesize of output 112 [2023-08-31 03:06:51,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:51,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 70 [2023-08-31 03:06:51,029 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 46 [2023-08-31 03:06:51,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:51,243 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 77 treesize of output 53 [2023-08-31 03:06:51,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:51,263 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 1264 treesize of output 1200 [2023-08-31 03:06:51,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:51,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 82 [2023-08-31 03:06:51,306 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 59 treesize of output 47 [2023-08-31 03:06:51,318 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 70 treesize of output 46 [2023-08-31 03:06:51,455 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 03:06:51,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 1 [2023-08-31 03:06:51,466 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 03:06:51,466 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 119 treesize of output 1 [2023-08-31 03:06:51,475 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 03:06:51,476 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 138 treesize of output 1 [2023-08-31 03:06:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:51,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403693931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:06:51,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:06:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-31 03:06:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045732] [2023-08-31 03:06:51,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:06:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 03:06:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 03:06:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=633, Unknown=4, NotChecked=106, Total=870 [2023-08-31 03:06:51,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 267 [2023-08-31 03:06:51,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 30 states, 30 states have (on average 74.2) internal successors, (2226), 30 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:51,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:06:51,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 267 [2023-08-31 03:06:51,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:06:53,399 INFO L130 PetriNetUnfolder]: 804/1177 cut-off events. [2023-08-31 03:06:53,400 INFO L131 PetriNetUnfolder]: For 1181/1194 co-relation queries the response was YES. [2023-08-31 03:06:53,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 1177 events. 804/1177 cut-off events. For 1181/1194 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4687 event pairs, 60 based on Foata normal form. 14/950 useless extension candidates. Maximal degree in co-relation 2861. Up to 722 conditions per place. [2023-08-31 03:06:53,407 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 84 selfloop transitions, 51 changer transitions 1/138 dead transitions. [2023-08-31 03:06:53,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 138 transitions, 825 flow [2023-08-31 03:06:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 03:06:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 03:06:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 899 transitions. [2023-08-31 03:06:53,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30609465440926115 [2023-08-31 03:06:53,411 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 899 transitions. [2023-08-31 03:06:53,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 899 transitions. [2023-08-31 03:06:53,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:06:53,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 899 transitions. [2023-08-31 03:06:53,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 81.72727272727273) internal successors, (899), 11 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:53,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:53,418 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:53,418 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 11 states and 899 transitions. [2023-08-31 03:06:53,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 138 transitions, 825 flow [2023-08-31 03:06:53,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 138 transitions, 749 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-31 03:06:53,425 INFO L231 Difference]: Finished difference. Result has 50 places, 81 transitions, 482 flow [2023-08-31 03:06:53,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=482, PETRI_PLACES=50, PETRI_TRANSITIONS=81} [2023-08-31 03:06:53,426 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-31 03:06:53,426 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 81 transitions, 482 flow [2023-08-31 03:06:53,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 74.2) internal successors, (2226), 30 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:53,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:53,427 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 03:06:53,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:06:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:53,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:53,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1093688525, now seen corresponding path program 2 times [2023-08-31 03:06:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:53,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413250814] [2023-08-31 03:06:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:54,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:54,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413250814] [2023-08-31 03:06:54,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413250814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:54,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113017711] [2023-08-31 03:06:54,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:06:54,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:54,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:54,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:06:54,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:06:54,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:06:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:06:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:06:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:06:54,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:06:54,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:54,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-31 03:06:54,963 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 03:06:54,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:06:55,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:55,257 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 125 treesize of output 69 [2023-08-31 03:06:55,675 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 03:06:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113017711] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:06:55,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:06:55,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-31 03:06:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162392716] [2023-08-31 03:06:55,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:06:55,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:06:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:06:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:06:56,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 267 [2023-08-31 03:06:56,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 81 transitions, 482 flow. Second operand has 27 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:56,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:06:56,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 267 [2023-08-31 03:06:56,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:06:57,468 INFO L130 PetriNetUnfolder]: 1054/1547 cut-off events. [2023-08-31 03:06:57,469 INFO L131 PetriNetUnfolder]: For 2446/2446 co-relation queries the response was YES. [2023-08-31 03:06:57,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1547 events. 1054/1547 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5886 event pairs, 142 based on Foata normal form. 1/1547 useless extension candidates. Maximal degree in co-relation 5301. Up to 1191 conditions per place. [2023-08-31 03:06:57,480 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 99 selfloop transitions, 58 changer transitions 1/158 dead transitions. [2023-08-31 03:06:57,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 158 transitions, 1202 flow [2023-08-31 03:06:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 03:06:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 03:06:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1226 transitions. [2023-08-31 03:06:57,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38264669163545567 [2023-08-31 03:06:57,484 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1226 transitions. [2023-08-31 03:06:57,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1226 transitions. [2023-08-31 03:06:57,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:06:57,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1226 transitions. [2023-08-31 03:06:57,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.16666666666667) internal successors, (1226), 12 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:57,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:57,494 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:57,494 INFO L175 Difference]: Start difference. First operand has 50 places, 81 transitions, 482 flow. Second operand 12 states and 1226 transitions. [2023-08-31 03:06:57,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 158 transitions, 1202 flow [2023-08-31 03:06:57,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 158 transitions, 1180 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-31 03:06:57,503 INFO L231 Difference]: Finished difference. Result has 67 places, 118 transitions, 900 flow [2023-08-31 03:06:57,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=900, PETRI_PLACES=67, PETRI_TRANSITIONS=118} [2023-08-31 03:06:57,506 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-08-31 03:06:57,506 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 118 transitions, 900 flow [2023-08-31 03:06:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:06:57,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:06:57,507 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 03:06:57,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:06:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:57,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:06:57,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:06:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1787047017, now seen corresponding path program 3 times [2023-08-31 03:06:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:06:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973362868] [2023-08-31 03:06:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:06:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:06:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:06:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:58,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:06:58,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973362868] [2023-08-31 03:06:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973362868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:06:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079716828] [2023-08-31 03:06:58,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:06:58,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:06:58,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:06:58,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:06:58,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:06:58,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:06:58,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:06:58,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 03:06:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:06:58,747 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:06:58,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:58,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-31 03:06:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:06:59,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:06:59,019 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 125 treesize of output 69 [2023-08-31 03:06:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:06:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079716828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:06:59,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:06:59,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2023-08-31 03:06:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660864102] [2023-08-31 03:06:59,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:06:59,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:06:59,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:06:59,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:06:59,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:07:00,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 267 [2023-08-31 03:07:00,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 118 transitions, 900 flow. Second operand has 24 states, 24 states have (on average 102.5) internal successors, (2460), 24 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:00,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:00,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 267 [2023-08-31 03:07:00,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:01,180 INFO L130 PetriNetUnfolder]: 1157/1702 cut-off events. [2023-08-31 03:07:01,180 INFO L131 PetriNetUnfolder]: For 4740/4851 co-relation queries the response was YES. [2023-08-31 03:07:01,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7800 conditions, 1702 events. 1157/1702 cut-off events. For 4740/4851 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7076 event pairs, 161 based on Foata normal form. 25/1698 useless extension candidates. Maximal degree in co-relation 7265. Up to 1316 conditions per place. [2023-08-31 03:07:01,194 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 120 selfloop transitions, 71 changer transitions 1/196 dead transitions. [2023-08-31 03:07:01,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 196 transitions, 1779 flow [2023-08-31 03:07:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 03:07:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 03:07:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1087 transitions. [2023-08-31 03:07:01,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40711610486891386 [2023-08-31 03:07:01,198 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1087 transitions. [2023-08-31 03:07:01,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1087 transitions. [2023-08-31 03:07:01,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:01,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1087 transitions. [2023-08-31 03:07:01,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:01,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:01,204 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:01,205 INFO L175 Difference]: Start difference. First operand has 67 places, 118 transitions, 900 flow. Second operand 10 states and 1087 transitions. [2023-08-31 03:07:01,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 196 transitions, 1779 flow [2023-08-31 03:07:01,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 196 transitions, 1751 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-31 03:07:01,221 INFO L231 Difference]: Finished difference. Result has 78 places, 145 transitions, 1318 flow [2023-08-31 03:07:01,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1318, PETRI_PLACES=78, PETRI_TRANSITIONS=145} [2023-08-31 03:07:01,222 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2023-08-31 03:07:01,222 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 145 transitions, 1318 flow [2023-08-31 03:07:01,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.5) internal successors, (2460), 24 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:01,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:01,224 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 03:07:01,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:01,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:01,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:01,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash 374391591, now seen corresponding path program 4 times [2023-08-31 03:07:01,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:01,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983226675] [2023-08-31 03:07:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:01,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983226675] [2023-08-31 03:07:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983226675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297298212] [2023-08-31 03:07:02,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:07:02,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:02,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:02,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:07:02,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:07:02,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 03:07:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:02,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:02,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2023-08-31 03:07:02,620 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 03:07:02,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:02,950 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:02,950 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 125 treesize of output 65 [2023-08-31 03:07:03,124 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 03:07:03,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297298212] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:03,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-31 03:07:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206467012] [2023-08-31 03:07:03,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:03,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:07:03,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:07:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:07:03,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 267 [2023-08-31 03:07:03,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 145 transitions, 1318 flow. Second operand has 22 states, 22 states have (on average 104.72727272727273) internal successors, (2304), 22 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:03,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:03,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 267 [2023-08-31 03:07:03,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:04,592 INFO L130 PetriNetUnfolder]: 1934/2871 cut-off events. [2023-08-31 03:07:04,592 INFO L131 PetriNetUnfolder]: For 10604/10867 co-relation queries the response was YES. [2023-08-31 03:07:04,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13617 conditions, 2871 events. 1934/2871 cut-off events. For 10604/10867 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13626 event pairs, 152 based on Foata normal form. 82/2907 useless extension candidates. Maximal degree in co-relation 12487. Up to 1313 conditions per place. [2023-08-31 03:07:04,620 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 154 selfloop transitions, 180 changer transitions 7/345 dead transitions. [2023-08-31 03:07:04,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 345 transitions, 3275 flow [2023-08-31 03:07:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:07:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:07:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1906 transitions. [2023-08-31 03:07:04,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41991628111918927 [2023-08-31 03:07:04,632 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1906 transitions. [2023-08-31 03:07:04,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1906 transitions. [2023-08-31 03:07:04,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:04,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1906 transitions. [2023-08-31 03:07:04,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.11764705882354) internal successors, (1906), 17 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:04,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:04,651 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:04,651 INFO L175 Difference]: Start difference. First operand has 78 places, 145 transitions, 1318 flow. Second operand 17 states and 1906 transitions. [2023-08-31 03:07:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 345 transitions, 3275 flow [2023-08-31 03:07:04,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 345 transitions, 3144 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-31 03:07:04,693 INFO L231 Difference]: Finished difference. Result has 97 places, 242 transitions, 2560 flow [2023-08-31 03:07:04,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2560, PETRI_PLACES=97, PETRI_TRANSITIONS=242} [2023-08-31 03:07:04,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-08-31 03:07:04,694 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 242 transitions, 2560 flow [2023-08-31 03:07:04,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 104.72727272727273) internal successors, (2304), 22 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:04,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:04,695 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 03:07:04,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:04,902 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:04,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1063576487, now seen corresponding path program 5 times [2023-08-31 03:07:04,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:04,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717857220] [2023-08-31 03:07:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:04,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:05,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:05,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717857220] [2023-08-31 03:07:05,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717857220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:05,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494095690] [2023-08-31 03:07:05,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:07:05,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:05,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:05,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:07:05,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:07:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 03:07:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:06,178 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 57 treesize of output 37 [2023-08-31 03:07:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:06,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:06,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:06,418 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 117 treesize of output 69 [2023-08-31 03:07:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494095690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:06,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:06,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2023-08-31 03:07:06,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602577163] [2023-08-31 03:07:06,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:06,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:07:06,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:07:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:07:08,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-08-31 03:07:08,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 242 transitions, 2560 flow. Second operand has 27 states, 27 states have (on average 91.55555555555556) internal successors, (2472), 27 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:08,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:08,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-08-31 03:07:08,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:10,945 INFO L130 PetriNetUnfolder]: 2688/4018 cut-off events. [2023-08-31 03:07:10,946 INFO L131 PetriNetUnfolder]: For 22948/22948 co-relation queries the response was YES. [2023-08-31 03:07:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 4018 events. 2688/4018 cut-off events. For 22948/22948 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19339 event pairs, 339 based on Foata normal form. 27/4045 useless extension candidates. Maximal degree in co-relation 21951. Up to 2697 conditions per place. [2023-08-31 03:07:10,975 INFO L137 encePairwiseOnDemand]: 254/267 looper letters, 282 selfloop transitions, 196 changer transitions 12/490 dead transitions. [2023-08-31 03:07:10,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 490 transitions, 5541 flow [2023-08-31 03:07:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:07:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:07:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3571 transitions. [2023-08-31 03:07:10,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147383338394573 [2023-08-31 03:07:10,986 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3571 transitions. [2023-08-31 03:07:10,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3571 transitions. [2023-08-31 03:07:10,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:10,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3571 transitions. [2023-08-31 03:07:10,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.51351351351352) internal successors, (3571), 37 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:11,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:11,008 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:11,008 INFO L175 Difference]: Start difference. First operand has 97 places, 242 transitions, 2560 flow. Second operand 37 states and 3571 transitions. [2023-08-31 03:07:11,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 490 transitions, 5541 flow [2023-08-31 03:07:11,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 490 transitions, 5195 flow, removed 132 selfloop flow, removed 5 redundant places. [2023-08-31 03:07:11,102 INFO L231 Difference]: Finished difference. Result has 147 places, 339 transitions, 3919 flow [2023-08-31 03:07:11,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3919, PETRI_PLACES=147, PETRI_TRANSITIONS=339} [2023-08-31 03:07:11,103 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2023-08-31 03:07:11,103 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 339 transitions, 3919 flow [2023-08-31 03:07:11,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.55555555555556) internal successors, (2472), 27 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:11,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:11,105 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 03:07:11,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 03:07:11,311 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,SelfDestructingSolverStorable8 [2023-08-31 03:07:11,311 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:11,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1819272483, now seen corresponding path program 6 times [2023-08-31 03:07:11,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:11,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767970580] [2023-08-31 03:07:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:11,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767970580] [2023-08-31 03:07:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767970580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687787284] [2023-08-31 03:07:11,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:07:11,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:11,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:07:12,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:07:12,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:07:12,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:12,354 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 51 treesize of output 31 [2023-08-31 03:07:12,439 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 03:07:12,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:12,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:12,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 69 [2023-08-31 03:07:12,952 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 03:07:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687787284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:12,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:12,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-31 03:07:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388214499] [2023-08-31 03:07:12,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:12,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:07:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:07:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:07:13,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 267 [2023-08-31 03:07:13,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 339 transitions, 3919 flow. Second operand has 24 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:13,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:13,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 267 [2023-08-31 03:07:13,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:15,130 INFO L130 PetriNetUnfolder]: 2884/4316 cut-off events. [2023-08-31 03:07:15,131 INFO L131 PetriNetUnfolder]: For 35838/35838 co-relation queries the response was YES. [2023-08-31 03:07:15,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26977 conditions, 4316 events. 2884/4316 cut-off events. For 35838/35838 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21266 event pairs, 600 based on Foata normal form. 2/4318 useless extension candidates. Maximal degree in co-relation 26710. Up to 3788 conditions per place. [2023-08-31 03:07:15,173 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 292 selfloop transitions, 142 changer transitions 1/435 dead transitions. [2023-08-31 03:07:15,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 435 transitions, 5843 flow [2023-08-31 03:07:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:07:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:07:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1883 transitions. [2023-08-31 03:07:15,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918019142738244 [2023-08-31 03:07:15,178 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1883 transitions. [2023-08-31 03:07:15,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1883 transitions. [2023-08-31 03:07:15,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:15,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1883 transitions. [2023-08-31 03:07:15,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.61111111111111) internal successors, (1883), 18 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:15,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:15,189 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:15,189 INFO L175 Difference]: Start difference. First operand has 147 places, 339 transitions, 3919 flow. Second operand 18 states and 1883 transitions. [2023-08-31 03:07:15,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 435 transitions, 5843 flow [2023-08-31 03:07:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 435 transitions, 5438 flow, removed 166 selfloop flow, removed 7 redundant places. [2023-08-31 03:07:15,371 INFO L231 Difference]: Finished difference. Result has 162 places, 386 transitions, 4563 flow [2023-08-31 03:07:15,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4563, PETRI_PLACES=162, PETRI_TRANSITIONS=386} [2023-08-31 03:07:15,373 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-08-31 03:07:15,373 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 386 transitions, 4563 flow [2023-08-31 03:07:15,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:15,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:15,374 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 03:07:15,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:15,581 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,SelfDestructingSolverStorable9 [2023-08-31 03:07:15,582 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:15,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash 9615099, now seen corresponding path program 7 times [2023-08-31 03:07:15,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:15,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500677402] [2023-08-31 03:07:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:15,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:16,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500677402] [2023-08-31 03:07:16,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500677402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:16,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836529733] [2023-08-31 03:07:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:07:16,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:16,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:16,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:07:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:16,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 03:07:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:16,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:07:16,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:07:16,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:07:16,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:07:16,761 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-31 03:07:16,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-08-31 03:07:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:16,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:17,834 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (< c_~max2~0 c_~max3~0)) (.cse4 (<= c_~max3~0 c_~max2~0)) (.cse10 (= c_~max1~0 c_~max2~0)) (.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse3)) (.cse1 (select .cse2 c_~A~0.offset))) (or (<= .cse0 c_~max2~0) (<= .cse0 c_~max3~0) (= .cse0 .cse1) (<= .cse1 c_~max1~0))))) (or .cse4 (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse6 (select .cse5 c_~A~0.offset))) (or (< c_~max3~0 (select .cse5 .cse3)) (= .cse6 c_~max3~0) (<= .cse6 c_~max1~0)))))) (or (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse8 (select .cse7 c_~A~0.offset))) (or (< c_~max3~0 (select .cse7 .cse3)) (<= .cse8 c_~max1~0) (= .cse8 c_~max2~0))))) .cse9) (or (and (or .cse10 .cse9) (or (= c_~max1~0 c_~max3~0) .cse4)) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (or (< c_~max3~0 (select .cse11 .cse3)) (< c_~max1~0 (select .cse11 c_~A~0.offset)))))) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse12 (select .cse14 .cse3)) (.cse13 (select .cse14 c_~A~0.offset))) (or (<= .cse12 c_~max3~0) (< c_~max2~0 .cse12) (<= .cse13 c_~max1~0) (= .cse13 c_~max2~0))))) (or (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse15 (select .cse16 .cse3))) (or (<= .cse15 c_~max3~0) (< c_~max1~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 .cse15))))) .cse10) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse17 (select .cse18 .cse3))) (or (<= .cse17 c_~max2~0) (<= .cse17 c_~max3~0) (< c_~max1~0 (select .cse18 c_~A~0.offset)) (= c_~max1~0 .cse17))))))) is different from false [2023-08-31 03:07:18,010 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (= c_~max1~0 c_~max2~0)) (.cse12 (<= c_~max3~0 c_~max2~0)) (.cse15 (< c_~max2~0 c_~max3~0)) (.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse3)) (.cse1 (select .cse2 c_~A~0.offset))) (or (< c_~max2~0 .cse0) (<= .cse0 c_~max3~0) (= .cse1 c_~max2~0) (<= .cse1 c_~max1~0))))) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse4 (select .cse6 .cse3)) (.cse5 (select .cse6 c_~A~0.offset))) (or (= .cse4 .cse5) (<= .cse4 c_~max3~0) (<= .cse4 c_~max2~0) (<= .cse5 c_~max1~0))))) (or (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse3))) (or (< c_~max1~0 (select .cse7 c_~A~0.offset)) (< c_~max2~0 .cse8) (<= .cse8 c_~max3~0))))) .cse9) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse10 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse11 (select .cse10 .cse3))) (or (< c_~max1~0 (select .cse10 c_~A~0.offset)) (= c_~max1~0 .cse11) (<= .cse11 c_~max3~0) (<= .cse11 c_~max2~0))))) (or .cse12 (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse14 (select .cse13 c_~A~0.offset))) (or (< c_~max3~0 (select .cse13 .cse3)) (= .cse14 c_~max3~0) (<= .cse14 c_~max1~0)))))) (or (and (or .cse9 .cse15) (or (= c_~max1~0 c_~max3~0) .cse12)) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (or (< c_~max3~0 (select .cse16 .cse3)) (< c_~max1~0 (select .cse16 c_~A~0.offset)))))) (or .cse15 (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse18 (select .cse17 c_~A~0.offset))) (or (< c_~max3~0 (select .cse17 .cse3)) (= .cse18 c_~max2~0) (<= .cse18 c_~max1~0)))))))) is different from false [2023-08-31 03:07:19,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:19,565 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 89 treesize of output 65 [2023-08-31 03:07:19,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:19,578 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 764 treesize of output 740 [2023-08-31 03:07:19,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:19,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 338 [2023-08-31 03:07:19,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:19,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 167 [2023-08-31 03:07:19,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:19,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 288 [2023-08-31 03:07:20,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:20,344 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 150 treesize of output 102 [2023-08-31 03:07:20,360 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:07:20,360 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 1161 treesize of output 1100 [2023-08-31 03:07:20,408 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:07:20,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 527 treesize of output 483 [2023-08-31 03:07:20,423 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:07:20,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 483 treesize of output 395 [2023-08-31 03:07:20,438 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:07:20,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 185 [2023-08-31 03:07:20,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:20,633 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 93 treesize of output 69 [2023-08-31 03:07:20,647 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:20,647 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 828 treesize of output 792 [2023-08-31 03:07:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:07:20,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 170 [2023-08-31 03:07:20,704 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:20,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 312 [2023-08-31 03:07:20,731 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:20,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 143 [2023-08-31 03:07:20,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:20,943 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 125 treesize of output 89 [2023-08-31 03:07:20,965 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:20,965 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 1125 treesize of output 1073 [2023-08-31 03:07:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:07:21,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 245 [2023-08-31 03:07:21,038 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:21,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 493 treesize of output 457 [2023-08-31 03:07:21,061 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:21,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 453 treesize of output 377 [2023-08-31 03:07:21,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:07:21,283 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 61 treesize of output 49 [2023-08-31 03:07:21,301 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:21,301 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 1083 treesize of output 1039 [2023-08-31 03:07:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:07:21,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2023-08-31 03:07:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:07:21,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2023-08-31 03:07:21,370 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:07:21,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 97 [2023-08-31 03:07:21,492 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 03:07:21,492 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 89 treesize of output 1 [2023-08-31 03:07:21,501 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 03:07:21,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 1 [2023-08-31 03:07:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836529733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:21,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:21,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-31 03:07:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063406287] [2023-08-31 03:07:21,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:07:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:07:21,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=588, Unknown=2, NotChecked=102, Total=812 [2023-08-31 03:07:21,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 267 [2023-08-31 03:07:21,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 386 transitions, 4563 flow. Second operand has 29 states, 29 states have (on average 71.17241379310344) internal successors, (2064), 29 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:21,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:21,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 267 [2023-08-31 03:07:21,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:24,393 INFO L130 PetriNetUnfolder]: 3197/4831 cut-off events. [2023-08-31 03:07:24,393 INFO L131 PetriNetUnfolder]: For 41164/41164 co-relation queries the response was YES. [2023-08-31 03:07:24,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 4831 events. 3197/4831 cut-off events. For 41164/41164 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24697 event pairs, 644 based on Foata normal form. 3/4834 useless extension candidates. Maximal degree in co-relation 30177. Up to 3787 conditions per place. [2023-08-31 03:07:24,426 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 325 selfloop transitions, 206 changer transitions 9/540 dead transitions. [2023-08-31 03:07:24,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 540 transitions, 7032 flow [2023-08-31 03:07:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 03:07:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 03:07:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1904 transitions. [2023-08-31 03:07:24,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2852434456928839 [2023-08-31 03:07:24,430 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1904 transitions. [2023-08-31 03:07:24,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1904 transitions. [2023-08-31 03:07:24,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:24,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1904 transitions. [2023-08-31 03:07:24,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:24,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 267.0) internal successors, (6942), 26 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:24,439 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 267.0) internal successors, (6942), 26 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:24,439 INFO L175 Difference]: Start difference. First operand has 162 places, 386 transitions, 4563 flow. Second operand 25 states and 1904 transitions. [2023-08-31 03:07:24,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 540 transitions, 7032 flow [2023-08-31 03:07:24,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 540 transitions, 6806 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-08-31 03:07:24,694 INFO L231 Difference]: Finished difference. Result has 189 places, 435 transitions, 5582 flow [2023-08-31 03:07:24,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5582, PETRI_PLACES=189, PETRI_TRANSITIONS=435} [2023-08-31 03:07:24,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2023-08-31 03:07:24,696 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 435 transitions, 5582 flow [2023-08-31 03:07:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 71.17241379310344) internal successors, (2064), 29 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:24,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:24,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:24,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:24,902 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,SelfDestructingSolverStorable10 [2023-08-31 03:07:24,903 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:24,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash -791178686, now seen corresponding path program 8 times [2023-08-31 03:07:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:24,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768585303] [2023-08-31 03:07:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:25,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:25,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768585303] [2023-08-31 03:07:25,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768585303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009606038] [2023-08-31 03:07:25,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:07:25,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:25,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:25,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:07:25,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:07:25,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:25,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:07:25,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:25,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:25,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009606038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:25,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:25,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-31 03:07:25,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891859875] [2023-08-31 03:07:25,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:07:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:07:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:07:25,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-31 03:07:25,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 435 transitions, 5582 flow. Second operand has 20 states, 20 states have (on average 107.6) internal successors, (2152), 20 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:25,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:25,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-31 03:07:25,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:26,995 INFO L130 PetriNetUnfolder]: 3692/5552 cut-off events. [2023-08-31 03:07:26,995 INFO L131 PetriNetUnfolder]: For 61132/61132 co-relation queries the response was YES. [2023-08-31 03:07:27,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38045 conditions, 5552 events. 3692/5552 cut-off events. For 61132/61132 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28827 event pairs, 1142 based on Foata normal form. 149/5701 useless extension candidates. Maximal degree in co-relation 37976. Up to 3722 conditions per place. [2023-08-31 03:07:27,041 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 469 selfloop transitions, 150 changer transitions 0/619 dead transitions. [2023-08-31 03:07:27,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 619 transitions, 9064 flow [2023-08-31 03:07:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:07:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:07:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2165 transitions. [2023-08-31 03:07:27,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426769170116302 [2023-08-31 03:07:27,045 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2165 transitions. [2023-08-31 03:07:27,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2165 transitions. [2023-08-31 03:07:27,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:27,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2165 transitions. [2023-08-31 03:07:27,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.94736842105263) internal successors, (2165), 19 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:27,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:27,053 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:27,053 INFO L175 Difference]: Start difference. First operand has 189 places, 435 transitions, 5582 flow. Second operand 19 states and 2165 transitions. [2023-08-31 03:07:27,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 619 transitions, 9064 flow [2023-08-31 03:07:27,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 619 transitions, 8734 flow, removed 91 selfloop flow, removed 14 redundant places. [2023-08-31 03:07:27,272 INFO L231 Difference]: Finished difference. Result has 202 places, 482 transitions, 6570 flow [2023-08-31 03:07:27,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6570, PETRI_PLACES=202, PETRI_TRANSITIONS=482} [2023-08-31 03:07:27,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-08-31 03:07:27,273 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 482 transitions, 6570 flow [2023-08-31 03:07:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.6) internal successors, (2152), 20 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:27,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:27,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:27,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 03:07:27,474 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,SelfDestructingSolverStorable11 [2023-08-31 03:07:27,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:27,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:27,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1356484867, now seen corresponding path program 1 times [2023-08-31 03:07:27,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:27,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516227274] [2023-08-31 03:07:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:27,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:27,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516227274] [2023-08-31 03:07:27,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516227274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:27,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263100555] [2023-08-31 03:07:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:27,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:27,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:27,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:07:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:27,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:07:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:27,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263100555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:27,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 03:07:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998274593] [2023-08-31 03:07:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:27,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:07:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:07:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:07:28,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:07:28,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 482 transitions, 6570 flow. Second operand has 16 states, 16 states have (on average 111.5) internal successors, (1784), 16 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:28,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:28,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:07:28,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:29,347 INFO L130 PetriNetUnfolder]: 3918/5943 cut-off events. [2023-08-31 03:07:29,348 INFO L131 PetriNetUnfolder]: For 111415/111472 co-relation queries the response was YES. [2023-08-31 03:07:29,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47348 conditions, 5943 events. 3918/5943 cut-off events. For 111415/111472 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32147 event pairs, 602 based on Foata normal form. 37/5972 useless extension candidates. Maximal degree in co-relation 47268. Up to 2063 conditions per place. [2023-08-31 03:07:29,409 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 565 selfloop transitions, 116 changer transitions 16/719 dead transitions. [2023-08-31 03:07:29,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 719 transitions, 10963 flow [2023-08-31 03:07:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 03:07:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 03:07:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1424 transitions. [2023-08-31 03:07:29,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-31 03:07:29,427 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1424 transitions. [2023-08-31 03:07:29,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1424 transitions. [2023-08-31 03:07:29,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:29,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1424 transitions. [2023-08-31 03:07:29,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 118.66666666666667) internal successors, (1424), 12 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:29,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:29,434 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:29,434 INFO L175 Difference]: Start difference. First operand has 202 places, 482 transitions, 6570 flow. Second operand 12 states and 1424 transitions. [2023-08-31 03:07:29,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 719 transitions, 10963 flow [2023-08-31 03:07:29,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 719 transitions, 10479 flow, removed 190 selfloop flow, removed 5 redundant places. [2023-08-31 03:07:29,913 INFO L231 Difference]: Finished difference. Result has 212 places, 506 transitions, 6902 flow [2023-08-31 03:07:29,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6902, PETRI_PLACES=212, PETRI_TRANSITIONS=506} [2023-08-31 03:07:29,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-08-31 03:07:29,914 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 506 transitions, 6902 flow [2023-08-31 03:07:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 111.5) internal successors, (1784), 16 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:29,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:29,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:29,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 03:07:30,115 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,SelfDestructingSolverStorable12 [2023-08-31 03:07:30,115 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:30,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2138929705, now seen corresponding path program 9 times [2023-08-31 03:07:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:30,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790786549] [2023-08-31 03:07:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790786549] [2023-08-31 03:07:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790786549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680958048] [2023-08-31 03:07:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:07:30,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:30,262 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:30,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:07:30,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:07:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:30,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:07:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:30,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:30,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680958048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:30,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:30,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 03:07:30,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240762403] [2023-08-31 03:07:30,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:07:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:07:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:07:30,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2023-08-31 03:07:30,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 506 transitions, 6902 flow. Second operand has 14 states, 14 states have (on average 115.85714285714286) internal successors, (1622), 14 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:30,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:30,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2023-08-31 03:07:30,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:31,639 INFO L130 PetriNetUnfolder]: 2958/4691 cut-off events. [2023-08-31 03:07:31,639 INFO L131 PetriNetUnfolder]: For 100043/100375 co-relation queries the response was YES. [2023-08-31 03:07:31,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 4691 events. 2958/4691 cut-off events. For 100043/100375 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26952 event pairs, 473 based on Foata normal form. 368/4997 useless extension candidates. Maximal degree in co-relation 39073. Up to 1783 conditions per place. [2023-08-31 03:07:31,684 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 399 selfloop transitions, 60 changer transitions 6/506 dead transitions. [2023-08-31 03:07:31,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 506 transitions, 8174 flow [2023-08-31 03:07:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:07:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:07:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 976 transitions. [2023-08-31 03:07:31,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45692883895131087 [2023-08-31 03:07:31,687 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 976 transitions. [2023-08-31 03:07:31,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 976 transitions. [2023-08-31 03:07:31,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:31,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 976 transitions. [2023-08-31 03:07:31,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:31,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:31,691 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:31,691 INFO L175 Difference]: Start difference. First operand has 212 places, 506 transitions, 6902 flow. Second operand 8 states and 976 transitions. [2023-08-31 03:07:31,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 506 transitions, 8174 flow [2023-08-31 03:07:32,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 506 transitions, 8079 flow, removed 45 selfloop flow, removed 11 redundant places. [2023-08-31 03:07:32,049 INFO L231 Difference]: Finished difference. Result has 200 places, 438 transitions, 6465 flow [2023-08-31 03:07:32,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6184, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6465, PETRI_PLACES=200, PETRI_TRANSITIONS=438} [2023-08-31 03:07:32,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-08-31 03:07:32,050 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 438 transitions, 6465 flow [2023-08-31 03:07:32,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.85714285714286) internal successors, (1622), 14 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:32,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:32,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:32,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:32,251 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,SelfDestructingSolverStorable13 [2023-08-31 03:07:32,251 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:07:32,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:32,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1906507639, now seen corresponding path program 2 times [2023-08-31 03:07:32,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:32,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667611005] [2023-08-31 03:07:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667611005] [2023-08-31 03:07:32,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667611005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093995125] [2023-08-31 03:07:32,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:07:32,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:32,357 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:32,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:07:32,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:07:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:07:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:07:32,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:07:32,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093995125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:32,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:32,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-31 03:07:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996080278] [2023-08-31 03:07:32,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:07:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:07:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:07:32,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:07:32,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 438 transitions, 6465 flow. Second operand has 16 states, 16 states have (on average 112.6875) internal successors, (1803), 16 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:32,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:32,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:07:32,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:33,793 INFO L130 PetriNetUnfolder]: 2974/4799 cut-off events. [2023-08-31 03:07:33,793 INFO L131 PetriNetUnfolder]: For 92869/92911 co-relation queries the response was YES. [2023-08-31 03:07:33,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37009 conditions, 4799 events. 2974/4799 cut-off events. For 92869/92911 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28189 event pairs, 267 based on Foata normal form. 374/5163 useless extension candidates. Maximal degree in co-relation 36933. Up to 1848 conditions per place. [2023-08-31 03:07:33,830 INFO L137 encePairwiseOnDemand]: 258/267 looper letters, 467 selfloop transitions, 65 changer transitions 20/572 dead transitions. [2023-08-31 03:07:33,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 572 transitions, 9052 flow [2023-08-31 03:07:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 03:07:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 03:07:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1415 transitions. [2023-08-31 03:07:33,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416354556803995 [2023-08-31 03:07:33,832 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1415 transitions. [2023-08-31 03:07:33,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1415 transitions. [2023-08-31 03:07:33,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:33,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1415 transitions. [2023-08-31 03:07:33,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.91666666666667) internal successors, (1415), 12 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:33,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:33,836 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:33,836 INFO L175 Difference]: Start difference. First operand has 200 places, 438 transitions, 6465 flow. Second operand 12 states and 1415 transitions. [2023-08-31 03:07:33,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 572 transitions, 9052 flow [2023-08-31 03:07:34,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 572 transitions, 8866 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-31 03:07:34,224 INFO L231 Difference]: Finished difference. Result has 205 places, 387 transitions, 5780 flow [2023-08-31 03:07:34,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5780, PETRI_PLACES=205, PETRI_TRANSITIONS=387} [2023-08-31 03:07:34,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2023-08-31 03:07:34,225 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 387 transitions, 5780 flow [2023-08-31 03:07:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.6875) internal successors, (1803), 16 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:34,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:34,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:34,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:34,429 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 03:07:34,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 267708470, now seen corresponding path program 10 times [2023-08-31 03:07:34,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:34,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527910247] [2023-08-31 03:07:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527910247] [2023-08-31 03:07:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527910247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296614545] [2023-08-31 03:07:34,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:07:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:34,521 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:07:34,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:07:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:07:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:34,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:34,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296614545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:34,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:34,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 18 [2023-08-31 03:07:34,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106343326] [2023-08-31 03:07:34,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:34,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:07:34,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:07:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:07:35,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-08-31 03:07:35,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 387 transitions, 5780 flow. Second operand has 18 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:35,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:35,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-08-31 03:07:35,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:36,631 INFO L130 PetriNetUnfolder]: 2676/4433 cut-off events. [2023-08-31 03:07:36,632 INFO L131 PetriNetUnfolder]: For 96592/96592 co-relation queries the response was YES. [2023-08-31 03:07:36,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37214 conditions, 4433 events. 2676/4433 cut-off events. For 96592/96592 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25616 event pairs, 472 based on Foata normal form. 234/4667 useless extension candidates. Maximal degree in co-relation 37139. Up to 1654 conditions per place. [2023-08-31 03:07:36,669 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 336 selfloop transitions, 151 changer transitions 147/634 dead transitions. [2023-08-31 03:07:36,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 634 transitions, 10670 flow [2023-08-31 03:07:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:07:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:07:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3757 transitions. [2023-08-31 03:07:36,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42639881965724663 [2023-08-31 03:07:36,674 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3757 transitions. [2023-08-31 03:07:36,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3757 transitions. [2023-08-31 03:07:36,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:36,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3757 transitions. [2023-08-31 03:07:36,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 113.84848484848484) internal successors, (3757), 33 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:36,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:36,688 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:36,689 INFO L175 Difference]: Start difference. First operand has 205 places, 387 transitions, 5780 flow. Second operand 33 states and 3757 transitions. [2023-08-31 03:07:36,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 634 transitions, 10670 flow [2023-08-31 03:07:37,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 634 transitions, 10118 flow, removed 146 selfloop flow, removed 12 redundant places. [2023-08-31 03:07:37,029 INFO L231 Difference]: Finished difference. Result has 240 places, 301 transitions, 5165 flow [2023-08-31 03:07:37,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5165, PETRI_PLACES=240, PETRI_TRANSITIONS=301} [2023-08-31 03:07:37,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2023-08-31 03:07:37,030 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 301 transitions, 5165 flow [2023-08-31 03:07:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:37,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:37,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:37,036 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 03:07:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 03:07:37,232 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 03:07:37,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash -421217089, now seen corresponding path program 11 times [2023-08-31 03:07:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263596424] [2023-08-31 03:07:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263596424] [2023-08-31 03:07:37,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263596424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836748645] [2023-08-31 03:07:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:07:37,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:37,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:37,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:07:37,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:07:37,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:37,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:07:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:37,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:37,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836748645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:37,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:37,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-31 03:07:37,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417851090] [2023-08-31 03:07:37,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:37,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:07:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:07:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:07:38,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-31 03:07:38,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 301 transitions, 5165 flow. Second operand has 21 states, 21 states have (on average 107.28571428571429) internal successors, (2253), 21 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:38,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:38,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-31 03:07:38,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:41,203 INFO L130 PetriNetUnfolder]: 3770/5799 cut-off events. [2023-08-31 03:07:41,203 INFO L131 PetriNetUnfolder]: For 169305/169305 co-relation queries the response was YES. [2023-08-31 03:07:41,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58170 conditions, 5799 events. 3770/5799 cut-off events. For 169305/169305 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31051 event pairs, 194 based on Foata normal form. 44/5843 useless extension candidates. Maximal degree in co-relation 58083. Up to 2106 conditions per place. [2023-08-31 03:07:41,260 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 514 selfloop transitions, 484 changer transitions 0/998 dead transitions. [2023-08-31 03:07:41,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 998 transitions, 18849 flow [2023-08-31 03:07:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-31 03:07:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-31 03:07:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 7601 transitions. [2023-08-31 03:07:41,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418649482264816 [2023-08-31 03:07:41,269 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 7601 transitions. [2023-08-31 03:07:41,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 7601 transitions. [2023-08-31 03:07:41,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 7601 transitions. [2023-08-31 03:07:41,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 111.77941176470588) internal successors, (7601), 68 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:41,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 267.0) internal successors, (18423), 69 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:41,292 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 267.0) internal successors, (18423), 69 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:41,292 INFO L175 Difference]: Start difference. First operand has 240 places, 301 transitions, 5165 flow. Second operand 68 states and 7601 transitions. [2023-08-31 03:07:41,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 998 transitions, 18849 flow [2023-08-31 03:07:41,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 998 transitions, 16228 flow, removed 1186 selfloop flow, removed 21 redundant places. [2023-08-31 03:07:42,009 INFO L231 Difference]: Finished difference. Result has 270 places, 615 transitions, 11397 flow [2023-08-31 03:07:42,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=11397, PETRI_PLACES=270, PETRI_TRANSITIONS=615} [2023-08-31 03:07:42,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2023-08-31 03:07:42,010 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 615 transitions, 11397 flow [2023-08-31 03:07:42,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.28571428571429) internal successors, (2253), 21 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:42,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:42,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:42,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:42,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:07:42,216 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 03:07:42,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1654813385, now seen corresponding path program 12 times [2023-08-31 03:07:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:42,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202778412] [2023-08-31 03:07:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:42,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202778412] [2023-08-31 03:07:42,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202778412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312733880] [2023-08-31 03:07:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:07:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:42,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:42,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:07:42,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:07:42,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:42,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:07:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:07:42,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312733880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:42,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:42,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-31 03:07:42,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798133681] [2023-08-31 03:07:42,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:42,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:07:42,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:07:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:07:43,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:07:43,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 615 transitions, 11397 flow. Second operand has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:43,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:43,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:07:43,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:44,476 INFO L130 PetriNetUnfolder]: 3756/5827 cut-off events. [2023-08-31 03:07:44,476 INFO L131 PetriNetUnfolder]: For 192034/192040 co-relation queries the response was YES. [2023-08-31 03:07:44,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59025 conditions, 5827 events. 3756/5827 cut-off events. For 192034/192040 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31757 event pairs, 588 based on Foata normal form. 58/5878 useless extension candidates. Maximal degree in co-relation 58929. Up to 2790 conditions per place. [2023-08-31 03:07:44,535 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 553 selfloop transitions, 176 changer transitions 0/765 dead transitions. [2023-08-31 03:07:44,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 765 transitions, 15928 flow [2023-08-31 03:07:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:07:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:07:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1049 transitions. [2023-08-31 03:07:44,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43653766125676235 [2023-08-31 03:07:44,538 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1049 transitions. [2023-08-31 03:07:44,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1049 transitions. [2023-08-31 03:07:44,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:44,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1049 transitions. [2023-08-31 03:07:44,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.55555555555556) internal successors, (1049), 9 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:44,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:44,541 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:44,541 INFO L175 Difference]: Start difference. First operand has 270 places, 615 transitions, 11397 flow. Second operand 9 states and 1049 transitions. [2023-08-31 03:07:44,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 765 transitions, 15928 flow [2023-08-31 03:07:45,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 765 transitions, 12716 flow, removed 1330 selfloop flow, removed 13 redundant places. [2023-08-31 03:07:45,465 INFO L231 Difference]: Finished difference. Result has 268 places, 652 transitions, 10006 flow [2023-08-31 03:07:45,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10006, PETRI_PLACES=268, PETRI_TRANSITIONS=652} [2023-08-31 03:07:45,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2023-08-31 03:07:45,466 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 652 transitions, 10006 flow [2023-08-31 03:07:45,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:45,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:45,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:45,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:45,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:07:45,667 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 03:07:45,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:45,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2126703127, now seen corresponding path program 13 times [2023-08-31 03:07:45,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:45,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598407505] [2023-08-31 03:07:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:45,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:45,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598407505] [2023-08-31 03:07:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598407505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:45,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371739387] [2023-08-31 03:07:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:07:45,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:45,795 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:45,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:07:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:07:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:45,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371739387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:46,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-31 03:07:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475669407] [2023-08-31 03:07:46,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:07:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:07:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:07:46,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:07:46,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 652 transitions, 10006 flow. Second operand has 21 states, 21 states have (on average 110.85714285714286) internal successors, (2328), 21 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:46,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:46,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:07:46,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:47,991 INFO L130 PetriNetUnfolder]: 3815/5935 cut-off events. [2023-08-31 03:07:47,991 INFO L131 PetriNetUnfolder]: For 162297/162301 co-relation queries the response was YES. [2023-08-31 03:07:48,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53997 conditions, 5935 events. 3815/5935 cut-off events. For 162297/162301 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32741 event pairs, 547 based on Foata normal form. 54/5975 useless extension candidates. Maximal degree in co-relation 53903. Up to 2837 conditions per place. [2023-08-31 03:07:48,042 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 554 selfloop transitions, 274 changer transitions 0/864 dead transitions. [2023-08-31 03:07:48,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 864 transitions, 15143 flow [2023-08-31 03:07:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 03:07:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 03:07:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1637 transitions. [2023-08-31 03:07:48,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379347244515784 [2023-08-31 03:07:48,044 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1637 transitions. [2023-08-31 03:07:48,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1637 transitions. [2023-08-31 03:07:48,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:48,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1637 transitions. [2023-08-31 03:07:48,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.92857142857143) internal successors, (1637), 14 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:48,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 267.0) internal successors, (4005), 15 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:48,050 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 267.0) internal successors, (4005), 15 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:48,050 INFO L175 Difference]: Start difference. First operand has 268 places, 652 transitions, 10006 flow. Second operand 14 states and 1637 transitions. [2023-08-31 03:07:48,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 864 transitions, 15143 flow [2023-08-31 03:07:48,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 864 transitions, 14956 flow, removed 91 selfloop flow, removed 3 redundant places. [2023-08-31 03:07:48,629 INFO L231 Difference]: Finished difference. Result has 282 places, 733 transitions, 12187 flow [2023-08-31 03:07:48,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=9873, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12187, PETRI_PLACES=282, PETRI_TRANSITIONS=733} [2023-08-31 03:07:48,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2023-08-31 03:07:48,630 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 733 transitions, 12187 flow [2023-08-31 03:07:48,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.85714285714286) internal successors, (2328), 21 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:48,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:48,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:48,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 03:07:48,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:48,831 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 03:07:48,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:48,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2112852909, now seen corresponding path program 14 times [2023-08-31 03:07:48,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:48,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532275964] [2023-08-31 03:07:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:48,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:48,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532275964] [2023-08-31 03:07:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532275964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290991832] [2023-08-31 03:07:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:07:48,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:48,960 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:48,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:07:49,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:07:49,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:07:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:49,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:49,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290991832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:49,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:49,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-08-31 03:07:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21668239] [2023-08-31 03:07:49,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:49,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:07:49,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:49,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:07:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:07:49,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:07:49,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 733 transitions, 12187 flow. Second operand has 22 states, 22 states have (on average 110.81818181818181) internal successors, (2438), 22 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:49,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:49,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:07:49,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:51,055 INFO L130 PetriNetUnfolder]: 3750/5798 cut-off events. [2023-08-31 03:07:51,055 INFO L131 PetriNetUnfolder]: For 152279/152283 co-relation queries the response was YES. [2023-08-31 03:07:51,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53707 conditions, 5798 events. 3750/5798 cut-off events. For 152279/152283 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31421 event pairs, 567 based on Foata normal form. 48/5832 useless extension candidates. Maximal degree in co-relation 53609. Up to 2837 conditions per place. [2023-08-31 03:07:51,117 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 513 selfloop transitions, 261 changer transitions 0/809 dead transitions. [2023-08-31 03:07:51,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 809 transitions, 14860 flow [2023-08-31 03:07:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 03:07:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 03:07:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1169 transitions. [2023-08-31 03:07:51,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378277153558052 [2023-08-31 03:07:51,119 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1169 transitions. [2023-08-31 03:07:51,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1169 transitions. [2023-08-31 03:07:51,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:51,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1169 transitions. [2023-08-31 03:07:51,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.9) internal successors, (1169), 10 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:51,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:51,123 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:51,124 INFO L175 Difference]: Start difference. First operand has 282 places, 733 transitions, 12187 flow. Second operand 10 states and 1169 transitions. [2023-08-31 03:07:51,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 809 transitions, 14860 flow [2023-08-31 03:07:51,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 809 transitions, 14506 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-08-31 03:07:51,913 INFO L231 Difference]: Finished difference. Result has 285 places, 726 transitions, 12247 flow [2023-08-31 03:07:51,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11725, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12247, PETRI_PLACES=285, PETRI_TRANSITIONS=726} [2023-08-31 03:07:51,914 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2023-08-31 03:07:51,914 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 726 transitions, 12247 flow [2023-08-31 03:07:51,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.81818181818181) internal successors, (2438), 22 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:51,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:51,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:51,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:52,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:52,121 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 03:07:52,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -710293371, now seen corresponding path program 15 times [2023-08-31 03:07:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:52,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384828988] [2023-08-31 03:07:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:52,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384828988] [2023-08-31 03:07:52,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384828988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982377577] [2023-08-31 03:07:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:07:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:52,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:52,249 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:52,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:07:52,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:07:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:07:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:52,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:07:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982377577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:52,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:52,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-31 03:07:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749263789] [2023-08-31 03:07:52,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:07:52,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:07:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:07:52,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-31 03:07:52,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 726 transitions, 12247 flow. Second operand has 20 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:52,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:52,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-31 03:07:52,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:54,335 INFO L130 PetriNetUnfolder]: 3816/5907 cut-off events. [2023-08-31 03:07:54,335 INFO L131 PetriNetUnfolder]: For 148796/148817 co-relation queries the response was YES. [2023-08-31 03:07:54,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54386 conditions, 5907 events. 3816/5907 cut-off events. For 148796/148817 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32272 event pairs, 449 based on Foata normal form. 55/5945 useless extension candidates. Maximal degree in co-relation 54288. Up to 2467 conditions per place. [2023-08-31 03:07:54,394 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 457 selfloop transitions, 324 changer transitions 0/816 dead transitions. [2023-08-31 03:07:54,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 816 transitions, 15247 flow [2023-08-31 03:07:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:07:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:07:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1048 transitions. [2023-08-31 03:07:54,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43612151477320016 [2023-08-31 03:07:54,396 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1048 transitions. [2023-08-31 03:07:54,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1048 transitions. [2023-08-31 03:07:54,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:54,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1048 transitions. [2023-08-31 03:07:54,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.44444444444444) internal successors, (1048), 9 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:54,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:54,398 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:54,399 INFO L175 Difference]: Start difference. First operand has 285 places, 726 transitions, 12247 flow. Second operand 9 states and 1048 transitions. [2023-08-31 03:07:54,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 816 transitions, 15247 flow [2023-08-31 03:07:55,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 816 transitions, 14846 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-31 03:07:55,030 INFO L231 Difference]: Finished difference. Result has 287 places, 744 transitions, 13007 flow [2023-08-31 03:07:55,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13007, PETRI_PLACES=287, PETRI_TRANSITIONS=744} [2023-08-31 03:07:55,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2023-08-31 03:07:55,031 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 744 transitions, 13007 flow [2023-08-31 03:07:55,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:55,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:55,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:55,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:55,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-31 03:07:55,233 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 03:07:55,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1132259183, now seen corresponding path program 16 times [2023-08-31 03:07:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:55,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582218329] [2023-08-31 03:07:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:55,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:55,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:55,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582218329] [2023-08-31 03:07:55,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582218329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718673111] [2023-08-31 03:07:55,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:07:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:55,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:55,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:07:55,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:07:55,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:07:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:07:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:55,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:07:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:55,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718673111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:07:55,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:07:55,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-31 03:07:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171250022] [2023-08-31 03:07:55,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:07:55,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:07:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:07:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:07:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:07:55,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-31 03:07:55,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 744 transitions, 13007 flow. Second operand has 20 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:55,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:07:55,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-31 03:07:55,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:07:58,559 INFO L130 PetriNetUnfolder]: 4032/6165 cut-off events. [2023-08-31 03:07:58,560 INFO L131 PetriNetUnfolder]: For 161246/161246 co-relation queries the response was YES. [2023-08-31 03:07:58,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57813 conditions, 6165 events. 4032/6165 cut-off events. For 161246/161246 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32954 event pairs, 322 based on Foata normal form. 48/6213 useless extension candidates. Maximal degree in co-relation 57713. Up to 2100 conditions per place. [2023-08-31 03:07:58,642 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 458 selfloop transitions, 511 changer transitions 0/969 dead transitions. [2023-08-31 03:07:58,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 969 transitions, 18309 flow [2023-08-31 03:07:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:07:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:07:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4147 transitions. [2023-08-31 03:07:58,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197793298916894 [2023-08-31 03:07:58,647 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4147 transitions. [2023-08-31 03:07:58,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4147 transitions. [2023-08-31 03:07:58,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:07:58,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4147 transitions. [2023-08-31 03:07:58,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 112.08108108108108) internal successors, (4147), 37 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:58,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:58,661 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:58,661 INFO L175 Difference]: Start difference. First operand has 287 places, 744 transitions, 13007 flow. Second operand 37 states and 4147 transitions. [2023-08-31 03:07:58,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 969 transitions, 18309 flow [2023-08-31 03:07:59,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 969 transitions, 18016 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-31 03:07:59,514 INFO L231 Difference]: Finished difference. Result has 313 places, 751 transitions, 14178 flow [2023-08-31 03:07:59,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=12512, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14178, PETRI_PLACES=313, PETRI_TRANSITIONS=751} [2023-08-31 03:07:59,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2023-08-31 03:07:59,515 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 751 transitions, 14178 flow [2023-08-31 03:07:59,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:07:59,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:07:59,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:07:59,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 03:07:59,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 03:07:59,716 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 03:07:59,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:07:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash -409751995, now seen corresponding path program 17 times [2023-08-31 03:07:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:07:59,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586580030] [2023-08-31 03:07:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:07:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:07:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:07:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:07:59,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:07:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586580030] [2023-08-31 03:07:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586580030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:07:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456232127] [2023-08-31 03:07:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:07:59,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:07:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:07:59,857 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:07:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:07:59,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:07:59,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:07:59,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:07:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:08:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:08:00,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:08:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:08:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456232127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:08:00,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:08:00,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 03:08:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638292073] [2023-08-31 03:08:00,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:08:00,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:08:00,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:08:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:08:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:08:00,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-31 03:08:00,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 751 transitions, 14178 flow. Second operand has 18 states, 18 states have (on average 107.44444444444444) internal successors, (1934), 18 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:08:00,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:08:00,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-31 03:08:00,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:08:02,287 INFO L130 PetriNetUnfolder]: 3960/6021 cut-off events. [2023-08-31 03:08:02,287 INFO L131 PetriNetUnfolder]: For 170854/170854 co-relation queries the response was YES. [2023-08-31 03:08:02,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58580 conditions, 6021 events. 3960/6021 cut-off events. For 170854/170854 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31814 event pairs, 736 based on Foata normal form. 54/6067 useless extension candidates. Maximal degree in co-relation 58479. Up to 4351 conditions per place. [2023-08-31 03:08:02,462 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 574 selfloop transitions, 268 changer transitions 0/842 dead transitions. [2023-08-31 03:08:02,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 842 transitions, 17075 flow [2023-08-31 03:08:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:08:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:08:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2116 transitions. [2023-08-31 03:08:02,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711019120835796 [2023-08-31 03:08:02,465 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2116 transitions. [2023-08-31 03:08:02,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2116 transitions. [2023-08-31 03:08:02,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:08:02,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2116 transitions. [2023-08-31 03:08:02,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.36842105263158) internal successors, (2116), 19 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:08:02,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:08:02,472 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:08:02,472 INFO L175 Difference]: Start difference. First operand has 313 places, 751 transitions, 14178 flow. Second operand 19 states and 2116 transitions. [2023-08-31 03:08:02,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 842 transitions, 17075 flow [2023-08-31 03:08:03,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 842 transitions, 16345 flow, removed 32 selfloop flow, removed 28 redundant places. [2023-08-31 03:08:03,143 INFO L231 Difference]: Finished difference. Result has 306 places, 751 transitions, 13891 flow [2023-08-31 03:08:03,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=13147, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13891, PETRI_PLACES=306, PETRI_TRANSITIONS=751} [2023-08-31 03:08:03,144 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2023-08-31 03:08:03,144 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 751 transitions, 13891 flow [2023-08-31 03:08:03,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.44444444444444) internal successors, (1934), 18 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:08:03,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:08:03,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:08:03,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:08:03,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:08:03,351 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 03:08:03,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:08:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1627145777, now seen corresponding path program 3 times [2023-08-31 03:08:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:08:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923477552] [2023-08-31 03:08:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:08:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:08:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:08:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:08:04,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:08:04,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923477552] [2023-08-31 03:08:04,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923477552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:08:04,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994127992] [2023-08-31 03:08:04,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:08:04,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:08:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:08:04,453 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:08:04,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:08:04,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:08:04,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:08:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-31 03:08:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:08:05,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:08:05,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 89 [2023-08-31 03:08:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:08:06,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:08:10,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:08:10,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 691 treesize of output 1179 [2023-08-31 03:08:14,794 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-31 03:08:50,870 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-31 03:10:37,899 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-31 03:12:37,730 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-31 03:18:57,408 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. Killed by 15