./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:57:17,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:57:17,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:57:17,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:57:17,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:57:17,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:57:17,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:57:17,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:57:17,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:57:17,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:57:17,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:57:17,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:57:17,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:57:17,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:57:17,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:57:17,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:57:17,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:57:17,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:57:17,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:57:17,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:57:17,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:57:17,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:57:17,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:57:17,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:57:17,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:57:17,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:57:17,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:57:17,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:57:17,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:57:17,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:57:17,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:57:17,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:57:17,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:57:17,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:57:17,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:57:17,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:57:17,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:57:17,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:57:17,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:57:17,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:57:17,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:57:17,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:57:17,179 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:57:17,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:57:17,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:57:17,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:57:17,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:57:17,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:57:17,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:57:17,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:57:17,182 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:57:17,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:57:17,183 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:57:17,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:57:17,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:57:17,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:57:17,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:57:17,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:57:17,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:57:17,185 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:57:17,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:57:17,185 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:57:17,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:57:17,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:57:17,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:57:17,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:57:17,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:57:17,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:57:17,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:57:17,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:57:17,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:57:17,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:57:17,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:57:17,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:57:17,188 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:57:17,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:57:17,188 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:57:17,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:57:17,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:57:17,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:57:17,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:57:17,501 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:57:17,505 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:57:17,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-30 19:57:18,734 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:57:18,958 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:57:18,958 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-30 19:57:18,964 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b237b131/1b12c007a41e4d0296c7eda6a7741092/FLAGfb48f365f [2023-08-30 19:57:18,976 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b237b131/1b12c007a41e4d0296c7eda6a7741092 [2023-08-30 19:57:18,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:57:18,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:57:18,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:57:18,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:57:18,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:57:18,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:57:18" (1/1) ... [2023-08-30 19:57:18,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1d84d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:18, skipping insertion in model container [2023-08-30 19:57:18,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:57:18" (1/1) ... [2023-08-30 19:57:18,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:57:19,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:57:19,141 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-30 19:57:19,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:57:19,162 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:57:19,196 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-30 19:57:19,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:57:19,216 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:57:19,216 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:57:19,222 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:57:19,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19 WrapperNode [2023-08-30 19:57:19,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:57:19,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:57:19,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:57:19,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:57:19,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,277 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2023-08-30 19:57:19,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:57:19,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:57:19,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:57:19,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:57:19,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,322 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:57:19,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:57:19,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:57:19,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:57:19,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (1/1) ... [2023-08-30 19:57:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:57:19,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:19,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 19:57:19,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 19:57:19,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:57:19,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:57:19,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:57:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:57:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:57:19,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:57:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:57:19,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:57:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:57:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:57:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:57:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:57:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:57:19,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:57:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:57:19,402 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:57:19,552 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:57:19,553 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:57:19,788 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:57:19,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:57:19,946 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:57:19,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:57:19 BoogieIcfgContainer [2023-08-30 19:57:19,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:57:19,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:57:19,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:57:19,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:57:19,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:57:18" (1/3) ... [2023-08-30 19:57:19,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65dd03e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:57:19, skipping insertion in model container [2023-08-30 19:57:19,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:57:19" (2/3) ... [2023-08-30 19:57:19,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65dd03e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:57:19, skipping insertion in model container [2023-08-30 19:57:19,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:57:19" (3/3) ... [2023-08-30 19:57:19,963 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-30 19:57:19,972 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:57:19,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:57:19,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:57:19,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:57:20,028 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:57:20,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 234 flow [2023-08-30 19:57:20,137 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2023-08-30 19:57:20,138 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:57:20,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-08-30 19:57:20,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 109 transitions, 234 flow [2023-08-30 19:57:20,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 210 flow [2023-08-30 19:57:20,152 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:57:20,167 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 99 transitions, 210 flow [2023-08-30 19:57:20,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 99 transitions, 210 flow [2023-08-30 19:57:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 99 transitions, 210 flow [2023-08-30 19:57:20,213 INFO L130 PetriNetUnfolder]: 9/99 cut-off events. [2023-08-30 19:57:20,213 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:57:20,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 9/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-08-30 19:57:20,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-30 19:57:23,623 INFO L134 LiptonReduction]: Checked pairs total: 585 [2023-08-30 19:57:23,624 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-30 19:57:23,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:57:23,640 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;@133e0bc4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:57:23,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:57:23,645 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 19:57:23,645 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:57:23,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:23,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:23,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:23,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1648247353, now seen corresponding path program 1 times [2023-08-30 19:57:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621016639] [2023-08-30 19:57:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:23,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:24,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:24,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621016639] [2023-08-30 19:57:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621016639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:57:24,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:57:24,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 19:57:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752782726] [2023-08-30 19:57:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:57:24,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:57:24,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:57:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:57:24,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 206 [2023-08-30 19:57:24,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:24,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 206 [2023-08-30 19:57:24,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:24,121 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2023-08-30 19:57:24,122 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 19:57:24,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-30 19:57:24,125 INFO L137 encePairwiseOnDemand]: 202/206 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-30 19:57:24,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-08-30 19:57:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:57:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:57:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-08-30 19:57:24,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032362459546925 [2023-08-30 19:57:24,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-08-30 19:57:24,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-08-30 19:57:24,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:24,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-08-30 19:57:24,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,161 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 311 transitions. [2023-08-30 19:57:24,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-08-30 19:57:24,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:57:24,166 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-08-30 19:57:24,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-08-30 19:57:24,171 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 19:57:24,172 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-08-30 19:57:24,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:24,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:57:24,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:24,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507108, now seen corresponding path program 1 times [2023-08-30 19:57:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705027765] [2023-08-30 19:57:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:24,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705027765] [2023-08-30 19:57:24,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705027765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:57:24,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:57:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:57:24,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36542778] [2023-08-30 19:57:24,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:57:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:57:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:57:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:57:24,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 206 [2023-08-30 19:57:24,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:24,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 206 [2023-08-30 19:57:24,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:24,482 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2023-08-30 19:57:24,482 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 19:57:24,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 819 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-08-30 19:57:24,485 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-30 19:57:24,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-08-30 19:57:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:57:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:57:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2023-08-30 19:57:24,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45728155339805826 [2023-08-30 19:57:24,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2023-08-30 19:57:24,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2023-08-30 19:57:24,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:24,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2023-08-30 19:57:24,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,494 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,494 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 471 transitions. [2023-08-30 19:57:24,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-08-30 19:57:24,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:57:24,496 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2023-08-30 19:57:24,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-30 19:57:24,497 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-30 19:57:24,498 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2023-08-30 19:57:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:24,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:57:24,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:24,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1514912191, now seen corresponding path program 1 times [2023-08-30 19:57:24,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:24,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795039313] [2023-08-30 19:57:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:24,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:24,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795039313] [2023-08-30 19:57:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795039313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:57:24,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:57:24,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:57:24,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978231676] [2023-08-30 19:57:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:57:24,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:57:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:57:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:57:24,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 206 [2023-08-30 19:57:24,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:24,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 206 [2023-08-30 19:57:24,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:24,763 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2023-08-30 19:57:24,763 INFO L131 PetriNetUnfolder]: For 65/70 co-relation queries the response was YES. [2023-08-30 19:57:24,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 542 event pairs, 40 based on Foata normal form. 11/170 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2023-08-30 19:57:24,767 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-08-30 19:57:24,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2023-08-30 19:57:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:57:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:57:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2023-08-30 19:57:24,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436893203883494 [2023-08-30 19:57:24,769 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2023-08-30 19:57:24,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2023-08-30 19:57:24,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:24,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2023-08-30 19:57:24,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,773 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,774 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 468 transitions. [2023-08-30 19:57:24,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2023-08-30 19:57:24,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 19:57:24,778 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2023-08-30 19:57:24,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-30 19:57:24,779 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-30 19:57:24,782 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2023-08-30 19:57:24,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:24,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:24,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:24,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:57:24,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:24,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 818882596, now seen corresponding path program 1 times [2023-08-30 19:57:24,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:24,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307707575] [2023-08-30 19:57:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:24,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307707575] [2023-08-30 19:57:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307707575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971090811] [2023-08-30 19:57:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:24,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:24,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:24,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:57:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:25,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:57:25,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:25,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971090811] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:25,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:57:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 19:57:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605623332] [2023-08-30 19:57:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:57:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:57:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:57:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:57:25,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:25,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:25,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:25,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:25,285 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2023-08-30 19:57:25,285 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 19:57:25,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 350 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2023-08-30 19:57:25,286 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-08-30 19:57:25,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2023-08-30 19:57:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:57:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:57:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2023-08-30 19:57:25,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43106796116504853 [2023-08-30 19:57:25,288 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2023-08-30 19:57:25,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2023-08-30 19:57:25,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:25,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2023-08-30 19:57:25,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,292 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 444 transitions. [2023-08-30 19:57:25,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2023-08-30 19:57:25,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-30 19:57:25,294 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-08-30 19:57:25,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-08-30 19:57:25,294 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-30 19:57:25,295 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-08-30 19:57:25,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:25,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:25,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 19:57:25,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:25,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:25,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1062328821, now seen corresponding path program 1 times [2023-08-30 19:57:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:25,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836902789] [2023-08-30 19:57:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836902789] [2023-08-30 19:57:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836902789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761826860] [2023-08-30 19:57:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:25,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:25,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:25,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:57:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:57:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:25,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761826860] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:25,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:57:25,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 19:57:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974634451] [2023-08-30 19:57:25,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:57:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:57:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:57:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:57:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:25,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:25,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:25,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:25,865 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2023-08-30 19:57:25,865 INFO L131 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2023-08-30 19:57:25,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-08-30 19:57:25,866 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-30 19:57:25,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-08-30 19:57:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:57:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:57:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2023-08-30 19:57:25,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43106796116504853 [2023-08-30 19:57:25,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2023-08-30 19:57:25,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2023-08-30 19:57:25,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:25,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2023-08-30 19:57:25,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,875 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,875 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 444 transitions. [2023-08-30 19:57:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-08-30 19:57:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:57:25,878 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-08-30 19:57:25,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-30 19:57:25,879 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-30 19:57:25,879 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-08-30 19:57:25,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:25,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:25,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:25,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 19:57:26,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:26,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:26,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1690720491, now seen corresponding path program 1 times [2023-08-30 19:57:26,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:26,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457663702] [2023-08-30 19:57:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:26,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:26,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457663702] [2023-08-30 19:57:26,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457663702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:26,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654679253] [2023-08-30 19:57:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:26,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:26,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:57:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 19:57:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:26,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:57:26,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:57:26,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:57:26,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 19:57:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:26,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:27,053 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))))) is different from false [2023-08-30 19:57:27,071 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-08-30 19:57:27,095 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-08-30 19:57:27,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:27,107 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 46 treesize of output 35 [2023-08-30 19:57:27,114 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 286 treesize of output 254 [2023-08-30 19:57:27,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-08-30 19:57:27,143 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 24 treesize of output 20 [2023-08-30 19:57:27,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:27,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 19:57:27,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:57:27,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2023-08-30 19:57:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 19:57:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654679253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:27,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:27,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-30 19:57:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267363875] [2023-08-30 19:57:27,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:57:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:57:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=243, Unknown=6, NotChecked=102, Total=420 [2023-08-30 19:57:27,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-08-30 19:57:27,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:27,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:27,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-08-30 19:57:27,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:27,492 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2023-08-30 19:57:27,492 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-08-30 19:57:27,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-08-30 19:57:27,494 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-08-30 19:57:27,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-08-30 19:57:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:57:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:57:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-08-30 19:57:27,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402912621359226 [2023-08-30 19:57:27,496 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-08-30 19:57:27,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-08-30 19:57:27,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:27,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-08-30 19:57:27,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:27,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:27,500 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:27,500 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-08-30 19:57:27,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-08-30 19:57:27,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 19:57:27,502 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-08-30 19:57:27,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 19:57:27,503 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-30 19:57:27,503 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-08-30 19:57:27,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:27,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:27,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:27,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:27,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:27,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:27,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1211991097, now seen corresponding path program 2 times [2023-08-30 19:57:27,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:27,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826306469] [2023-08-30 19:57:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:27,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:28,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:28,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826306469] [2023-08-30 19:57:28,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826306469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:28,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495106777] [2023-08-30 19:57:28,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:57:28,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:28,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:28,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:28,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:57:28,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:28,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:28,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:57:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:28,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:28,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:28,253 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 22 treesize of output 15 [2023-08-30 19:57:28,264 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:57:28,265 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 21 treesize of output 10 [2023-08-30 19:57:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495106777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:28,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:28,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 19:57:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431654901] [2023-08-30 19:57:28,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:28,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:57:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:57:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:57:28,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:28,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:28,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:28,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:28,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:28,609 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2023-08-30 19:57:28,610 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-08-30 19:57:28,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 782 event pairs, 25 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-08-30 19:57:28,612 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-08-30 19:57:28,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-08-30 19:57:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 633 transitions. [2023-08-30 19:57:28,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-08-30 19:57:28,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 633 transitions. [2023-08-30 19:57:28,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 633 transitions. [2023-08-30 19:57:28,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:28,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 633 transitions. [2023-08-30 19:57:28,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.42857142857143) internal successors, (633), 7 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:28,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:28,619 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:28,619 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 633 transitions. [2023-08-30 19:57:28,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-08-30 19:57:28,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 19:57:28,624 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-08-30 19:57:28,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-30 19:57:28,625 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-30 19:57:28,625 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-08-30 19:57:28,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:28,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:28,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:28,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 19:57:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:28,833 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:28,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1666552779, now seen corresponding path program 3 times [2023-08-30 19:57:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988950738] [2023-08-30 19:57:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988950738] [2023-08-30 19:57:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988950738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:29,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689543362] [2023-08-30 19:57:29,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:57:29,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:29,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:29,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:57:29,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:57:29,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:57:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:29,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:29,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:29,295 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 22 treesize of output 15 [2023-08-30 19:57:29,305 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:57:29,305 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 21 treesize of output 10 [2023-08-30 19:57:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:29,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689543362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:29,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:29,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 19:57:29,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322641048] [2023-08-30 19:57:29,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:29,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:57:29,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:57:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:57:29,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:29,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:29,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:29,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:29,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:29,644 INFO L130 PetriNetUnfolder]: 159/285 cut-off events. [2023-08-30 19:57:29,645 INFO L131 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2023-08-30 19:57:29,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 285 events. 159/285 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 960 event pairs, 33 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1087. Up to 233 conditions per place. [2023-08-30 19:57:29,647 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 45 selfloop transitions, 14 changer transitions 1/60 dead transitions. [2023-08-30 19:57:29,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 470 flow [2023-08-30 19:57:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 633 transitions. [2023-08-30 19:57:29,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-08-30 19:57:29,649 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 633 transitions. [2023-08-30 19:57:29,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 633 transitions. [2023-08-30 19:57:29,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:29,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 633 transitions. [2023-08-30 19:57:29,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.42857142857143) internal successors, (633), 7 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:29,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:29,653 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:29,653 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 633 transitions. [2023-08-30 19:57:29,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 470 flow [2023-08-30 19:57:29,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 19:57:29,657 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 339 flow [2023-08-30 19:57:29,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-30 19:57:29,659 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-30 19:57:29,659 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 339 flow [2023-08-30 19:57:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:29,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:29,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:29,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:29,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:29,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:29,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2131943909, now seen corresponding path program 4 times [2023-08-30 19:57:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69014363] [2023-08-30 19:57:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69014363] [2023-08-30 19:57:30,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69014363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528787314] [2023-08-30 19:57:30,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:57:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:30,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:30,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:57:30,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:57:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:57:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:30,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:30,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:30,390 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 22 treesize of output 15 [2023-08-30 19:57:30,399 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:57:30,400 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 21 treesize of output 10 [2023-08-30 19:57:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:30,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528787314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:30,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:30,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 19:57:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950557459] [2023-08-30 19:57:30,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:30,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:57:30,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:30,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:57:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:57:30,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:30,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 339 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:30,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:30,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:30,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:30,724 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2023-08-30 19:57:30,725 INFO L131 PetriNetUnfolder]: For 689/689 co-relation queries the response was YES. [2023-08-30 19:57:30,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 314 events. 175/314 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1103 event pairs, 37 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1248. Up to 258 conditions per place. [2023-08-30 19:57:30,727 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-08-30 19:57:30,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 547 flow [2023-08-30 19:57:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:30,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 635 transitions. [2023-08-30 19:57:30,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403606102635229 [2023-08-30 19:57:30,730 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 635 transitions. [2023-08-30 19:57:30,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 635 transitions. [2023-08-30 19:57:30,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:30,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 635 transitions. [2023-08-30 19:57:30,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:30,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:30,734 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:30,734 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 339 flow. Second operand 7 states and 635 transitions. [2023-08-30 19:57:30,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 547 flow [2023-08-30 19:57:30,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 516 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 19:57:30,738 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 383 flow [2023-08-30 19:57:30,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-30 19:57:30,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-08-30 19:57:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 383 flow [2023-08-30 19:57:30,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:30,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:30,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:30,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:30,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:30,948 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:30,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1333660907, now seen corresponding path program 5 times [2023-08-30 19:57:30,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:30,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027862788] [2023-08-30 19:57:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027862788] [2023-08-30 19:57:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027862788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:31,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322075792] [2023-08-30 19:57:31,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:57:31,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:31,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:31,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:31,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:57:31,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:31,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:57:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:31,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:31,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:31,454 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 22 treesize of output 15 [2023-08-30 19:57:31,463 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:57:31,463 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 21 treesize of output 10 [2023-08-30 19:57:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:31,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322075792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:31,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:31,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 19:57:31,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823921025] [2023-08-30 19:57:31,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:31,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:57:31,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:31,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:57:31,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:57:31,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:31,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 383 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:31,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:31,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:31,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:31,848 INFO L130 PetriNetUnfolder]: 197/353 cut-off events. [2023-08-30 19:57:31,849 INFO L131 PetriNetUnfolder]: For 1017/1017 co-relation queries the response was YES. [2023-08-30 19:57:31,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 353 events. 197/353 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1295 event pairs, 49 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1455. Up to 301 conditions per place. [2023-08-30 19:57:31,852 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-08-30 19:57:31,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 596 flow [2023-08-30 19:57:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2023-08-30 19:57:31,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375866851595007 [2023-08-30 19:57:31,854 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2023-08-30 19:57:31,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2023-08-30 19:57:31,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:31,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2023-08-30 19:57:31,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:31,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:31,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:31,858 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 383 flow. Second operand 7 states and 631 transitions. [2023-08-30 19:57:31,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 596 flow [2023-08-30 19:57:31,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 554 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-30 19:57:31,865 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 431 flow [2023-08-30 19:57:31,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-08-30 19:57:31,867 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-08-30 19:57:31,867 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 431 flow [2023-08-30 19:57:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:31,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:31,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:31,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:32,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:32,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash 448505845, now seen corresponding path program 6 times [2023-08-30 19:57:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:32,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744136920] [2023-08-30 19:57:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:32,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:32,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744136920] [2023-08-30 19:57:32,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744136920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:32,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785164539] [2023-08-30 19:57:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:57:32,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:32,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:32,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:57:32,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:57:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:57:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:32,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:32,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:32,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-08-30 19:57:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785164539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:32,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:32,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 19:57:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080260529] [2023-08-30 19:57:32,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:32,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:57:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:57:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:57:32,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:32,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 431 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:32,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:32,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:32,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:32,893 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2023-08-30 19:57:32,893 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2023-08-30 19:57:32,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 402 events. 225/402 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1520 event pairs, 43 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1682. Up to 330 conditions per place. [2023-08-30 19:57:32,896 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 52 selfloop transitions, 19 changer transitions 1/72 dead transitions. [2023-08-30 19:57:32,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 692 flow [2023-08-30 19:57:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 633 transitions. [2023-08-30 19:57:32,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-08-30 19:57:32,899 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 633 transitions. [2023-08-30 19:57:32,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 633 transitions. [2023-08-30 19:57:32,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:32,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 633 transitions. [2023-08-30 19:57:32,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.42857142857143) internal successors, (633), 7 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:32,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:32,903 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:32,903 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 431 flow. Second operand 7 states and 633 transitions. [2023-08-30 19:57:32,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 692 flow [2023-08-30 19:57:32,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 645 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-30 19:57:32,909 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 525 flow [2023-08-30 19:57:32,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-08-30 19:57:32,911 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-08-30 19:57:32,911 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 525 flow [2023-08-30 19:57:32,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:32,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:32,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:32,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 19:57:33,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:33,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2097028727, now seen corresponding path program 7 times [2023-08-30 19:57:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007173835] [2023-08-30 19:57:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:33,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007173835] [2023-08-30 19:57:33,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007173835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221092182] [2023-08-30 19:57:33,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:57:33,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:33,203 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:33,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:57:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:57:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:33,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221092182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:33,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:33,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 19:57:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102791147] [2023-08-30 19:57:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:33,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:57:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:57:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:57:33,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:33,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 525 flow. Second operand has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:33,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:33,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:33,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:33,761 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2023-08-30 19:57:33,762 INFO L131 PetriNetUnfolder]: For 2658/2690 co-relation queries the response was YES. [2023-08-30 19:57:33,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 695 events. 371/695 cut-off events. For 2658/2690 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3427 event pairs, 86 based on Foata normal form. 57/743 useless extension candidates. Maximal degree in co-relation 2560. Up to 275 conditions per place. [2023-08-30 19:57:33,767 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2023-08-30 19:57:33,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1289 flow [2023-08-30 19:57:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:57:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:57:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 720 transitions. [2023-08-30 19:57:33,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368932038834951 [2023-08-30 19:57:33,769 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 720 transitions. [2023-08-30 19:57:33,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 720 transitions. [2023-08-30 19:57:33,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:33,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 720 transitions. [2023-08-30 19:57:33,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.0) internal successors, (720), 8 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:33,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:33,774 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:33,774 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 525 flow. Second operand 8 states and 720 transitions. [2023-08-30 19:57:33,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1289 flow [2023-08-30 19:57:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1168 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-08-30 19:57:33,784 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 694 flow [2023-08-30 19:57:33,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2023-08-30 19:57:33,786 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-08-30 19:57:33,786 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 694 flow [2023-08-30 19:57:33,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:33,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:33,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:33,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:33,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:33,992 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:33,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 559731294, now seen corresponding path program 8 times [2023-08-30 19:57:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:33,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861137845] [2023-08-30 19:57:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861137845] [2023-08-30 19:57:34,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861137845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580125119] [2023-08-30 19:57:34,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:57:34,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:34,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:34,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:57:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:57:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580125119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:34,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:34,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 19:57:34,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692518549] [2023-08-30 19:57:34,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:34,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:57:34,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:57:34,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:57:34,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:34,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:34,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:34,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:34,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:34,642 INFO L130 PetriNetUnfolder]: 305/610 cut-off events. [2023-08-30 19:57:34,643 INFO L131 PetriNetUnfolder]: For 1858/1889 co-relation queries the response was YES. [2023-08-30 19:57:34,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 610 events. 305/610 cut-off events. For 1858/1889 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3090 event pairs, 89 based on Foata normal form. 65/674 useless extension candidates. Maximal degree in co-relation 2329. Up to 251 conditions per place. [2023-08-30 19:57:34,647 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2023-08-30 19:57:34,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1137 flow [2023-08-30 19:57:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:57:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:57:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 719 transitions. [2023-08-30 19:57:34,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362864077669903 [2023-08-30 19:57:34,650 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 719 transitions. [2023-08-30 19:57:34,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 719 transitions. [2023-08-30 19:57:34,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:34,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 719 transitions. [2023-08-30 19:57:34,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:34,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:34,655 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:34,655 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 694 flow. Second operand 8 states and 719 transitions. [2023-08-30 19:57:34,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1137 flow [2023-08-30 19:57:34,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 1129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 19:57:34,667 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 567 flow [2023-08-30 19:57:34,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-08-30 19:57:34,668 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-08-30 19:57:34,669 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 567 flow [2023-08-30 19:57:34,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:34,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:34,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:34,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:34,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 19:57:34,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:34,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 650633796, now seen corresponding path program 9 times [2023-08-30 19:57:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790098095] [2023-08-30 19:57:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:34,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:34,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790098095] [2023-08-30 19:57:34,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790098095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:34,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120388035] [2023-08-30 19:57:34,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:57:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:34,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:35,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:57:35,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:57:35,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:57:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:35,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120388035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:35,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:35,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 19:57:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556134838] [2023-08-30 19:57:35,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:35,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:57:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:57:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:57:35,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:35,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 567 flow. Second operand has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:35,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:35,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:35,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:35,524 INFO L130 PetriNetUnfolder]: 166/297 cut-off events. [2023-08-30 19:57:35,524 INFO L131 PetriNetUnfolder]: For 1555/1562 co-relation queries the response was YES. [2023-08-30 19:57:35,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 297 events. 166/297 cut-off events. For 1555/1562 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1041 event pairs, 28 based on Foata normal form. 51/347 useless extension candidates. Maximal degree in co-relation 1552. Up to 139 conditions per place. [2023-08-30 19:57:35,527 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2023-08-30 19:57:35,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 785 flow [2023-08-30 19:57:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-08-30 19:57:35,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292649098474341 [2023-08-30 19:57:35,529 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-08-30 19:57:35,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-08-30 19:57:35,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:35,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-08-30 19:57:35,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:35,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:35,533 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:35,533 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 567 flow. Second operand 7 states and 619 transitions. [2023-08-30 19:57:35,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 785 flow [2023-08-30 19:57:35,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 630 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-08-30 19:57:35,545 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 510 flow [2023-08-30 19:57:35,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-30 19:57:35,546 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-08-30 19:57:35,546 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 510 flow [2023-08-30 19:57:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:35,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:35,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:35,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 19:57:35,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 19:57:35,753 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:35,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash -937838569, now seen corresponding path program 10 times [2023-08-30 19:57:35,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:35,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99542031] [2023-08-30 19:57:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:35,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99542031] [2023-08-30 19:57:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99542031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492989687] [2023-08-30 19:57:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:57:35,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:35,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:35,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:35,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:57:35,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:57:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:57:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:36,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492989687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:36,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:36,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 19:57:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067874276] [2023-08-30 19:57:36,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:36,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:57:36,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:57:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:57:36,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:36,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 510 flow. Second operand has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:36,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:36,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:36,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:36,321 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2023-08-30 19:57:36,321 INFO L131 PetriNetUnfolder]: For 1305/1311 co-relation queries the response was YES. [2023-08-30 19:57:36,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 214 events. 120/214 cut-off events. For 1305/1311 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 643 event pairs, 27 based on Foata normal form. 30/239 useless extension candidates. Maximal degree in co-relation 1167. Up to 118 conditions per place. [2023-08-30 19:57:36,323 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-08-30 19:57:36,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 730 flow [2023-08-30 19:57:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:57:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:57:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-08-30 19:57:36,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292649098474341 [2023-08-30 19:57:36,327 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-08-30 19:57:36,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-08-30 19:57:36,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:36,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-08-30 19:57:36,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:36,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:36,331 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:36,331 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 510 flow. Second operand 7 states and 619 transitions. [2023-08-30 19:57:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 730 flow [2023-08-30 19:57:36,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 648 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-30 19:57:36,340 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 522 flow [2023-08-30 19:57:36,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-08-30 19:57:36,341 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-08-30 19:57:36,341 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 522 flow [2023-08-30 19:57:36,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:36,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:36,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:36,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:36,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:57:36,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:36,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -603236243, now seen corresponding path program 11 times [2023-08-30 19:57:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:36,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055780523] [2023-08-30 19:57:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:36,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:37,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055780523] [2023-08-30 19:57:37,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055780523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:37,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478708079] [2023-08-30 19:57:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:57:37,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:37,485 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:37,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:57:37,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-30 19:57:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:57:37,741 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 20 treesize of output 20 [2023-08-30 19:57:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:37,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:37,977 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_446 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ c_~counter~0 1))) (forall ((v_ArrVal_446 (Array Int Int))) (<= c_~counter~0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse2 .cse1) (select .cse2 c_~A~0.offset))))))) is different from false [2023-08-30 19:57:38,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 68 [2023-08-30 19:57:38,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:38,064 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 19 treesize of output 13 [2023-08-30 19:57:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:57:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478708079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:38,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 29 [2023-08-30 19:57:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137131252] [2023-08-30 19:57:38,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:57:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:57:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=763, Unknown=5, NotChecked=56, Total=930 [2023-08-30 19:57:38,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 19:57:38,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 522 flow. Second operand has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:38,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:38,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 19:57:38,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:39,203 INFO L130 PetriNetUnfolder]: 182/321 cut-off events. [2023-08-30 19:57:39,203 INFO L131 PetriNetUnfolder]: For 1826/1826 co-relation queries the response was YES. [2023-08-30 19:57:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 321 events. 182/321 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1066 event pairs, 11 based on Foata normal form. 1/321 useless extension candidates. Maximal degree in co-relation 1758. Up to 187 conditions per place. [2023-08-30 19:57:39,206 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 65 selfloop transitions, 40 changer transitions 1/106 dead transitions. [2023-08-30 19:57:39,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 991 flow [2023-08-30 19:57:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:57:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:57:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2023-08-30 19:57:39,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2821601941747573 [2023-08-30 19:57:39,210 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2023-08-30 19:57:39,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2023-08-30 19:57:39,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:39,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2023-08-30 19:57:39,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:39,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:39,217 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:39,217 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 522 flow. Second operand 16 states and 930 transitions. [2023-08-30 19:57:39,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 991 flow [2023-08-30 19:57:39,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 924 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-30 19:57:39,225 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 726 flow [2023-08-30 19:57:39,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=726, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-08-30 19:57:39,226 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-08-30 19:57:39,226 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 726 flow [2023-08-30 19:57:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:39,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:39,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:39,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:39,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:57:39,433 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:39,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1564132795, now seen corresponding path program 12 times [2023-08-30 19:57:39,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255385908] [2023-08-30 19:57:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:39,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255385908] [2023-08-30 19:57:39,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255385908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762073910] [2023-08-30 19:57:39,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:57:39,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:39,869 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:39,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 19:57:39,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:57:39,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:57:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:40,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:40,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:40,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-08-30 19:57:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:40,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762073910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:40,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:40,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-08-30 19:57:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852704331] [2023-08-30 19:57:40,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:40,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:57:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:57:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:57:40,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:57:40,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 726 flow. Second operand has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:40,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:40,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:57:40,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:41,059 INFO L130 PetriNetUnfolder]: 270/480 cut-off events. [2023-08-30 19:57:41,059 INFO L131 PetriNetUnfolder]: For 2957/2957 co-relation queries the response was YES. [2023-08-30 19:57:41,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 480 events. 270/480 cut-off events. For 2957/2957 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1797 event pairs, 29 based on Foata normal form. 2/481 useless extension candidates. Maximal degree in co-relation 2770. Up to 317 conditions per place. [2023-08-30 19:57:41,064 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 95 selfloop transitions, 39 changer transitions 2/136 dead transitions. [2023-08-30 19:57:41,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1436 flow [2023-08-30 19:57:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:57:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:57:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1266 transitions. [2023-08-30 19:57:41,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-08-30 19:57:41,067 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1266 transitions. [2023-08-30 19:57:41,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1266 transitions. [2023-08-30 19:57:41,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:41,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1266 transitions. [2023-08-30 19:57:41,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:41,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:41,073 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:41,073 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 726 flow. Second operand 14 states and 1266 transitions. [2023-08-30 19:57:41,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1436 flow [2023-08-30 19:57:41,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 1295 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-08-30 19:57:41,084 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 1004 flow [2023-08-30 19:57:41,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1004, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2023-08-30 19:57:41,085 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-08-30 19:57:41,085 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 1004 flow [2023-08-30 19:57:41,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:41,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:41,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:41,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:41,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:41,300 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:41,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -701418181, now seen corresponding path program 13 times [2023-08-30 19:57:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:41,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780350537] [2023-08-30 19:57:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:42,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780350537] [2023-08-30 19:57:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780350537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534914764] [2023-08-30 19:57:42,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:57:42,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:42,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:57:42,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 19:57:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-30 19:57:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:42,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:57:42,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:42,286 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 31 treesize of output 14 [2023-08-30 19:57:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:42,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:42,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:42,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-08-30 19:57:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534914764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:42,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:42,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2023-08-30 19:57:42,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645944617] [2023-08-30 19:57:42,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:57:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:57:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:57:43,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-08-30 19:57:43,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 1004 flow. Second operand has 20 states, 20 states have (on average 79.1) internal successors, (1582), 20 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:43,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:43,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-08-30 19:57:43,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:43,565 INFO L130 PetriNetUnfolder]: 302/538 cut-off events. [2023-08-30 19:57:43,566 INFO L131 PetriNetUnfolder]: For 3569/3569 co-relation queries the response was YES. [2023-08-30 19:57:43,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 538 events. 302/538 cut-off events. For 3569/3569 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2082 event pairs, 47 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 3144. Up to 408 conditions per place. [2023-08-30 19:57:43,571 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 96 selfloop transitions, 35 changer transitions 2/133 dead transitions. [2023-08-30 19:57:43,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1484 flow [2023-08-30 19:57:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:57:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:57:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1317 transitions. [2023-08-30 19:57:43,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995752427184466 [2023-08-30 19:57:43,574 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1317 transitions. [2023-08-30 19:57:43,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1317 transitions. [2023-08-30 19:57:43,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:43,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1317 transitions. [2023-08-30 19:57:43,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.3125) internal successors, (1317), 16 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:43,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:43,581 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:43,581 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 1004 flow. Second operand 16 states and 1317 transitions. [2023-08-30 19:57:43,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1484 flow [2023-08-30 19:57:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 1329 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-08-30 19:57:43,594 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 1013 flow [2023-08-30 19:57:43,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1013, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-08-30 19:57:43,595 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-08-30 19:57:43,595 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1013 flow [2023-08-30 19:57:43,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.1) internal successors, (1582), 20 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:43,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:43,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:43,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:43,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 19:57:43,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:43,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1056177927, now seen corresponding path program 14 times [2023-08-30 19:57:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:43,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859925835] [2023-08-30 19:57:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:44,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:44,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859925835] [2023-08-30 19:57:44,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859925835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:44,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356385793] [2023-08-30 19:57:44,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:57:44,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:44,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:44,381 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) [2023-08-30 19:57:44,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 19:57:44,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:57:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:44,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:44,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:44,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:57:44,780 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:57:44,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:57:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:44,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356385793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:44,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:44,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-08-30 19:57:44,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261722734] [2023-08-30 19:57:44,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:57:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:57:44,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:57:45,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-08-30 19:57:45,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1013 flow. Second operand has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:45,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:45,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-08-30 19:57:45,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:45,755 INFO L130 PetriNetUnfolder]: 374/666 cut-off events. [2023-08-30 19:57:45,756 INFO L131 PetriNetUnfolder]: For 4582/4582 co-relation queries the response was YES. [2023-08-30 19:57:45,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 666 events. 374/666 cut-off events. For 4582/4582 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2766 event pairs, 71 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3841. Up to 536 conditions per place. [2023-08-30 19:57:45,762 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 115 selfloop transitions, 30 changer transitions 2/147 dead transitions. [2023-08-30 19:57:45,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1749 flow [2023-08-30 19:57:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:57:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:57:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1315 transitions. [2023-08-30 19:57:45,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39896844660194175 [2023-08-30 19:57:45,766 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1315 transitions. [2023-08-30 19:57:45,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1315 transitions. [2023-08-30 19:57:45,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:45,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1315 transitions. [2023-08-30 19:57:45,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.1875) internal successors, (1315), 16 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:45,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:45,772 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:45,773 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 1013 flow. Second operand 16 states and 1315 transitions. [2023-08-30 19:57:45,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1749 flow [2023-08-30 19:57:45,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1647 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-08-30 19:57:45,788 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1287 flow [2023-08-30 19:57:45,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1287, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2023-08-30 19:57:45,789 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-08-30 19:57:45,789 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1287 flow [2023-08-30 19:57:45,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:45,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:45,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:45,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:46,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:46,008 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:46,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash -425348409, now seen corresponding path program 15 times [2023-08-30 19:57:46,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:46,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030267088] [2023-08-30 19:57:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:46,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:46,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:46,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030267088] [2023-08-30 19:57:46,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030267088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:46,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208495991] [2023-08-30 19:57:46,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:57:46,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:46,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:46,573 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) [2023-08-30 19:57:46,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 19:57:46,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:57:46,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-30 19:57:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:46,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:47,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:47,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:57:47,118 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:57:47,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:57:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:47,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208495991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:47,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:47,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-30 19:57:47,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630548908] [2023-08-30 19:57:47,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:47,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:57:47,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:57:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:57:47,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-08-30 19:57:47,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1287 flow. Second operand has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:47,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:47,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-08-30 19:57:47,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:48,571 INFO L130 PetriNetUnfolder]: 460/822 cut-off events. [2023-08-30 19:57:48,571 INFO L131 PetriNetUnfolder]: For 6416/6416 co-relation queries the response was YES. [2023-08-30 19:57:48,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 822 events. 460/822 cut-off events. For 6416/6416 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3692 event pairs, 92 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 4883. Up to 663 conditions per place. [2023-08-30 19:57:48,579 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 134 selfloop transitions, 37 changer transitions 2/173 dead transitions. [2023-08-30 19:57:48,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 173 transitions, 2127 flow [2023-08-30 19:57:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:57:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:57:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1488 transitions. [2023-08-30 19:57:48,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38017373530914667 [2023-08-30 19:57:48,583 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1488 transitions. [2023-08-30 19:57:48,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1488 transitions. [2023-08-30 19:57:48,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:48,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1488 transitions. [2023-08-30 19:57:48,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.3157894736842) internal successors, (1488), 19 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:48,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:48,590 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:48,591 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1287 flow. Second operand 19 states and 1488 transitions. [2023-08-30 19:57:48,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 173 transitions, 2127 flow [2023-08-30 19:57:48,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 1875 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-08-30 19:57:48,611 INFO L231 Difference]: Finished difference. Result has 137 places, 125 transitions, 1438 flow [2023-08-30 19:57:48,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1438, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2023-08-30 19:57:48,612 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-08-30 19:57:48,612 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 1438 flow [2023-08-30 19:57:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:48,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:48,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:48,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:48,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:48,819 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:48,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2097113607, now seen corresponding path program 16 times [2023-08-30 19:57:48,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:48,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828134297] [2023-08-30 19:57:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:49,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:49,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828134297] [2023-08-30 19:57:49,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828134297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:49,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847988821] [2023-08-30 19:57:49,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:57:49,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:49,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:49,337 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) [2023-08-30 19:57:49,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 19:57:49,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:57:49,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-30 19:57:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:49,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:57:49,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:49,614 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 31 treesize of output 14 [2023-08-30 19:57:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:49,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:49,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:49,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:57:49,806 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:57:49,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:57:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:49,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847988821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:49,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:49,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-08-30 19:57:49,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065536770] [2023-08-30 19:57:49,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:49,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:57:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:49,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:57:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:57:50,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-08-30 19:57:50,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 1438 flow. Second operand has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:50,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:50,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-08-30 19:57:50,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:50,804 INFO L130 PetriNetUnfolder]: 532/953 cut-off events. [2023-08-30 19:57:50,805 INFO L131 PetriNetUnfolder]: For 7118/7118 co-relation queries the response was YES. [2023-08-30 19:57:50,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 953 events. 532/953 cut-off events. For 7118/7118 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4485 event pairs, 123 based on Foata normal form. 2/954 useless extension candidates. Maximal degree in co-relation 5526. Up to 806 conditions per place. [2023-08-30 19:57:50,812 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 140 selfloop transitions, 32 changer transitions 3/175 dead transitions. [2023-08-30 19:57:50,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2175 flow [2023-08-30 19:57:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:57:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:57:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1180 transitions. [2023-08-30 19:57:50,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3818770226537217 [2023-08-30 19:57:50,817 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1180 transitions. [2023-08-30 19:57:50,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1180 transitions. [2023-08-30 19:57:50,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:50,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1180 transitions. [2023-08-30 19:57:50,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.66666666666667) internal successors, (1180), 15 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:50,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:50,823 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:50,823 INFO L175 Difference]: Start difference. First operand has 137 places, 125 transitions, 1438 flow. Second operand 15 states and 1180 transitions. [2023-08-30 19:57:50,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2175 flow [2023-08-30 19:57:50,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 1910 flow, removed 109 selfloop flow, removed 12 redundant places. [2023-08-30 19:57:50,848 INFO L231 Difference]: Finished difference. Result has 143 places, 135 transitions, 1486 flow [2023-08-30 19:57:50,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1486, PETRI_PLACES=143, PETRI_TRANSITIONS=135} [2023-08-30 19:57:50,848 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-08-30 19:57:50,848 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 135 transitions, 1486 flow [2023-08-30 19:57:50,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:50,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:50,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:50,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:51,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:51,055 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:51,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1659998111, now seen corresponding path program 17 times [2023-08-30 19:57:51,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:51,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818789061] [2023-08-30 19:57:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:51,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818789061] [2023-08-30 19:57:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818789061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884824227] [2023-08-30 19:57:51,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:57:51,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:51,603 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) [2023-08-30 19:57:51,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 19:57:51,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-30 19:57:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:51,881 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:57:51,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:51,883 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 31 treesize of output 14 [2023-08-30 19:57:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:51,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:51,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:51,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:57:52,055 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:57:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:57:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:52,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884824227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:52,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:52,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-08-30 19:57:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63949976] [2023-08-30 19:57:52,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:52,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:57:52,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:57:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:57:52,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-08-30 19:57:52,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 135 transitions, 1486 flow. Second operand has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:52,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:52,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-08-30 19:57:52,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:53,133 INFO L130 PetriNetUnfolder]: 564/1011 cut-off events. [2023-08-30 19:57:53,133 INFO L131 PetriNetUnfolder]: For 7180/7180 co-relation queries the response was YES. [2023-08-30 19:57:53,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5706 conditions, 1011 events. 564/1011 cut-off events. For 7180/7180 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4838 event pairs, 139 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 5628. Up to 896 conditions per place. [2023-08-30 19:57:53,140 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 144 selfloop transitions, 26 changer transitions 2/172 dead transitions. [2023-08-30 19:57:53,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 172 transitions, 2082 flow [2023-08-30 19:57:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:57:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:57:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1098 transitions. [2023-08-30 19:57:53,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-08-30 19:57:53,142 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1098 transitions. [2023-08-30 19:57:53,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1098 transitions. [2023-08-30 19:57:53,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:53,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1098 transitions. [2023-08-30 19:57:53,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:53,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:53,147 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:53,147 INFO L175 Difference]: Start difference. First operand has 143 places, 135 transitions, 1486 flow. Second operand 14 states and 1098 transitions. [2023-08-30 19:57:53,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 172 transitions, 2082 flow [2023-08-30 19:57:53,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1928 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-08-30 19:57:53,176 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 1510 flow [2023-08-30 19:57:53,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1510, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2023-08-30 19:57:53,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-08-30 19:57:53,177 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 1510 flow [2023-08-30 19:57:53,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:53,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:53,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:53,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:53,383 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:53,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash 700261641, now seen corresponding path program 18 times [2023-08-30 19:57:53,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:53,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941061587] [2023-08-30 19:57:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:53,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941061587] [2023-08-30 19:57:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941061587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804336928] [2023-08-30 19:57:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:57:53,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:53,917 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) [2023-08-30 19:57:53,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 19:57:54,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:57:54,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:57:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:54,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:54,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:54,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-08-30 19:57:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804336928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:54,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:54,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-30 19:57:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744270894] [2023-08-30 19:57:54,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:54,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:57:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:57:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:57:55,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-08-30 19:57:55,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 1510 flow. Second operand has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:55,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:55,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-08-30 19:57:55,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:55,488 INFO L130 PetriNetUnfolder]: 598/1070 cut-off events. [2023-08-30 19:57:55,489 INFO L131 PetriNetUnfolder]: For 7340/7340 co-relation queries the response was YES. [2023-08-30 19:57:55,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5983 conditions, 1070 events. 598/1070 cut-off events. For 7340/7340 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5177 event pairs, 161 based on Foata normal form. 1/1070 useless extension candidates. Maximal degree in co-relation 5902. Up to 967 conditions per place. [2023-08-30 19:57:55,497 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 129 selfloop transitions, 38 changer transitions 1/168 dead transitions. [2023-08-30 19:57:55,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 168 transitions, 2118 flow [2023-08-30 19:57:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:57:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:57:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1192 transitions. [2023-08-30 19:57:55,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857605177993528 [2023-08-30 19:57:55,501 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1192 transitions. [2023-08-30 19:57:55,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1192 transitions. [2023-08-30 19:57:55,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:55,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1192 transitions. [2023-08-30 19:57:55,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 79.46666666666667) internal successors, (1192), 15 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:55,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:55,506 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:55,506 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 1510 flow. Second operand 15 states and 1192 transitions. [2023-08-30 19:57:55,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 168 transitions, 2118 flow [2023-08-30 19:57:55,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 168 transitions, 2000 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-08-30 19:57:55,538 INFO L231 Difference]: Finished difference. Result has 158 places, 147 transitions, 1695 flow [2023-08-30 19:57:55,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1695, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2023-08-30 19:57:55,539 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-08-30 19:57:55,539 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 1695 flow [2023-08-30 19:57:55,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:55,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:55,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:55,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 19:57:55,745 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:55,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 687923611, now seen corresponding path program 19 times [2023-08-30 19:57:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883653099] [2023-08-30 19:57:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883653099] [2023-08-30 19:57:56,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883653099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510327833] [2023-08-30 19:57:56,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:57:56,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:56,241 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) [2023-08-30 19:57:56,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 19:57:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-30 19:57:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:57:56,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:56,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:56,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:57:56,698 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:57:56,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:57:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510327833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:56,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-08-30 19:57:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448566754] [2023-08-30 19:57:56,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:57:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:57:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:57:57,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-08-30 19:57:57,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 1695 flow. Second operand has 25 states, 25 states have (on average 75.04) internal successors, (1876), 25 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:57,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:57,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-08-30 19:57:57,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:57,998 INFO L130 PetriNetUnfolder]: 686/1229 cut-off events. [2023-08-30 19:57:57,998 INFO L131 PetriNetUnfolder]: For 10859/10859 co-relation queries the response was YES. [2023-08-30 19:57:58,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1229 events. 686/1229 cut-off events. For 10859/10859 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6249 event pairs, 171 based on Foata normal form. 3/1231 useless extension candidates. Maximal degree in co-relation 7185. Up to 1062 conditions per place. [2023-08-30 19:57:58,008 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 175 selfloop transitions, 32 changer transitions 3/210 dead transitions. [2023-08-30 19:57:58,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 210 transitions, 2743 flow [2023-08-30 19:57:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:57:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:57:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1339 transitions. [2023-08-30 19:57:58,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2023-08-30 19:57:58,011 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1339 transitions. [2023-08-30 19:57:58,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1339 transitions. [2023-08-30 19:57:58,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:58,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1339 transitions. [2023-08-30 19:57:58,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 78.76470588235294) internal successors, (1339), 17 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:58,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:58,017 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:58,017 INFO L175 Difference]: Start difference. First operand has 158 places, 147 transitions, 1695 flow. Second operand 17 states and 1339 transitions. [2023-08-30 19:57:58,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 210 transitions, 2743 flow [2023-08-30 19:57:58,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2543 flow, removed 78 selfloop flow, removed 9 redundant places. [2023-08-30 19:57:58,053 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 2012 flow [2023-08-30 19:57:58,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2012, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2023-08-30 19:57:58,054 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2023-08-30 19:57:58,054 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 2012 flow [2023-08-30 19:57:58,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.04) internal successors, (1876), 25 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:58,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:57:58,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:57:58,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 19:57:58,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 19:57:58,260 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:57:58,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:57:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1655123187, now seen corresponding path program 20 times [2023-08-30 19:57:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:57:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638313989] [2023-08-30 19:57:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:57:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:57:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:57:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:57:58,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:57:58,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638313989] [2023-08-30 19:57:58,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638313989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:57:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366259302] [2023-08-30 19:57:58,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:57:58,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:57:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:57:58,789 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) [2023-08-30 19:57:58,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 19:57:58,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:57:58,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:57:58,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:57:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:57:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:57:59,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:57:59,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:57:59,251 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:57:59,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:57:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:57:59,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366259302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:57:59,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:57:59,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-30 19:57:59,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152717072] [2023-08-30 19:57:59,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:57:59,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:57:59,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:57:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:57:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:57:59,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-08-30 19:57:59,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 2012 flow. Second operand has 24 states, 24 states have (on average 74.95833333333333) internal successors, (1799), 24 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:57:59,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:57:59,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-08-30 19:57:59,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:00,360 INFO L130 PetriNetUnfolder]: 740/1327 cut-off events. [2023-08-30 19:58:00,360 INFO L131 PetriNetUnfolder]: For 13286/13286 co-relation queries the response was YES. [2023-08-30 19:58:00,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8055 conditions, 1327 events. 740/1327 cut-off events. For 13286/13286 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6872 event pairs, 199 based on Foata normal form. 2/1328 useless extension candidates. Maximal degree in co-relation 7964. Up to 1180 conditions per place. [2023-08-30 19:58:00,371 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 173 selfloop transitions, 32 changer transitions 3/208 dead transitions. [2023-08-30 19:58:00,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 208 transitions, 2864 flow [2023-08-30 19:58:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:58:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:58:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1178 transitions. [2023-08-30 19:58:00,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812297734627832 [2023-08-30 19:58:00,374 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1178 transitions. [2023-08-30 19:58:00,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1178 transitions. [2023-08-30 19:58:00,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:00,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1178 transitions. [2023-08-30 19:58:00,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.53333333333333) internal successors, (1178), 15 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:00,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:00,379 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:00,379 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 2012 flow. Second operand 15 states and 1178 transitions. [2023-08-30 19:58:00,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 208 transitions, 2864 flow [2023-08-30 19:58:00,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 208 transitions, 2499 flow, removed 171 selfloop flow, removed 7 redundant places. [2023-08-30 19:58:00,424 INFO L231 Difference]: Finished difference. Result has 179 places, 170 transitions, 1995 flow [2023-08-30 19:58:00,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1995, PETRI_PLACES=179, PETRI_TRANSITIONS=170} [2023-08-30 19:58:00,425 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2023-08-30 19:58:00,425 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 170 transitions, 1995 flow [2023-08-30 19:58:00,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.95833333333333) internal successors, (1799), 24 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:00,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:00,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:00,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:00,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:00,631 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:00,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2101988531, now seen corresponding path program 21 times [2023-08-30 19:58:00,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:00,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365667250] [2023-08-30 19:58:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365667250] [2023-08-30 19:58:01,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365667250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275615271] [2023-08-30 19:58:01,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:58:01,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:01,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:01,168 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) [2023-08-30 19:58:01,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 19:58:01,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:58:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:58:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:01,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:01,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:01,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:58:01,529 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:58:01,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:58:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275615271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:01,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:01,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-08-30 19:58:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359443324] [2023-08-30 19:58:01,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:01,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:58:01,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:58:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:58:02,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-08-30 19:58:02,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 170 transitions, 1995 flow. Second operand has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:02,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:02,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-08-30 19:58:02,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:02,608 INFO L130 PetriNetUnfolder]: 794/1425 cut-off events. [2023-08-30 19:58:02,608 INFO L131 PetriNetUnfolder]: For 14092/14092 co-relation queries the response was YES. [2023-08-30 19:58:02,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8334 conditions, 1425 events. 794/1425 cut-off events. For 14092/14092 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7536 event pairs, 227 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 8239. Up to 1317 conditions per place. [2023-08-30 19:58:02,617 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 180 selfloop transitions, 24 changer transitions 2/206 dead transitions. [2023-08-30 19:58:02,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 206 transitions, 2825 flow [2023-08-30 19:58:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:58:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:58:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1070 transitions. [2023-08-30 19:58:02,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955190440627336 [2023-08-30 19:58:02,619 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1070 transitions. [2023-08-30 19:58:02,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1070 transitions. [2023-08-30 19:58:02,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:02,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1070 transitions. [2023-08-30 19:58:02,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 82.3076923076923) internal successors, (1070), 13 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:02,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 206.0) internal successors, (2884), 14 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:02,624 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 206.0) internal successors, (2884), 14 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:02,624 INFO L175 Difference]: Start difference. First operand has 179 places, 170 transitions, 1995 flow. Second operand 13 states and 1070 transitions. [2023-08-30 19:58:02,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 206 transitions, 2825 flow [2023-08-30 19:58:02,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 206 transitions, 2594 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-08-30 19:58:02,665 INFO L231 Difference]: Finished difference. Result has 185 places, 178 transitions, 2109 flow [2023-08-30 19:58:02,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2109, PETRI_PLACES=185, PETRI_TRANSITIONS=178} [2023-08-30 19:58:02,666 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-08-30 19:58:02,666 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 178 transitions, 2109 flow [2023-08-30 19:58:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:02,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-30 19:58:02,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:02,867 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:02,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 556637051, now seen corresponding path program 22 times [2023-08-30 19:58:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:02,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203410367] [2023-08-30 19:58:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:02,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:03,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203410367] [2023-08-30 19:58:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203410367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202514972] [2023-08-30 19:58:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:58:03,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:03,273 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:03,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 19:58:03,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:58:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:03,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:58:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:03,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:03,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:03,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-08-30 19:58:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202514972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:03,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:03,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-08-30 19:58:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539281914] [2023-08-30 19:58:03,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:58:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:58:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:58:03,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:58:03,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 178 transitions, 2109 flow. Second operand has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:03,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:03,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:58:03,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:04,417 INFO L130 PetriNetUnfolder]: 848/1523 cut-off events. [2023-08-30 19:58:04,418 INFO L131 PetriNetUnfolder]: For 15118/15118 co-relation queries the response was YES. [2023-08-30 19:58:04,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 1523 events. 848/1523 cut-off events. For 15118/15118 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8215 event pairs, 251 based on Foata normal form. 2/1524 useless extension candidates. Maximal degree in co-relation 8852. Up to 1403 conditions per place. [2023-08-30 19:58:04,432 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 185 selfloop transitions, 30 changer transitions 2/217 dead transitions. [2023-08-30 19:58:04,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 217 transitions, 2987 flow [2023-08-30 19:58:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:58:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:58:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1253 transitions. [2023-08-30 19:58:04,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344660194174757 [2023-08-30 19:58:04,434 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1253 transitions. [2023-08-30 19:58:04,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1253 transitions. [2023-08-30 19:58:04,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:04,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1253 transitions. [2023-08-30 19:58:04,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.5) internal successors, (1253), 14 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:04,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:04,438 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:04,439 INFO L175 Difference]: Start difference. First operand has 185 places, 178 transitions, 2109 flow. Second operand 14 states and 1253 transitions. [2023-08-30 19:58:04,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 217 transitions, 2987 flow [2023-08-30 19:58:04,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 217 transitions, 2734 flow, removed 115 selfloop flow, removed 7 redundant places. [2023-08-30 19:58:04,486 INFO L231 Difference]: Finished difference. Result has 194 places, 186 transitions, 2229 flow [2023-08-30 19:58:04,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2229, PETRI_PLACES=194, PETRI_TRANSITIONS=186} [2023-08-30 19:58:04,487 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 173 predicate places. [2023-08-30 19:58:04,487 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 186 transitions, 2229 flow [2023-08-30 19:58:04,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:04,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:04,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:04,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:04,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 19:58:04,693 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:04,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -16642011, now seen corresponding path program 23 times [2023-08-30 19:58:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356759587] [2023-08-30 19:58:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:04,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356759587] [2023-08-30 19:58:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356759587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:05,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300566150] [2023-08-30 19:58:05,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:58:05,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:05,341 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:05,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 19:58:05,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:58:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:58:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:05,591 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:58:05,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:05,593 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 31 treesize of output 14 [2023-08-30 19:58:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:05,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:05,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:05,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-08-30 19:58:05,750 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 19:58:05,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-08-30 19:58:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300566150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:05,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-08-30 19:58:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573134669] [2023-08-30 19:58:05,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:05,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:58:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:58:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:58:06,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-08-30 19:58:06,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 186 transitions, 2229 flow. Second operand has 19 states, 19 states have (on average 79.10526315789474) internal successors, (1503), 19 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:06,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:06,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-08-30 19:58:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:06,718 INFO L130 PetriNetUnfolder]: 904/1625 cut-off events. [2023-08-30 19:58:06,718 INFO L131 PetriNetUnfolder]: For 17703/17703 co-relation queries the response was YES. [2023-08-30 19:58:06,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9584 conditions, 1625 events. 904/1625 cut-off events. For 17703/17703 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8930 event pairs, 261 based on Foata normal form. 2/1626 useless extension candidates. Maximal degree in co-relation 9483. Up to 1478 conditions per place. [2023-08-30 19:58:06,729 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 197 selfloop transitions, 32 changer transitions 3/232 dead transitions. [2023-08-30 19:58:06,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 232 transitions, 3183 flow [2023-08-30 19:58:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:58:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:58:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1238 transitions. [2023-08-30 19:58:06,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006472491909385 [2023-08-30 19:58:06,742 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1238 transitions. [2023-08-30 19:58:06,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1238 transitions. [2023-08-30 19:58:06,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:06,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1238 transitions. [2023-08-30 19:58:06,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 82.53333333333333) internal successors, (1238), 15 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:06,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:06,747 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:06,747 INFO L175 Difference]: Start difference. First operand has 194 places, 186 transitions, 2229 flow. Second operand 15 states and 1238 transitions. [2023-08-30 19:58:06,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 232 transitions, 3183 flow [2023-08-30 19:58:06,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 232 transitions, 2906 flow, removed 123 selfloop flow, removed 8 redundant places. [2023-08-30 19:58:06,823 INFO L231 Difference]: Finished difference. Result has 203 places, 194 transitions, 2342 flow [2023-08-30 19:58:06,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2342, PETRI_PLACES=203, PETRI_TRANSITIONS=194} [2023-08-30 19:58:06,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 182 predicate places. [2023-08-30 19:58:06,829 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 194 transitions, 2342 flow [2023-08-30 19:58:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.10526315789474) internal successors, (1503), 19 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:06,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:06,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:06,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:07,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 19:58:07,035 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:07,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1652983725, now seen corresponding path program 24 times [2023-08-30 19:58:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:07,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369251325] [2023-08-30 19:58:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369251325] [2023-08-30 19:58:07,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369251325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424511962] [2023-08-30 19:58:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:58:07,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:07,518 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:07,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 19:58:07,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:58:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 19:58:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:07,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:07,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:07,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-08-30 19:58:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:07,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424511962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:07,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:07,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-30 19:58:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659559559] [2023-08-30 19:58:07,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:07,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:58:07,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:58:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:58:08,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-08-30 19:58:08,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 194 transitions, 2342 flow. Second operand has 25 states, 25 states have (on average 75.0) internal successors, (1875), 25 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:08,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:08,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-08-30 19:58:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:09,509 INFO L130 PetriNetUnfolder]: 973/1749 cut-off events. [2023-08-30 19:58:09,509 INFO L131 PetriNetUnfolder]: For 21181/21181 co-relation queries the response was YES. [2023-08-30 19:58:09,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10399 conditions, 1749 events. 973/1749 cut-off events. For 21181/21181 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9771 event pairs, 284 based on Foata normal form. 2/1750 useless extension candidates. Maximal degree in co-relation 10292. Up to 1577 conditions per place. [2023-08-30 19:58:09,521 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 204 selfloop transitions, 51 changer transitions 3/258 dead transitions. [2023-08-30 19:58:09,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 258 transitions, 3514 flow [2023-08-30 19:58:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:58:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:58:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1716 transitions. [2023-08-30 19:58:09,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786407766990291 [2023-08-30 19:58:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1716 transitions. [2023-08-30 19:58:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1716 transitions. [2023-08-30 19:58:09,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:09,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1716 transitions. [2023-08-30 19:58:09,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:09,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:09,530 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:09,530 INFO L175 Difference]: Start difference. First operand has 203 places, 194 transitions, 2342 flow. Second operand 22 states and 1716 transitions. [2023-08-30 19:58:09,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 258 transitions, 3514 flow [2023-08-30 19:58:09,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 258 transitions, 3259 flow, removed 111 selfloop flow, removed 9 redundant places. [2023-08-30 19:58:09,612 INFO L231 Difference]: Finished difference. Result has 221 places, 213 transitions, 2688 flow [2023-08-30 19:58:09,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2688, PETRI_PLACES=221, PETRI_TRANSITIONS=213} [2023-08-30 19:58:09,613 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-08-30 19:58:09,613 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 213 transitions, 2688 flow [2023-08-30 19:58:09,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.0) internal successors, (1875), 25 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:09,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:09,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:09,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 19:58:09,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:58:09,819 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:09,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -296912589, now seen corresponding path program 25 times [2023-08-30 19:58:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:09,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829065305] [2023-08-30 19:58:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:09,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:10,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:10,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829065305] [2023-08-30 19:58:10,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829065305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:10,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791522970] [2023-08-30 19:58:10,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:58:10,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:10,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:10,408 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:10,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 19:58:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-30 19:58:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:10,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 19:58:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:10,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:10,889 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_923 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_923) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1)) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2))))) (forall ((v_ArrVal_923 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_923) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2)) (+ c_~counter~0 (select .cse3 .cse1) 1)))))) is different from false [2023-08-30 19:58:10,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:10,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-08-30 19:58:10,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:10,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 31 [2023-08-30 19:58:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:58:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:11,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791522970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:11,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:11,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-30 19:58:11,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621199916] [2023-08-30 19:58:11,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:58:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:58:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=719, Unknown=1, NotChecked=54, Total=870 [2023-08-30 19:58:11,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-08-30 19:58:11,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 213 transitions, 2688 flow. Second operand has 30 states, 30 states have (on average 57.6) internal successors, (1728), 30 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:11,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:11,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-08-30 19:58:11,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:12,266 INFO L130 PetriNetUnfolder]: 1043/1876 cut-off events. [2023-08-30 19:58:12,267 INFO L131 PetriNetUnfolder]: For 24401/24401 co-relation queries the response was YES. [2023-08-30 19:58:12,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11422 conditions, 1876 events. 1043/1876 cut-off events. For 24401/24401 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10628 event pairs, 288 based on Foata normal form. 1/1876 useless extension candidates. Maximal degree in co-relation 11308. Up to 1589 conditions per place. [2023-08-30 19:58:12,277 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 198 selfloop transitions, 67 changer transitions 1/266 dead transitions. [2023-08-30 19:58:12,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 266 transitions, 3903 flow [2023-08-30 19:58:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:58:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:58:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1162 transitions. [2023-08-30 19:58:12,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2968829841594277 [2023-08-30 19:58:12,280 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1162 transitions. [2023-08-30 19:58:12,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1162 transitions. [2023-08-30 19:58:12,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:12,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1162 transitions. [2023-08-30 19:58:12,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.1578947368421) internal successors, (1162), 19 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:12,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:12,284 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:12,284 INFO L175 Difference]: Start difference. First operand has 221 places, 213 transitions, 2688 flow. Second operand 19 states and 1162 transitions. [2023-08-30 19:58:12,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 266 transitions, 3903 flow [2023-08-30 19:58:12,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 266 transitions, 3575 flow, removed 140 selfloop flow, removed 13 redundant places. [2023-08-30 19:58:12,363 INFO L231 Difference]: Finished difference. Result has 230 places, 225 transitions, 2969 flow [2023-08-30 19:58:12,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2969, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2023-08-30 19:58:12,364 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 209 predicate places. [2023-08-30 19:58:12,364 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 2969 flow [2023-08-30 19:58:12,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 57.6) internal successors, (1728), 30 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:12,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:12,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:12,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:12,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:12,570 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:12,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1732503731, now seen corresponding path program 26 times [2023-08-30 19:58:12,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:12,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884817131] [2023-08-30 19:58:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:12,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:13,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:13,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884817131] [2023-08-30 19:58:13,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884817131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:13,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303357953] [2023-08-30 19:58:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:58:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:13,249 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:13,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 19:58:13,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:58:13,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:13,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-30 19:58:13,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:13,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 19:58:13,719 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:58:13,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:13,720 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 15 treesize of output 9 [2023-08-30 19:58:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:13,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:13,962 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_149| Int) (v_ArrVal_958 (Array Int Int))) (or (< |v_thread2Thread1of1ForFork1_~i~1#1_149| 1) (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_149|) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_958) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_149| 4)))))))) (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_149| Int) (v_ArrVal_958 (Array Int Int))) (or (< |v_thread2Thread1of1ForFork1_~i~1#1_149| 1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_958) c_~A~0.base))) (< (+ (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_149| 4)))) (+ (select .cse2 .cse1) c_~counter~0 1))) (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_149|))))) is different from false [2023-08-30 19:58:14,006 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 19:58:14,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 79 [2023-08-30 19:58:14,026 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 19:58:14,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 34 [2023-08-30 19:58:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:58:14,126 INFO L321 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-30 19:58:14,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 17 [2023-08-30 19:58:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:14,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303357953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:14,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:14,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2023-08-30 19:58:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46387082] [2023-08-30 19:58:14,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:14,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 19:58:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 19:58:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=944, Unknown=1, NotChecked=62, Total=1122 [2023-08-30 19:58:14,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-08-30 19:58:14,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 2969 flow. Second operand has 34 states, 34 states have (on average 57.588235294117645) internal successors, (1958), 34 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:14,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:14,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-08-30 19:58:14,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:16,625 INFO L130 PetriNetUnfolder]: 1550/2890 cut-off events. [2023-08-30 19:58:16,625 INFO L131 PetriNetUnfolder]: For 45341/45341 co-relation queries the response was YES. [2023-08-30 19:58:16,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18179 conditions, 2890 events. 1550/2890 cut-off events. For 45341/45341 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18887 event pairs, 106 based on Foata normal form. 5/2893 useless extension candidates. Maximal degree in co-relation 17341. Up to 1209 conditions per place. [2023-08-30 19:58:16,643 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 230 selfloop transitions, 249 changer transitions 7/486 dead transitions. [2023-08-30 19:58:16,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 486 transitions, 7418 flow [2023-08-30 19:58:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 19:58:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 19:58:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2123 transitions. [2023-08-30 19:58:16,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2944521497919556 [2023-08-30 19:58:16,646 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2123 transitions. [2023-08-30 19:58:16,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2123 transitions. [2023-08-30 19:58:16,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:16,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2123 transitions. [2023-08-30 19:58:16,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.65714285714286) internal successors, (2123), 35 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:16,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:16,652 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:16,653 INFO L175 Difference]: Start difference. First operand has 230 places, 225 transitions, 2969 flow. Second operand 35 states and 2123 transitions. [2023-08-30 19:58:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 486 transitions, 7418 flow [2023-08-30 19:58:16,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 486 transitions, 6478 flow, removed 405 selfloop flow, removed 13 redundant places. [2023-08-30 19:58:16,774 INFO L231 Difference]: Finished difference. Result has 258 places, 413 transitions, 6012 flow [2023-08-30 19:58:16,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6012, PETRI_PLACES=258, PETRI_TRANSITIONS=413} [2023-08-30 19:58:16,775 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-08-30 19:58:16,775 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 413 transitions, 6012 flow [2023-08-30 19:58:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 57.588235294117645) internal successors, (1958), 34 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:16,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:16,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:16,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:16,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:16,976 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:16,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash -889712508, now seen corresponding path program 27 times [2023-08-30 19:58:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:16,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185783992] [2023-08-30 19:58:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:17,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185783992] [2023-08-30 19:58:17,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185783992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:17,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009589106] [2023-08-30 19:58:17,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:58:17,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:17,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:17,102 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:17,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 19:58:17,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:58:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:58:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:17,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009589106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:17,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:17,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 19:58:17,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710397482] [2023-08-30 19:58:17,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:58:17,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:58:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:58:17,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 206 [2023-08-30 19:58:17,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 413 transitions, 6012 flow. Second operand has 21 states, 21 states have (on average 82.42857142857143) internal successors, (1731), 21 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:17,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:17,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 206 [2023-08-30 19:58:17,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:18,541 INFO L130 PetriNetUnfolder]: 1829/3472 cut-off events. [2023-08-30 19:58:18,541 INFO L131 PetriNetUnfolder]: For 48609/48609 co-relation queries the response was YES. [2023-08-30 19:58:18,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22798 conditions, 3472 events. 1829/3472 cut-off events. For 48609/48609 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23606 event pairs, 803 based on Foata normal form. 210/3681 useless extension candidates. Maximal degree in co-relation 21773. Up to 2292 conditions per place. [2023-08-30 19:58:18,565 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 431 selfloop transitions, 187 changer transitions 0/618 dead transitions. [2023-08-30 19:58:18,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 618 transitions, 9990 flow [2023-08-30 19:58:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:58:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:58:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1792 transitions. [2023-08-30 19:58:18,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41423948220064727 [2023-08-30 19:58:18,568 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1792 transitions. [2023-08-30 19:58:18,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1792 transitions. [2023-08-30 19:58:18,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:18,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1792 transitions. [2023-08-30 19:58:18,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.33333333333333) internal successors, (1792), 21 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:18,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:18,573 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:18,573 INFO L175 Difference]: Start difference. First operand has 258 places, 413 transitions, 6012 flow. Second operand 21 states and 1792 transitions. [2023-08-30 19:58:18,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 618 transitions, 9990 flow [2023-08-30 19:58:18,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 618 transitions, 9113 flow, removed 383 selfloop flow, removed 12 redundant places. [2023-08-30 19:58:18,797 INFO L231 Difference]: Finished difference. Result has 279 places, 518 transitions, 7528 flow [2023-08-30 19:58:18,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7528, PETRI_PLACES=279, PETRI_TRANSITIONS=518} [2023-08-30 19:58:18,797 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2023-08-30 19:58:18,798 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 518 transitions, 7528 flow [2023-08-30 19:58:18,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 82.42857142857143) internal successors, (1731), 21 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:18,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:18,798 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:18,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:18,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:18,999 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:18,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:18,999 INFO L85 PathProgramCache]: Analyzing trace with hash 781016959, now seen corresponding path program 28 times [2023-08-30 19:58:18,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:18,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153806493] [2023-08-30 19:58:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:18,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:19,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:19,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153806493] [2023-08-30 19:58:19,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153806493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:19,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293310889] [2023-08-30 19:58:19,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:58:19,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:19,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:19,093 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:19,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 19:58:19,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:58:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:19,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:58:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:19,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:19,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293310889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:19,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:19,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 19:58:19,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672934022] [2023-08-30 19:58:19,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:19,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:58:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:58:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:58:19,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:58:19,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 518 transitions, 7528 flow. Second operand has 19 states, 19 states have (on average 85.89473684210526) internal successors, (1632), 19 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:19,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:19,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:58:19,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:20,295 INFO L130 PetriNetUnfolder]: 1259/2497 cut-off events. [2023-08-30 19:58:20,295 INFO L131 PetriNetUnfolder]: For 41892/41902 co-relation queries the response was YES. [2023-08-30 19:58:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18216 conditions, 2497 events. 1259/2497 cut-off events. For 41892/41902 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16576 event pairs, 342 based on Foata normal form. 180/2665 useless extension candidates. Maximal degree in co-relation 17615. Up to 1074 conditions per place. [2023-08-30 19:58:20,316 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 381 selfloop transitions, 56 changer transitions 32/486 dead transitions. [2023-08-30 19:58:20,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 486 transitions, 8165 flow [2023-08-30 19:58:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:58:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:58:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 895 transitions. [2023-08-30 19:58:20,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344660194174757 [2023-08-30 19:58:20,318 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 895 transitions. [2023-08-30 19:58:20,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 895 transitions. [2023-08-30 19:58:20,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:20,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 895 transitions. [2023-08-30 19:58:20,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.5) internal successors, (895), 10 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:20,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:20,322 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:20,322 INFO L175 Difference]: Start difference. First operand has 279 places, 518 transitions, 7528 flow. Second operand 10 states and 895 transitions. [2023-08-30 19:58:20,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 486 transitions, 8165 flow [2023-08-30 19:58:20,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 486 transitions, 7117 flow, removed 401 selfloop flow, removed 19 redundant places. [2023-08-30 19:58:20,563 INFO L231 Difference]: Finished difference. Result has 269 places, 395 transitions, 5159 flow [2023-08-30 19:58:20,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5159, PETRI_PLACES=269, PETRI_TRANSITIONS=395} [2023-08-30 19:58:20,564 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-08-30 19:58:20,564 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 395 transitions, 5159 flow [2023-08-30 19:58:20,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.89473684210526) internal successors, (1632), 19 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:20,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:20,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:20,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 19:58:20,770 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:20,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2070627118, now seen corresponding path program 29 times [2023-08-30 19:58:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214552083] [2023-08-30 19:58:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:20,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:20,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214552083] [2023-08-30 19:58:20,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214552083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:20,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458362717] [2023-08-30 19:58:20,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:58:20,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:20,858 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:20,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 19:58:20,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:58:20,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:58:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:58:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458362717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:21,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:21,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 19:58:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838671391] [2023-08-30 19:58:21,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:21,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:58:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:58:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:58:21,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-08-30 19:58:21,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 395 transitions, 5159 flow. Second operand has 19 states, 19 states have (on average 85.84210526315789) internal successors, (1631), 19 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:21,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:21,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-08-30 19:58:21,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:21,788 INFO L130 PetriNetUnfolder]: 889/1799 cut-off events. [2023-08-30 19:58:21,788 INFO L131 PetriNetUnfolder]: For 24567/24574 co-relation queries the response was YES. [2023-08-30 19:58:21,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 1799 events. 889/1799 cut-off events. For 24567/24574 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11110 event pairs, 219 based on Foata normal form. 125/1924 useless extension candidates. Maximal degree in co-relation 12678. Up to 782 conditions per place. [2023-08-30 19:58:21,802 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 267 selfloop transitions, 5 changer transitions 103/381 dead transitions. [2023-08-30 19:58:21,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 381 transitions, 5638 flow [2023-08-30 19:58:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:58:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:58:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 894 transitions. [2023-08-30 19:58:21,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43398058252427185 [2023-08-30 19:58:21,803 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 894 transitions. [2023-08-30 19:58:21,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 894 transitions. [2023-08-30 19:58:21,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:21,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 894 transitions. [2023-08-30 19:58:21,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.4) internal successors, (894), 10 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:21,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:21,806 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:21,806 INFO L175 Difference]: Start difference. First operand has 269 places, 395 transitions, 5159 flow. Second operand 10 states and 894 transitions. [2023-08-30 19:58:21,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 381 transitions, 5638 flow [2023-08-30 19:58:21,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 381 transitions, 5321 flow, removed 21 selfloop flow, removed 20 redundant places. [2023-08-30 19:58:21,893 INFO L231 Difference]: Finished difference. Result has 255 places, 270 transitions, 3286 flow [2023-08-30 19:58:21,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3286, PETRI_PLACES=255, PETRI_TRANSITIONS=270} [2023-08-30 19:58:21,893 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2023-08-30 19:58:21,894 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 270 transitions, 3286 flow [2023-08-30 19:58:21,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.84210526315789) internal successors, (1631), 19 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:21,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:21,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:21,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:22,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:22,100 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:22,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash -187941625, now seen corresponding path program 30 times [2023-08-30 19:58:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:22,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620973717] [2023-08-30 19:58:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:22,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:23,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:23,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620973717] [2023-08-30 19:58:23,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620973717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:23,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009732588] [2023-08-30 19:58:23,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:58:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:23,166 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:23,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 19:58:23,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:58:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:23,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-30 19:58:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:23,565 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 20 treesize of output 20 [2023-08-30 19:58:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:23,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:23,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-08-30 19:58:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:25,612 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_2 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1)) (let ((.cse2 (* 4 v_subst_2))) (+ (select .cse0 (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ c_~A~0.offset .cse2)) (select .cse0 c_~A~0.offset))))) (<= c_~N~0 (+ v_subst_2 1)) (< (+ 2 v_subst_2) c_~N~0))) (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_1 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (< (let ((.cse4 (* 4 v_subst_1))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)) (select .cse3 c_~A~0.offset))) (+ c_~counter~0 (select .cse3 .cse1) 1))) (< (+ 2 v_subst_1) c_~N~0) (<= c_~N~0 (+ v_subst_1 1)))))) is different from false [2023-08-30 19:58:25,647 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_2 Int)) (or (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* 4 v_subst_2))) (+ (select .cse1 (+ c_~A~0.offset .cse3 4)) (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset))))) (<= c_~N~0 (+ v_subst_2 1)) (< (+ 2 v_subst_2) c_~N~0))) (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_1 Int)) (or (< (+ 2 v_subst_1) c_~N~0) (<= c_~N~0 (+ v_subst_1 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (< (let ((.cse5 (* 4 v_subst_1))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse4 c_~A~0.offset))) (+ .cse0 c_~counter~0 (select .cse4 .cse2) 1)))))))) is different from false [2023-08-30 19:58:25,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:25,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 154 [2023-08-30 19:58:25,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:25,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 63 [2023-08-30 19:58:26,507 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:58:26,554 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-30 19:58:26,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-30 19:58:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 19:58:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009732588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:26,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 19:58:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403979687] [2023-08-30 19:58:26,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 19:58:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 19:58:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1647, Unknown=2, NotChecked=166, Total=1980 [2023-08-30 19:58:27,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 19:58:27,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 270 transitions, 3286 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:27,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:27,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 19:58:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:29,907 INFO L130 PetriNetUnfolder]: 864/1584 cut-off events. [2023-08-30 19:58:29,907 INFO L131 PetriNetUnfolder]: For 27984/27984 co-relation queries the response was YES. [2023-08-30 19:58:29,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 1584 events. 864/1584 cut-off events. For 27984/27984 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8429 event pairs, 32 based on Foata normal form. 2/1586 useless extension candidates. Maximal degree in co-relation 12225. Up to 891 conditions per place. [2023-08-30 19:58:29,919 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 254 selfloop transitions, 200 changer transitions 9/463 dead transitions. [2023-08-30 19:58:29,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 463 transitions, 6474 flow [2023-08-30 19:58:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 19:58:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 19:58:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2537 transitions. [2023-08-30 19:58:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2798984995586937 [2023-08-30 19:58:29,922 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2537 transitions. [2023-08-30 19:58:29,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2537 transitions. [2023-08-30 19:58:29,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2537 transitions. [2023-08-30 19:58:29,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.65909090909091) internal successors, (2537), 44 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:29,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:29,932 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:29,932 INFO L175 Difference]: Start difference. First operand has 255 places, 270 transitions, 3286 flow. Second operand 44 states and 2537 transitions. [2023-08-30 19:58:29,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 463 transitions, 6474 flow [2023-08-30 19:58:30,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 463 transitions, 5881 flow, removed 50 selfloop flow, removed 36 redundant places. [2023-08-30 19:58:30,019 INFO L231 Difference]: Finished difference. Result has 251 places, 362 transitions, 4956 flow [2023-08-30 19:58:30,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4956, PETRI_PLACES=251, PETRI_TRANSITIONS=362} [2023-08-30 19:58:30,020 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2023-08-30 19:58:30,020 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 362 transitions, 4956 flow [2023-08-30 19:58:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:30,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:30,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:30,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:30,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:30,221 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:30,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash -564186213, now seen corresponding path program 31 times [2023-08-30 19:58:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:30,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428420518] [2023-08-30 19:58:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:31,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428420518] [2023-08-30 19:58:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428420518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451199134] [2023-08-30 19:58:31,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:58:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:31,257 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:31,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 19:58:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 19:58:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:58:31,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:31,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:31,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-30 19:58:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:58:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451199134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:32,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-08-30 19:58:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123820978] [2023-08-30 19:58:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:32,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:58:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:58:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:58:33,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 206 [2023-08-30 19:58:33,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 362 transitions, 4956 flow. Second operand has 32 states, 32 states have (on average 72.78125) internal successors, (2329), 32 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:33,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:33,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 206 [2023-08-30 19:58:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:35,068 INFO L130 PetriNetUnfolder]: 941/1715 cut-off events. [2023-08-30 19:58:35,068 INFO L131 PetriNetUnfolder]: For 29356/29356 co-relation queries the response was YES. [2023-08-30 19:58:35,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13908 conditions, 1715 events. 941/1715 cut-off events. For 29356/29356 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9309 event pairs, 144 based on Foata normal form. 1/1716 useless extension candidates. Maximal degree in co-relation 13784. Up to 1401 conditions per place. [2023-08-30 19:58:35,085 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 297 selfloop transitions, 134 changer transitions 1/432 dead transitions. [2023-08-30 19:58:35,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 6683 flow [2023-08-30 19:58:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 19:58:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 19:58:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1881 transitions. [2023-08-30 19:58:35,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36524271844660194 [2023-08-30 19:58:35,089 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1881 transitions. [2023-08-30 19:58:35,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1881 transitions. [2023-08-30 19:58:35,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:35,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1881 transitions. [2023-08-30 19:58:35,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.24) internal successors, (1881), 25 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:35,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:35,096 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:35,096 INFO L175 Difference]: Start difference. First operand has 251 places, 362 transitions, 4956 flow. Second operand 25 states and 1881 transitions. [2023-08-30 19:58:35,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 6683 flow [2023-08-30 19:58:35,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 432 transitions, 5871 flow, removed 369 selfloop flow, removed 11 redundant places. [2023-08-30 19:58:35,177 INFO L231 Difference]: Finished difference. Result has 271 places, 395 transitions, 5188 flow [2023-08-30 19:58:35,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5188, PETRI_PLACES=271, PETRI_TRANSITIONS=395} [2023-08-30 19:58:35,178 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2023-08-30 19:58:35,178 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 395 transitions, 5188 flow [2023-08-30 19:58:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 72.78125) internal successors, (2329), 32 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:35,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:35,178 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:35,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 19:58:35,379 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:35,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 966993389, now seen corresponding path program 32 times [2023-08-30 19:58:35,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:35,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171175397] [2023-08-30 19:58:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:35,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:36,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171175397] [2023-08-30 19:58:36,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171175397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:36,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265697879] [2023-08-30 19:58:36,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:58:36,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:36,464 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:36,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 19:58:36,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:58:36,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 19:58:36,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:36,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:36,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-08-30 19:58:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:37,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:37,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:37,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 114 [2023-08-30 19:58:38,708 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-30 19:58:38,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 65 [2023-08-30 19:58:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265697879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:39,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:39,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-30 19:58:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587153827] [2023-08-30 19:58:39,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 19:58:39,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:39,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 19:58:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 19:58:43,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 19:58:43,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 395 transitions, 5188 flow. Second operand has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:43,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:58:43,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 19:58:43,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:58:48,147 INFO L130 PetriNetUnfolder]: 1095/1988 cut-off events. [2023-08-30 19:58:48,147 INFO L131 PetriNetUnfolder]: For 30088/30088 co-relation queries the response was YES. [2023-08-30 19:58:48,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15829 conditions, 1988 events. 1095/1988 cut-off events. For 30088/30088 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11074 event pairs, 82 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 15603. Up to 1230 conditions per place. [2023-08-30 19:58:48,163 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 323 selfloop transitions, 261 changer transitions 9/593 dead transitions. [2023-08-30 19:58:48,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 593 transitions, 8564 flow [2023-08-30 19:58:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-30 19:58:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-30 19:58:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5107 transitions. [2023-08-30 19:58:48,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34917270613975115 [2023-08-30 19:58:48,171 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5107 transitions. [2023-08-30 19:58:48,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5107 transitions. [2023-08-30 19:58:48,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:58:48,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5107 transitions. [2023-08-30 19:58:48,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 71.92957746478874) internal successors, (5107), 71 states have internal predecessors, (5107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:48,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 206.0) internal successors, (14832), 72 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:48,191 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 206.0) internal successors, (14832), 72 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:48,191 INFO L175 Difference]: Start difference. First operand has 271 places, 395 transitions, 5188 flow. Second operand 71 states and 5107 transitions. [2023-08-30 19:58:48,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 593 transitions, 8564 flow [2023-08-30 19:58:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 593 transitions, 8013 flow, removed 189 selfloop flow, removed 12 redundant places. [2023-08-30 19:58:48,320 INFO L231 Difference]: Finished difference. Result has 337 places, 478 transitions, 6934 flow [2023-08-30 19:58:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=6934, PETRI_PLACES=337, PETRI_TRANSITIONS=478} [2023-08-30 19:58:48,321 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2023-08-30 19:58:48,321 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 478 transitions, 6934 flow [2023-08-30 19:58:48,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:58:48,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:48,321 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:48,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 19:58:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 19:58:48,522 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:58:48,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1143816677, now seen corresponding path program 33 times [2023-08-30 19:58:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:48,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552414123] [2023-08-30 19:58:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:49,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552414123] [2023-08-30 19:58:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552414123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:49,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099394041] [2023-08-30 19:58:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:58:49,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:49,472 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:49,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 19:58:49,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:58:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-30 19:58:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:49,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:58:49,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:58:49,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:58:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:50,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:50,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-08-30 19:58:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:50,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:53,691 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1221 (Array Int Int)) (v_subst_5 Int)) (or (< (+ 2 v_subst_5) c_~N~0) (<= c_~N~0 (+ v_subst_5 1)) (forall ((v_subst_8 Int)) (or (<= c_~N~0 v_subst_8) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221) c_~A~0.base))) (< (let ((.cse1 (* 4 v_subst_5))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) (select .cse0 (+ c_~A~0.offset 4 .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_8))) 1))) (< (+ v_subst_8 1) c_~N~0))))) (forall ((v_subst_6 Int) (v_ArrVal_1221 (Array Int Int))) (or (<= c_~N~0 (+ v_subst_6 1)) (< (+ 2 v_subst_6) c_~N~0) (forall ((v_subst_7 Int)) (or (< (+ v_subst_7 1) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse3 .cse2) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_7)))) (let ((.cse4 (* 4 v_subst_6))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)))))) (<= c_~N~0 v_subst_7))))))) is different from false [2023-08-30 19:58:59,890 WARN L222 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:58:59,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:59,930 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 111 treesize of output 76 [2023-08-30 19:58:59,955 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 19:58:59,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 151 [2023-08-30 19:58:59,981 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 19:58:59,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 102 [2023-08-30 19:59:00,018 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 19:59:00,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 48 [2023-08-30 19:59:00,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:00,122 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 112 treesize of output 77 [2023-08-30 19:59:00,138 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-30 19:59:00,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 143 [2023-08-30 19:59:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:59:00,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:59:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:59:00,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 51 [2023-08-30 19:59:00,177 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-30 19:59:00,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 66 [2023-08-30 19:59:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099394041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:00,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:00,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-08-30 19:59:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491063098] [2023-08-30 19:59:00,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 19:59:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 19:59:00,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1872, Unknown=1, NotChecked=88, Total=2162 [2023-08-30 19:59:00,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 19:59:00,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 478 transitions, 6934 flow. Second operand has 47 states, 47 states have (on average 54.38297872340426) internal successors, (2556), 47 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:00,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:00,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 19:59:00,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:05,369 INFO L130 PetriNetUnfolder]: 1151/2096 cut-off events. [2023-08-30 19:59:05,370 INFO L131 PetriNetUnfolder]: For 38646/38646 co-relation queries the response was YES. [2023-08-30 19:59:05,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17503 conditions, 2096 events. 1151/2096 cut-off events. For 38646/38646 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11877 event pairs, 88 based on Foata normal form. 2/2098 useless extension candidates. Maximal degree in co-relation 17357. Up to 1161 conditions per place. [2023-08-30 19:59:05,387 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 296 selfloop transitions, 304 changer transitions 10/610 dead transitions. [2023-08-30 19:59:05,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 610 transitions, 9613 flow [2023-08-30 19:59:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-30 19:59:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-30 19:59:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3527 transitions. [2023-08-30 19:59:05,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761509552145318 [2023-08-30 19:59:05,393 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3527 transitions. [2023-08-30 19:59:05,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3527 transitions. [2023-08-30 19:59:05,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:05,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3527 transitions. [2023-08-30 19:59:05,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 56.88709677419355) internal successors, (3527), 62 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:05,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:05,406 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:05,407 INFO L175 Difference]: Start difference. First operand has 337 places, 478 transitions, 6934 flow. Second operand 62 states and 3527 transitions. [2023-08-30 19:59:05,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 610 transitions, 9613 flow [2023-08-30 19:59:05,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 610 transitions, 8810 flow, removed 308 selfloop flow, removed 24 redundant places. [2023-08-30 19:59:05,559 INFO L231 Difference]: Finished difference. Result has 382 places, 513 transitions, 7950 flow [2023-08-30 19:59:05,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7950, PETRI_PLACES=382, PETRI_TRANSITIONS=513} [2023-08-30 19:59:05,560 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-08-30 19:59:05,560 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 513 transitions, 7950 flow [2023-08-30 19:59:05,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.38297872340426) internal successors, (2556), 47 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:05,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:05,561 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:05,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 19:59:05,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 19:59:05,761 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:05,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 228083527, now seen corresponding path program 34 times [2023-08-30 19:59:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738358057] [2023-08-30 19:59:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:06,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738358057] [2023-08-30 19:59:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738358057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891606961] [2023-08-30 19:59:06,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:59:06,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:06,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:06,480 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:06,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 19:59:06,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:59:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:59:06,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 19:59:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:06,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:06,909 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 15 treesize of output 14 [2023-08-30 19:59:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:06,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:07,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:07,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-08-30 19:59:07,989 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-30 19:59:07,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-30 19:59:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:08,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891606961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:08,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-08-30 19:59:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380717443] [2023-08-30 19:59:08,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 19:59:08,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 19:59:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 19:59:11,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-08-30 19:59:11,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 513 transitions, 7950 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:11,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:11,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-08-30 19:59:11,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:13,661 INFO L130 PetriNetUnfolder]: 1306/2371 cut-off events. [2023-08-30 19:59:13,661 INFO L131 PetriNetUnfolder]: For 54364/54364 co-relation queries the response was YES. [2023-08-30 19:59:13,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21271 conditions, 2371 events. 1306/2371 cut-off events. For 54364/54364 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13750 event pairs, 178 based on Foata normal form. 4/2375 useless extension candidates. Maximal degree in co-relation 21146. Up to 1702 conditions per place. [2023-08-30 19:59:13,690 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 363 selfloop transitions, 283 changer transitions 6/652 dead transitions. [2023-08-30 19:59:13,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 652 transitions, 11782 flow [2023-08-30 19:59:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 19:59:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 19:59:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2899 transitions. [2023-08-30 19:59:13,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380346365783259 [2023-08-30 19:59:13,694 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2899 transitions. [2023-08-30 19:59:13,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2899 transitions. [2023-08-30 19:59:13,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:13,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2899 transitions. [2023-08-30 19:59:13,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 78.35135135135135) internal successors, (2899), 37 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:13,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:13,703 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:13,703 INFO L175 Difference]: Start difference. First operand has 382 places, 513 transitions, 7950 flow. Second operand 37 states and 2899 transitions. [2023-08-30 19:59:13,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 652 transitions, 11782 flow [2023-08-30 19:59:13,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 652 transitions, 10723 flow, removed 375 selfloop flow, removed 43 redundant places. [2023-08-30 19:59:13,916 INFO L231 Difference]: Finished difference. Result has 377 places, 587 transitions, 9658 flow [2023-08-30 19:59:13,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9658, PETRI_PLACES=377, PETRI_TRANSITIONS=587} [2023-08-30 19:59:13,917 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 356 predicate places. [2023-08-30 19:59:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 587 transitions, 9658 flow [2023-08-30 19:59:13,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:13,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:13,918 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:13,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-30 19:59:14,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 19:59:14,123 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:14,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2018423441, now seen corresponding path program 35 times [2023-08-30 19:59:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33238126] [2023-08-30 19:59:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33238126] [2023-08-30 19:59:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33238126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149537609] [2023-08-30 19:59:15,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:59:15,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:15,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:15,149 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:15,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 19:59:15,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:59:15,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:59:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 19:59:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:59:15,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:15,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:15,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-30 19:59:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:59:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149537609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:15,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:15,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-30 19:59:15,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065199606] [2023-08-30 19:59:15,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 19:59:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 19:59:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 19:59:17,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 19:59:17,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 587 transitions, 9658 flow. Second operand has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:17,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:17,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 19:59:17,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:20,394 INFO L130 PetriNetUnfolder]: 1463/2655 cut-off events. [2023-08-30 19:59:20,394 INFO L131 PetriNetUnfolder]: For 68853/68853 co-relation queries the response was YES. [2023-08-30 19:59:20,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25155 conditions, 2655 events. 1463/2655 cut-off events. For 68853/68853 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15834 event pairs, 181 based on Foata normal form. 3/2658 useless extension candidates. Maximal degree in co-relation 25030. Up to 1750 conditions per place. [2023-08-30 19:59:20,414 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 363 selfloop transitions, 350 changer transitions 3/716 dead transitions. [2023-08-30 19:59:20,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 716 transitions, 13558 flow [2023-08-30 19:59:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 19:59:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 19:59:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3018 transitions. [2023-08-30 19:59:20,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573289130949562 [2023-08-30 19:59:20,417 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3018 transitions. [2023-08-30 19:59:20,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3018 transitions. [2023-08-30 19:59:20,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:20,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3018 transitions. [2023-08-30 19:59:20,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 73.60975609756098) internal successors, (3018), 41 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:20,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:20,426 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:20,426 INFO L175 Difference]: Start difference. First operand has 377 places, 587 transitions, 9658 flow. Second operand 41 states and 3018 transitions. [2023-08-30 19:59:20,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 716 transitions, 13558 flow [2023-08-30 19:59:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 716 transitions, 12793 flow, removed 260 selfloop flow, removed 26 redundant places. [2023-08-30 19:59:20,665 INFO L231 Difference]: Finished difference. Result has 396 places, 632 transitions, 11471 flow [2023-08-30 19:59:20,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11471, PETRI_PLACES=396, PETRI_TRANSITIONS=632} [2023-08-30 19:59:20,665 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 375 predicate places. [2023-08-30 19:59:20,665 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 632 transitions, 11471 flow [2023-08-30 19:59:20,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:20,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:20,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:20,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-30 19:59:20,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 19:59:20,869 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:20,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1083728057, now seen corresponding path program 36 times [2023-08-30 19:59:20,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:20,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181313019] [2023-08-30 19:59:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181313019] [2023-08-30 19:59:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181313019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430426330] [2023-08-30 19:59:21,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:59:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:21,853 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:21,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 19:59:21,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:59:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:59:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 19:59:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:59:22,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-08-30 19:59:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:22,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:22,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-08-30 19:59:23,590 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-30 19:59:23,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-30 19:59:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:23,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430426330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:23,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:23,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-30 19:59:23,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630776686] [2023-08-30 19:59:23,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:23,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 19:59:23,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 19:59:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 19:59:27,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 19:59:27,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 632 transitions, 11471 flow. Second operand has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:27,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:27,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 19:59:27,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:31,858 INFO L130 PetriNetUnfolder]: 1521/2763 cut-off events. [2023-08-30 19:59:31,858 INFO L131 PetriNetUnfolder]: For 68183/68183 co-relation queries the response was YES. [2023-08-30 19:59:31,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26632 conditions, 2763 events. 1521/2763 cut-off events. For 68183/68183 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16767 event pairs, 118 based on Foata normal form. 2/2765 useless extension candidates. Maximal degree in co-relation 26502. Up to 1856 conditions per place. [2023-08-30 19:59:31,882 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 444 selfloop transitions, 298 changer transitions 11/753 dead transitions. [2023-08-30 19:59:31,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 753 transitions, 14265 flow [2023-08-30 19:59:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-30 19:59:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-30 19:59:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4529 transitions. [2023-08-30 19:59:31,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348975188781014 [2023-08-30 19:59:31,885 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4529 transitions. [2023-08-30 19:59:31,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4529 transitions. [2023-08-30 19:59:31,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:31,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4529 transitions. [2023-08-30 19:59:31,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 71.88888888888889) internal successors, (4529), 63 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:31,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 206.0) internal successors, (13184), 64 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:31,900 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 206.0) internal successors, (13184), 64 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:31,900 INFO L175 Difference]: Start difference. First operand has 396 places, 632 transitions, 11471 flow. Second operand 63 states and 4529 transitions. [2023-08-30 19:59:31,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 753 transitions, 14265 flow [2023-08-30 19:59:32,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 753 transitions, 13022 flow, removed 451 selfloop flow, removed 23 redundant places. [2023-08-30 19:59:32,167 INFO L231 Difference]: Finished difference. Result has 440 places, 652 transitions, 11648 flow [2023-08-30 19:59:32,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=10231, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=11648, PETRI_PLACES=440, PETRI_TRANSITIONS=652} [2023-08-30 19:59:32,168 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 419 predicate places. [2023-08-30 19:59:32,168 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 652 transitions, 11648 flow [2023-08-30 19:59:32,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:32,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:32,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:32,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 19:59:32,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-30 19:59:32,375 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:32,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1638284751, now seen corresponding path program 37 times [2023-08-30 19:59:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:32,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967140671] [2023-08-30 19:59:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:32,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:32,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967140671] [2023-08-30 19:59:32,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967140671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316190107] [2023-08-30 19:59:32,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:59:32,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:32,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:32,937 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:32,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 19:59:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 19:59:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:59:33,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:33,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:33,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-30 19:59:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:59:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316190107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:33,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:33,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 22 [2023-08-30 19:59:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212060055] [2023-08-30 19:59:33,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:59:33,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:33,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:59:33,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:59:34,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 206 [2023-08-30 19:59:34,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 652 transitions, 11648 flow. Second operand has 24 states, 24 states have (on average 84.04166666666667) internal successors, (2017), 24 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:34,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:34,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 206 [2023-08-30 19:59:34,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:35,694 INFO L130 PetriNetUnfolder]: 1618/2957 cut-off events. [2023-08-30 19:59:35,695 INFO L131 PetriNetUnfolder]: For 78648/78648 co-relation queries the response was YES. [2023-08-30 19:59:35,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29218 conditions, 2957 events. 1618/2957 cut-off events. For 78648/78648 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18236 event pairs, 271 based on Foata normal form. 2/2959 useless extension candidates. Maximal degree in co-relation 29082. Up to 2442 conditions per place. [2023-08-30 19:59:35,721 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 551 selfloop transitions, 171 changer transitions 2/724 dead transitions. [2023-08-30 19:59:35,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 724 transitions, 14819 flow [2023-08-30 19:59:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:59:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:59:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1747 transitions. [2023-08-30 19:59:35,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42402912621359223 [2023-08-30 19:59:35,724 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1747 transitions. [2023-08-30 19:59:35,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1747 transitions. [2023-08-30 19:59:35,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:35,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1747 transitions. [2023-08-30 19:59:35,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.35) internal successors, (1747), 20 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:35,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:35,728 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:35,728 INFO L175 Difference]: Start difference. First operand has 440 places, 652 transitions, 11648 flow. Second operand 20 states and 1747 transitions. [2023-08-30 19:59:35,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 724 transitions, 14819 flow [2023-08-30 19:59:36,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 724 transitions, 14128 flow, removed 237 selfloop flow, removed 48 redundant places. [2023-08-30 19:59:36,087 INFO L231 Difference]: Finished difference. Result has 414 places, 674 transitions, 12520 flow [2023-08-30 19:59:36,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=10963, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12520, PETRI_PLACES=414, PETRI_TRANSITIONS=674} [2023-08-30 19:59:36,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 393 predicate places. [2023-08-30 19:59:36,089 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 674 transitions, 12520 flow [2023-08-30 19:59:36,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.04166666666667) internal successors, (2017), 24 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:36,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:36,089 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:36,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 19:59:36,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 19:59:36,295 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:36,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1010617733, now seen corresponding path program 38 times [2023-08-30 19:59:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857305624] [2023-08-30 19:59:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:36,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:37,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:37,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857305624] [2023-08-30 19:59:37,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857305624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:37,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797002959] [2023-08-30 19:59:37,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:59:37,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:37,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:37,246 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:37,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 19:59:37,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:59:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:59:37,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 19:59:37,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:37,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:37,710 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 15 treesize of output 14 [2023-08-30 19:59:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:37,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:38,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:38,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-08-30 19:59:38,680 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-30 19:59:38,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-30 19:59:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:38,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797002959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:38,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:38,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-30 19:59:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369765749] [2023-08-30 19:59:38,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:38,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 19:59:38,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:38,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 19:59:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 19:59:43,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 19:59:43,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 674 transitions, 12520 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:43,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:43,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 19:59:43,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:46,355 INFO L130 PetriNetUnfolder]: 1735/3190 cut-off events. [2023-08-30 19:59:46,355 INFO L131 PetriNetUnfolder]: For 90027/90027 co-relation queries the response was YES. [2023-08-30 19:59:46,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31952 conditions, 3190 events. 1735/3190 cut-off events. For 90027/90027 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20194 event pairs, 281 based on Foata normal form. 6/3196 useless extension candidates. Maximal degree in co-relation 31812. Up to 2471 conditions per place. [2023-08-30 19:59:46,385 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 501 selfloop transitions, 304 changer transitions 6/811 dead transitions. [2023-08-30 19:59:46,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 811 transitions, 16804 flow [2023-08-30 19:59:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 19:59:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 19:59:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3229 transitions. [2023-08-30 19:59:46,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562444836716681 [2023-08-30 19:59:46,389 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3229 transitions. [2023-08-30 19:59:46,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3229 transitions. [2023-08-30 19:59:46,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:46,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3229 transitions. [2023-08-30 19:59:46,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 73.38636363636364) internal successors, (3229), 44 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:46,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:46,399 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:46,399 INFO L175 Difference]: Start difference. First operand has 414 places, 674 transitions, 12520 flow. Second operand 44 states and 3229 transitions. [2023-08-30 19:59:46,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 811 transitions, 16804 flow [2023-08-30 19:59:46,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 811 transitions, 16076 flow, removed 278 selfloop flow, removed 12 redundant places. [2023-08-30 19:59:46,771 INFO L231 Difference]: Finished difference. Result has 452 places, 729 transitions, 14544 flow [2023-08-30 19:59:46,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=11792, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14544, PETRI_PLACES=452, PETRI_TRANSITIONS=729} [2023-08-30 19:59:46,772 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-08-30 19:59:46,772 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 729 transitions, 14544 flow [2023-08-30 19:59:46,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:46,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:46,773 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:46,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 19:59:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-30 19:59:46,973 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:46,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1223489761, now seen corresponding path program 39 times [2023-08-30 19:59:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914346033] [2023-08-30 19:59:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:48,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914346033] [2023-08-30 19:59:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914346033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127453518] [2023-08-30 19:59:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:59:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:48,038 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:48,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 19:59:48,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:59:48,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:59:48,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-30 19:59:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:48,416 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 13 treesize of output 9 [2023-08-30 19:59:48,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:59:48,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:59:48,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:48,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-08-30 19:59:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:59:48,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:59:49,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127453518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:49,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:49,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2023-08-30 19:59:49,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191470111] [2023-08-30 19:59:49,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:49,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 19:59:49,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:49,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 19:59:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 19:59:51,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 19:59:51,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 729 transitions, 14544 flow. Second operand has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:51,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:51,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 19:59:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:59:54,950 INFO L130 PetriNetUnfolder]: 1828/3362 cut-off events. [2023-08-30 19:59:54,950 INFO L131 PetriNetUnfolder]: For 100588/100588 co-relation queries the response was YES. [2023-08-30 19:59:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34540 conditions, 3362 events. 1828/3362 cut-off events. For 100588/100588 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21491 event pairs, 264 based on Foata normal form. 3/3365 useless extension candidates. Maximal degree in co-relation 34392. Up to 2486 conditions per place. [2023-08-30 19:59:54,980 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 471 selfloop transitions, 367 changer transitions 7/845 dead transitions. [2023-08-30 19:59:54,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 845 transitions, 18362 flow [2023-08-30 19:59:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 19:59:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 19:59:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3169 transitions. [2023-08-30 19:59:54,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34962488967343336 [2023-08-30 19:59:54,983 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3169 transitions. [2023-08-30 19:59:54,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3169 transitions. [2023-08-30 19:59:54,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:59:54,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3169 transitions. [2023-08-30 19:59:54,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 72.02272727272727) internal successors, (3169), 44 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:54,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:54,992 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:54,993 INFO L175 Difference]: Start difference. First operand has 452 places, 729 transitions, 14544 flow. Second operand 44 states and 3169 transitions. [2023-08-30 19:59:54,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 845 transitions, 18362 flow [2023-08-30 19:59:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 845 transitions, 17734 flow, removed 229 selfloop flow, removed 27 redundant places. [2023-08-30 19:59:55,437 INFO L231 Difference]: Finished difference. Result has 478 places, 774 transitions, 16458 flow [2023-08-30 19:59:55,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=13924, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16458, PETRI_PLACES=478, PETRI_TRANSITIONS=774} [2023-08-30 19:59:55,438 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 457 predicate places. [2023-08-30 19:59:55,438 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 774 transitions, 16458 flow [2023-08-30 19:59:55,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:59:55,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:59:55,439 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:59:55,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-30 19:59:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:55,645 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:59:55,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:59:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1984083099, now seen corresponding path program 40 times [2023-08-30 19:59:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:59:55,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757734390] [2023-08-30 19:59:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:59:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:59:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:59:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:59:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757734390] [2023-08-30 19:59:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757734390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:59:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279647425] [2023-08-30 19:59:56,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:59:56,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:59:56,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:56,555 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:59:56,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 19:59:56,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:59:56,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:59:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 19:59:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:59:57,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:57,046 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 15 treesize of output 14 [2023-08-30 19:59:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:57,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:59:57,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:59:57,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-30 19:59:58,062 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-30 19:59:58,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-30 19:59:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:59:58,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279647425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:59:58,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:59:58,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-30 19:59:58,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789431629] [2023-08-30 19:59:58,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:59:58,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 19:59:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:59:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 19:59:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 20:00:01,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 20:00:01,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 774 transitions, 16458 flow. Second operand has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:01,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 20:00:01,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:05,378 INFO L130 PetriNetUnfolder]: 1974/3620 cut-off events. [2023-08-30 20:00:05,378 INFO L131 PetriNetUnfolder]: For 132574/132574 co-relation queries the response was YES. [2023-08-30 20:00:05,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40468 conditions, 3620 events. 1974/3620 cut-off events. For 132574/132574 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23536 event pairs, 279 based on Foata normal form. 2/3622 useless extension candidates. Maximal degree in co-relation 40309. Up to 3097 conditions per place. [2023-08-30 20:00:05,421 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 660 selfloop transitions, 252 changer transitions 3/915 dead transitions. [2023-08-30 20:00:05,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 915 transitions, 21314 flow [2023-08-30 20:00:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 20:00:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 20:00:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3382 transitions. [2023-08-30 20:00:05,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34930799421607106 [2023-08-30 20:00:05,424 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3382 transitions. [2023-08-30 20:00:05,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3382 transitions. [2023-08-30 20:00:05,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:05,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3382 transitions. [2023-08-30 20:00:05,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 71.95744680851064) internal successors, (3382), 47 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,432 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,432 INFO L175 Difference]: Start difference. First operand has 478 places, 774 transitions, 16458 flow. Second operand 47 states and 3382 transitions. [2023-08-30 20:00:05,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 915 transitions, 21314 flow [2023-08-30 20:00:06,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 915 transitions, 19765 flow, removed 594 selfloop flow, removed 27 redundant places. [2023-08-30 20:00:06,126 INFO L231 Difference]: Finished difference. Result has 501 places, 845 transitions, 18263 flow [2023-08-30 20:00:06,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=15104, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=18263, PETRI_PLACES=501, PETRI_TRANSITIONS=845} [2023-08-30 20:00:06,128 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 480 predicate places. [2023-08-30 20:00:06,128 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 845 transitions, 18263 flow [2023-08-30 20:00:06,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:06,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:06,129 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:06,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:06,336 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:06,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -371345147, now seen corresponding path program 41 times [2023-08-30 20:00:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:06,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547471605] [2023-08-30 20:00:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:06,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547471605] [2023-08-30 20:00:07,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547471605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728056141] [2023-08-30 20:00:07,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:00:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:07,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:07,219 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:07,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 20:00:07,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:00:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-30 20:00:07,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:07,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:07,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:07,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-30 20:00:07,949 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:00:07,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-30 20:00:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:00:08,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728056141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:08,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:08,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-30 20:00:08,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830800531] [2023-08-30 20:00:08,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:08,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:00:08,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:00:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 20:00:09,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:00:09,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 845 transitions, 18263 flow. Second operand has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:09,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:09,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:00:09,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:11,815 INFO L130 PetriNetUnfolder]: 2093/3853 cut-off events. [2023-08-30 20:00:11,815 INFO L131 PetriNetUnfolder]: For 150496/150496 co-relation queries the response was YES. [2023-08-30 20:00:11,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43988 conditions, 3853 events. 2093/3853 cut-off events. For 150496/150496 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25328 event pairs, 330 based on Foata normal form. 6/3859 useless extension candidates. Maximal degree in co-relation 43825. Up to 3106 conditions per place. [2023-08-30 20:00:11,853 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 628 selfloop transitions, 310 changer transitions 6/944 dead transitions. [2023-08-30 20:00:11,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 944 transitions, 22905 flow [2023-08-30 20:00:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 20:00:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 20:00:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1924 transitions. [2023-08-30 20:00:11,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592233009708738 [2023-08-30 20:00:11,856 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1924 transitions. [2023-08-30 20:00:11,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1924 transitions. [2023-08-30 20:00:11,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:11,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1924 transitions. [2023-08-30 20:00:11,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.0) internal successors, (1924), 26 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:11,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 206.0) internal successors, (5562), 27 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:11,862 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 206.0) internal successors, (5562), 27 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:11,862 INFO L175 Difference]: Start difference. First operand has 501 places, 845 transitions, 18263 flow. Second operand 26 states and 1924 transitions. [2023-08-30 20:00:11,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 944 transitions, 22905 flow [2023-08-30 20:00:12,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 944 transitions, 22222 flow, removed 262 selfloop flow, removed 32 redundant places. [2023-08-30 20:00:12,555 INFO L231 Difference]: Finished difference. Result has 499 places, 882 transitions, 20325 flow [2023-08-30 20:00:12,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=17584, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20325, PETRI_PLACES=499, PETRI_TRANSITIONS=882} [2023-08-30 20:00:12,556 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 478 predicate places. [2023-08-30 20:00:12,556 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 882 transitions, 20325 flow [2023-08-30 20:00:12,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:12,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:12,557 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:12,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:12,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 20:00:12,757 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:12,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1894271659, now seen corresponding path program 42 times [2023-08-30 20:00:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821426941] [2023-08-30 20:00:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:13,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:13,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821426941] [2023-08-30 20:00:13,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821426941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:13,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312826562] [2023-08-30 20:00:13,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:00:13,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:13,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:13,481 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:13,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 20:00:13,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 20:00:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:13,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-30 20:00:13,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:13,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:00:13,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:00:13,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:00:14,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:14,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-08-30 20:00:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:14,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:17,684 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1571 (Array Int Int)) (v_subst_20 Int)) (or (<= c_~N~0 v_subst_20) (< (+ v_subst_20 1) c_~N~0) (forall ((v_subst_18 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1571) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 (+ c_~A~0.offset (* v_subst_20 4)))) (let ((.cse2 (* v_subst_18 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ c_~A~0.offset .cse2)) 1)))) (<= c_~N~0 (+ v_subst_18 1)) (< (+ 2 v_subst_18) c_~N~0))))) (forall ((v_subst_19 Int) (v_ArrVal_1571 (Array Int Int))) (or (< (+ v_subst_19 1) c_~N~0) (forall ((v_subst_17 Int)) (or (<= c_~N~0 (+ v_subst_17 1)) (< (+ 2 v_subst_17) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1571) c_~A~0.base))) (<= (let ((.cse4 (* v_subst_17 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) c_~counter~0 (select .cse3 (+ c_~A~0.offset .cse4)))) (+ (select .cse3 .cse1) (select .cse3 (+ c_~A~0.offset (* v_subst_19 4)))))))) (<= c_~N~0 v_subst_19))))) is different from false [2023-08-30 20:00:23,886 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:00:23,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:23,924 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 111 treesize of output 76 [2023-08-30 20:00:23,949 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 20:00:23,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 151 [2023-08-30 20:00:23,977 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 20:00:23,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 102 [2023-08-30 20:00:24,004 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 20:00:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 48 [2023-08-30 20:00:24,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:24,078 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 112 treesize of output 77 [2023-08-30 20:00:24,114 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-30 20:00:24,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 342 treesize of output 288 [2023-08-30 20:00:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:24,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:00:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 25 [2023-08-30 20:00:24,147 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-30 20:00:24,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 41 [2023-08-30 20:00:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:24,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312826562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:24,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-08-30 20:00:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615475823] [2023-08-30 20:00:24,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 20:00:24,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 20:00:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1716, Unknown=1, NotChecked=86, Total=2070 [2023-08-30 20:00:24,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 20:00:24,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 882 transitions, 20325 flow. Second operand has 46 states, 46 states have (on average 54.32608695652174) internal successors, (2499), 46 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:24,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:24,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 20:00:24,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:30,088 INFO L130 PetriNetUnfolder]: 2404/4554 cut-off events. [2023-08-30 20:00:30,088 INFO L131 PetriNetUnfolder]: For 194246/194246 co-relation queries the response was YES. [2023-08-30 20:00:30,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51805 conditions, 4554 events. 2404/4554 cut-off events. For 194246/194246 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32296 event pairs, 8 based on Foata normal form. 6/4560 useless extension candidates. Maximal degree in co-relation 51637. Up to 2897 conditions per place. [2023-08-30 20:00:30,230 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 688 selfloop transitions, 395 changer transitions 9/1092 dead transitions. [2023-08-30 20:00:30,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1092 transitions, 26981 flow [2023-08-30 20:00:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 20:00:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 20:00:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2683 transitions. [2023-08-30 20:00:30,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2771121669076637 [2023-08-30 20:00:30,234 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2683 transitions. [2023-08-30 20:00:30,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2683 transitions. [2023-08-30 20:00:30,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:30,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2683 transitions. [2023-08-30 20:00:30,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.08510638297872) internal successors, (2683), 47 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:30,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:30,241 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:30,241 INFO L175 Difference]: Start difference. First operand has 499 places, 882 transitions, 20325 flow. Second operand 47 states and 2683 transitions. [2023-08-30 20:00:30,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 1092 transitions, 26981 flow [2023-08-30 20:00:31,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1092 transitions, 25532 flow, removed 673 selfloop flow, removed 12 redundant places. [2023-08-30 20:00:31,162 INFO L231 Difference]: Finished difference. Result has 541 places, 1009 transitions, 23814 flow [2023-08-30 20:00:31,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=19228, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=23814, PETRI_PLACES=541, PETRI_TRANSITIONS=1009} [2023-08-30 20:00:31,163 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 520 predicate places. [2023-08-30 20:00:31,164 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1009 transitions, 23814 flow [2023-08-30 20:00:31,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 54.32608695652174) internal successors, (2499), 46 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:31,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:31,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:31,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-08-30 20:00:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 20:00:31,365 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:31,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash -905397043, now seen corresponding path program 43 times [2023-08-30 20:00:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:31,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980836557] [2023-08-30 20:00:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:32,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980836557] [2023-08-30 20:00:32,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980836557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:32,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762589130] [2023-08-30 20:00:32,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:00:32,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:32,133 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:32,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 20:00:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-30 20:00:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:32,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:32,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-30 20:00:32,860 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:00:32,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-30 20:00:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:00:32,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762589130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:32,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:32,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-30 20:00:32,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646451837] [2023-08-30 20:00:32,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:00:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:00:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 20:00:34,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 20:00:34,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1009 transitions, 23814 flow. Second operand has 35 states, 35 states have (on average 69.6) internal successors, (2436), 35 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:34,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:34,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 20:00:34,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:37,944 INFO L130 PetriNetUnfolder]: 2577/4907 cut-off events. [2023-08-30 20:00:37,944 INFO L131 PetriNetUnfolder]: For 240083/240083 co-relation queries the response was YES. [2023-08-30 20:00:37,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58498 conditions, 4907 events. 2577/4907 cut-off events. For 240083/240083 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35069 event pairs, 340 based on Foata normal form. 6/4913 useless extension candidates. Maximal degree in co-relation 58321. Up to 4162 conditions per place. [2023-08-30 20:00:38,000 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 891 selfloop transitions, 250 changer transitions 6/1147 dead transitions. [2023-08-30 20:00:38,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1147 transitions, 30412 flow [2023-08-30 20:00:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 20:00:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 20:00:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2403 transitions. [2023-08-30 20:00:38,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353486319505737 [2023-08-30 20:00:38,002 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2403 transitions. [2023-08-30 20:00:38,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2403 transitions. [2023-08-30 20:00:38,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:38,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2403 transitions. [2023-08-30 20:00:38,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.81818181818181) internal successors, (2403), 33 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) [2023-08-30 20:00:38,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:38,009 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:38,010 INFO L175 Difference]: Start difference. First operand has 541 places, 1009 transitions, 23814 flow. Second operand 33 states and 2403 transitions. [2023-08-30 20:00:38,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1147 transitions, 30412 flow [2023-08-30 20:00:39,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 1147 transitions, 28608 flow, removed 834 selfloop flow, removed 25 redundant places. [2023-08-30 20:00:39,143 INFO L231 Difference]: Finished difference. Result has 555 places, 1062 transitions, 25693 flow [2023-08-30 20:00:39,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=22328, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=25693, PETRI_PLACES=555, PETRI_TRANSITIONS=1062} [2023-08-30 20:00:39,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 534 predicate places. [2023-08-30 20:00:39,144 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 1062 transitions, 25693 flow [2023-08-30 20:00:39,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 69.6) internal successors, (2436), 35 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:39,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:39,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:39,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:39,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 20:00:39,346 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:39,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash -909200725, now seen corresponding path program 44 times [2023-08-30 20:00:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:39,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201817419] [2023-08-30 20:00:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:40,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:40,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201817419] [2023-08-30 20:00:40,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201817419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:40,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280954397] [2023-08-30 20:00:40,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:00:40,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:40,181 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:40,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 20:00:40,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:00:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-08-30 20:00:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:40,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:40,637 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 15 treesize of output 14 [2023-08-30 20:00:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:40,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:45,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:45,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-30 20:00:45,580 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-08-30 20:00:45,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-08-30 20:00:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:45,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280954397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:45,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:45,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 39 [2023-08-30 20:00:45,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151241719] [2023-08-30 20:00:45,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:45,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 20:00:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 20:00:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1350, Unknown=2, NotChecked=0, Total=1640 [2023-08-30 20:00:48,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:50,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:51,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:54,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:56,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:59,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:01,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:03,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:06,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:09,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 206 [2023-08-30 20:01:09,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1062 transitions, 25693 flow. Second operand has 41 states, 41 states have (on average 56.41463414634146) internal successors, (2313), 41 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:09,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:09,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 206 [2023-08-30 20:01:09,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:12,742 INFO L130 PetriNetUnfolder]: 2620/4988 cut-off events. [2023-08-30 20:01:12,743 INFO L131 PetriNetUnfolder]: For 225479/225479 co-relation queries the response was YES. [2023-08-30 20:01:12,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58744 conditions, 4988 events. 2620/4988 cut-off events. For 225479/225479 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35874 event pairs, 382 based on Foata normal form. 2/4990 useless extension candidates. Maximal degree in co-relation 58560. Up to 4392 conditions per place. [2023-08-30 20:01:12,801 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 830 selfloop transitions, 284 changer transitions 3/1117 dead transitions. [2023-08-30 20:01:12,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1117 transitions, 29347 flow [2023-08-30 20:01:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 20:01:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 20:01:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1479 transitions. [2023-08-30 20:01:12,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871844660194175 [2023-08-30 20:01:12,802 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1479 transitions. [2023-08-30 20:01:12,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1479 transitions. [2023-08-30 20:01:12,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:12,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1479 transitions. [2023-08-30 20:01:12,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.16) internal successors, (1479), 25 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:12,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:12,806 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:12,806 INFO L175 Difference]: Start difference. First operand has 555 places, 1062 transitions, 25693 flow. Second operand 25 states and 1479 transitions. [2023-08-30 20:01:12,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1117 transitions, 29347 flow [2023-08-30 20:01:14,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 1117 transitions, 27457 flow, removed 840 selfloop flow, removed 20 redundant places. [2023-08-30 20:01:14,191 INFO L231 Difference]: Finished difference. Result has 563 places, 1080 transitions, 25576 flow [2023-08-30 20:01:14,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=23803, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=25576, PETRI_PLACES=563, PETRI_TRANSITIONS=1080} [2023-08-30 20:01:14,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 542 predicate places. [2023-08-30 20:01:14,192 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1080 transitions, 25576 flow [2023-08-30 20:01:14,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.41463414634146) internal successors, (2313), 41 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:14,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:14,193 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:14,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 20:01:14,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:14,399 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:14,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1356416081, now seen corresponding path program 45 times [2023-08-30 20:01:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811779825] [2023-08-30 20:01:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:15,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811779825] [2023-08-30 20:01:15,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811779825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542470125] [2023-08-30 20:01:15,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:01:15,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:15,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:15,064 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:15,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 20:01:15,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:01:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-30 20:01:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:15,408 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 13 treesize of output 9 [2023-08-30 20:01:15,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:01:15,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:01:15,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:15,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-08-30 20:01:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:18,819 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1689 (Array Int Int)) (v_subst_21 Int)) (or (<= c_~N~0 v_subst_21) (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_276| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_276|) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1689) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_276| 4)))) (select .cse0 (+ (* v_subst_21 4) c_~A~0.offset)))) (< |v_thread1Thread1of1ForFork0_~i~0#1_276| 2))) (< (+ v_subst_21 1) c_~N~0))) (forall ((v_ArrVal_1689 (Array Int Int)) (v_subst_22 Int)) (or (< (+ v_subst_22 1) c_~N~0) (<= c_~N~0 v_subst_22) (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_276| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_276|) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1689) c_~A~0.base))) (< (select .cse1 (+ c_~A~0.offset (* v_subst_22 4))) (+ c_~counter~0 (select .cse1 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_276| 4))) 1))) (< |v_thread1Thread1of1ForFork0_~i~0#1_276| 2)))))) is different from false [2023-08-30 20:01:19,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:19,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2023-08-30 20:01:19,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:19,022 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 102 treesize of output 94 [2023-08-30 20:01:19,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:19,031 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 86 treesize of output 70 [2023-08-30 20:01:19,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:19,041 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 36 treesize of output 33 [2023-08-30 20:01:19,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:19,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 47 [2023-08-30 20:01:19,128 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:01:19,128 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 106 treesize of output 94 [2023-08-30 20:01:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:01:19,136 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 50 treesize of output 37 [2023-08-30 20:01:19,144 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:01:19,144 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 76 treesize of output 56 [2023-08-30 20:01:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542470125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:19,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-08-30 20:01:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959217833] [2023-08-30 20:01:19,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 20:01:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 20:01:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1580, Unknown=1, NotChecked=82, Total=1892 [2023-08-30 20:01:19,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 20:01:19,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1080 transitions, 25576 flow. Second operand has 44 states, 44 states have (on average 54.38636363636363) internal successors, (2393), 44 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:19,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:19,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 20:01:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:23,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:25,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:27,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:39,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:43,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:02:03,426 INFO L130 PetriNetUnfolder]: 3213/6090 cut-off events. [2023-08-30 20:02:03,426 INFO L131 PetriNetUnfolder]: For 314855/314855 co-relation queries the response was YES. [2023-08-30 20:02:03,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74683 conditions, 6090 events. 3213/6090 cut-off events. For 314855/314855 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45764 event pairs, 45 based on Foata normal form. 9/6099 useless extension candidates. Maximal degree in co-relation 74496. Up to 2352 conditions per place. [2023-08-30 20:02:03,494 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 759 selfloop transitions, 686 changer transitions 20/1465 dead transitions. [2023-08-30 20:02:03,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1465 transitions, 39088 flow [2023-08-30 20:02:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-30 20:02:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-30 20:02:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3572 transitions. [2023-08-30 20:02:03,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2796742875039148 [2023-08-30 20:02:03,497 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3572 transitions. [2023-08-30 20:02:03,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3572 transitions. [2023-08-30 20:02:03,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:03,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3572 transitions. [2023-08-30 20:02:03,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 57.61290322580645) internal successors, (3572), 62 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:03,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:03,506 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:03,506 INFO L175 Difference]: Start difference. First operand has 563 places, 1080 transitions, 25576 flow. Second operand 62 states and 3572 transitions. [2023-08-30 20:02:03,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1465 transitions, 39088 flow [2023-08-30 20:02:05,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1465 transitions, 38096 flow, removed 412 selfloop flow, removed 15 redundant places. [2023-08-30 20:02:05,179 INFO L231 Difference]: Finished difference. Result has 628 places, 1329 transitions, 35767 flow [2023-08-30 20:02:05,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=24769, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=35767, PETRI_PLACES=628, PETRI_TRANSITIONS=1329} [2023-08-30 20:02:05,180 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 607 predicate places. [2023-08-30 20:02:05,180 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 1329 transitions, 35767 flow [2023-08-30 20:02:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.38636363636363) internal successors, (2393), 44 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:05,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:05,181 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:05,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-30 20:02:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 20:02:05,382 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:05,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1441966515, now seen corresponding path program 46 times [2023-08-30 20:02:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038628047] [2023-08-30 20:02:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038628047] [2023-08-30 20:02:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038628047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93622122] [2023-08-30 20:02:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:02:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:06,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:06,116 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:02:06,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 20:02:06,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:02:06,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:02:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 20:02:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:06,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:06,630 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 15 treesize of output 14 [2023-08-30 20:02:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:06,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:07,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:07,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-08-30 20:02:07,766 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-30 20:02:07,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-08-30 20:02:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:08,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93622122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:02:08,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:02:08,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-08-30 20:02:08,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128937450] [2023-08-30 20:02:08,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:02:08,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 20:02:08,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:02:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 20:02:08,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 20:02:11,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-08-30 20:02:11,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 1329 transitions, 35767 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:11,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:02:11,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-08-30 20:02:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:16,020 INFO L130 PetriNetUnfolder]: 3389/6428 cut-off events. [2023-08-30 20:02:16,020 INFO L131 PetriNetUnfolder]: For 406385/406385 co-relation queries the response was YES. [2023-08-30 20:02:16,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85125 conditions, 6428 events. 3389/6428 cut-off events. For 406385/406385 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 48784 event pairs, 476 based on Foata normal form. 6/6434 useless extension candidates. Maximal degree in co-relation 84919. Up to 5867 conditions per place. [2023-08-30 20:02:16,099 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1227 selfloop transitions, 224 changer transitions 8/1459 dead transitions. [2023-08-30 20:02:16,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 1459 transitions, 41852 flow [2023-08-30 20:02:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 20:02:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 20:02:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2817 transitions. [2023-08-30 20:02:16,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37985436893203883 [2023-08-30 20:02:16,102 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2817 transitions. [2023-08-30 20:02:16,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2817 transitions. [2023-08-30 20:02:16,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:16,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2817 transitions. [2023-08-30 20:02:16,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.25) internal successors, (2817), 36 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:16,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:16,110 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:16,110 INFO L175 Difference]: Start difference. First operand has 628 places, 1329 transitions, 35767 flow. Second operand 36 states and 2817 transitions. [2023-08-30 20:02:16,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 1459 transitions, 41852 flow [2023-08-30 20:02:18,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1459 transitions, 37246 flow, removed 2194 selfloop flow, removed 34 redundant places. [2023-08-30 20:02:18,842 INFO L231 Difference]: Finished difference. Result has 635 places, 1391 transitions, 34455 flow [2023-08-30 20:02:18,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=31569, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=34455, PETRI_PLACES=635, PETRI_TRANSITIONS=1391} [2023-08-30 20:02:18,843 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 614 predicate places. [2023-08-30 20:02:18,843 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 1391 transitions, 34455 flow [2023-08-30 20:02:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:18,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:18,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:18,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 20:02:19,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:19,044 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:19,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash 819846609, now seen corresponding path program 47 times [2023-08-30 20:02:19,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:19,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981937861] [2023-08-30 20:02:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:19,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:19,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981937861] [2023-08-30 20:02:19,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981937861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:19,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967492939] [2023-08-30 20:02:19,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:02:19,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:19,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:19,741 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:02:19,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 20:02:19,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:02:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:02:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-30 20:02:19,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:19,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:02:19,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:02:20,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:02:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:02:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:02:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:02:20,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:20,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-08-30 20:02:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:20,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:02:20,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967492939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:02:20,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:02:20,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 9] total 35 [2023-08-30 20:02:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482021199] [2023-08-30 20:02:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:02:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 20:02:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:02:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 20:02:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 20:02:23,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:02:23,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 1391 transitions, 34455 flow. Second operand has 37 states, 37 states have (on average 70.51351351351352) internal successors, (2609), 37 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:23,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:02:23,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:02:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:29,638 INFO L130 PetriNetUnfolder]: 3734/7135 cut-off events. [2023-08-30 20:02:29,638 INFO L131 PetriNetUnfolder]: For 441891/441891 co-relation queries the response was YES. [2023-08-30 20:02:29,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92315 conditions, 7135 events. 3734/7135 cut-off events. For 441891/441891 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 55514 event pairs, 506 based on Foata normal form. 6/7141 useless extension candidates. Maximal degree in co-relation 92102. Up to 5052 conditions per place. [2023-08-30 20:02:29,733 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 998 selfloop transitions, 632 changer transitions 11/1641 dead transitions. [2023-08-30 20:02:29,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 1641 transitions, 46491 flow [2023-08-30 20:02:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 20:02:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 20:02:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2915 transitions. [2023-08-30 20:02:29,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36283295992033854 [2023-08-30 20:02:29,736 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2915 transitions. [2023-08-30 20:02:29,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2915 transitions. [2023-08-30 20:02:29,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:29,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2915 transitions. [2023-08-30 20:02:29,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 74.74358974358974) internal successors, (2915), 39 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:29,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:29,742 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:29,742 INFO L175 Difference]: Start difference. First operand has 635 places, 1391 transitions, 34455 flow. Second operand 39 states and 2915 transitions. [2023-08-30 20:02:29,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 1641 transitions, 46491 flow [2023-08-30 20:02:32,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 1641 transitions, 45630 flow, removed 375 selfloop flow, removed 22 redundant places. [2023-08-30 20:02:32,849 INFO L231 Difference]: Finished difference. Result has 668 places, 1510 transitions, 42000 flow [2023-08-30 20:02:32,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=33640, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=42000, PETRI_PLACES=668, PETRI_TRANSITIONS=1510} [2023-08-30 20:02:32,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 647 predicate places. [2023-08-30 20:02:32,850 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 1510 transitions, 42000 flow [2023-08-30 20:02:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 70.51351351351352) internal successors, (2609), 37 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:32,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:32,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:32,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 20:02:33,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 20:02:33,053 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:33,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1952573787, now seen corresponding path program 48 times [2023-08-30 20:02:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:33,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498774359] [2023-08-30 20:02:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:34,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:34,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498774359] [2023-08-30 20:02:34,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498774359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:34,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406509174] [2023-08-30 20:02:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:02:34,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:34,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:34,038 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:02:34,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 20:02:34,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 20:02:34,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:02:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 20:02:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:02:34,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:34,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:34,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-30 20:02:34,923 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:02:34,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-30 20:02:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:02:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406509174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:02:34,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:02:34,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-30 20:02:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451080644] [2023-08-30 20:02:34,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:02:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:02:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:02:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:02:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 20:02:36,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:02:36,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 1510 transitions, 42000 flow. Second operand has 33 states, 33 states have (on average 70.78787878787878) internal successors, (2336), 33 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:36,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:02:36,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:02:36,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:42,184 INFO L130 PetriNetUnfolder]: 3876/7440 cut-off events. [2023-08-30 20:02:42,185 INFO L131 PetriNetUnfolder]: For 564917/564917 co-relation queries the response was YES. [2023-08-30 20:02:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103697 conditions, 7440 events. 3876/7440 cut-off events. For 564917/564917 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 58402 event pairs, 620 based on Foata normal form. 4/7444 useless extension candidates. Maximal degree in co-relation 103467. Up to 6579 conditions per place. [2023-08-30 20:02:42,296 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1329 selfloop transitions, 304 changer transitions 5/1638 dead transitions. [2023-08-30 20:02:42,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 1638 transitions, 49705 flow [2023-08-30 20:02:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 20:02:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 20:02:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2597 transitions. [2023-08-30 20:02:42,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36019417475728155 [2023-08-30 20:02:42,298 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2597 transitions. [2023-08-30 20:02:42,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2597 transitions. [2023-08-30 20:02:42,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:42,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2597 transitions. [2023-08-30 20:02:42,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.2) internal successors, (2597), 35 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:42,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:42,303 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:42,303 INFO L175 Difference]: Start difference. First operand has 668 places, 1510 transitions, 42000 flow. Second operand 35 states and 2597 transitions. [2023-08-30 20:02:42,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 1638 transitions, 49705 flow [2023-08-30 20:02:46,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1638 transitions, 44925 flow, removed 2296 selfloop flow, removed 15 redundant places. [2023-08-30 20:02:46,540 INFO L231 Difference]: Finished difference. Result has 692 places, 1545 transitions, 40628 flow [2023-08-30 20:02:46,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38368, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=40628, PETRI_PLACES=692, PETRI_TRANSITIONS=1545} [2023-08-30 20:02:46,541 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 671 predicate places. [2023-08-30 20:02:46,541 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 1545 transitions, 40628 flow [2023-08-30 20:02:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.78787878787878) internal successors, (2336), 33 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:46,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:46,542 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:46,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-08-30 20:02:46,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-30 20:02:46,742 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:46,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash -825150651, now seen corresponding path program 49 times [2023-08-30 20:02:46,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:46,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541791794] [2023-08-30 20:02:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:46,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:47,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:47,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541791794] [2023-08-30 20:02:47,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541791794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:47,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382923226] [2023-08-30 20:02:47,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:02:47,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:47,356 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:02:47,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 20:02:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:47,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-30 20:02:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:02:47,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:47,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:47,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-30 20:02:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:02:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382923226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:02:48,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:02:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-08-30 20:02:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782688838] [2023-08-30 20:02:48,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:02:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 20:02:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:02:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 20:02:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 20:02:49,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-08-30 20:02:49,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1545 transitions, 40628 flow. Second operand has 34 states, 34 states have (on average 75.6470588235294) internal successors, (2572), 34 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:49,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:02:49,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-08-30 20:02:49,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:55,048 INFO L130 PetriNetUnfolder]: 4009/7711 cut-off events. [2023-08-30 20:02:55,048 INFO L131 PetriNetUnfolder]: For 545309/545309 co-relation queries the response was YES. [2023-08-30 20:02:55,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103517 conditions, 7711 events. 4009/7711 cut-off events. For 545309/545309 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 61129 event pairs, 621 based on Foata normal form. 6/7717 useless extension candidates. Maximal degree in co-relation 103283. Up to 6968 conditions per place. [2023-08-30 20:02:55,153 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1344 selfloop transitions, 312 changer transitions 4/1660 dead transitions. [2023-08-30 20:02:55,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 1660 transitions, 47718 flow [2023-08-30 20:02:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 20:02:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 20:02:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2427 transitions. [2023-08-30 20:02:55,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38005010961478236 [2023-08-30 20:02:55,156 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2427 transitions. [2023-08-30 20:02:55,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2427 transitions. [2023-08-30 20:02:55,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:55,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2427 transitions. [2023-08-30 20:02:55,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 78.29032258064517) internal successors, (2427), 31 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:55,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:55,160 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:55,160 INFO L175 Difference]: Start difference. First operand has 692 places, 1545 transitions, 40628 flow. Second operand 31 states and 2427 transitions. [2023-08-30 20:02:55,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 1660 transitions, 47718 flow [2023-08-30 20:02:59,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1660 transitions, 47148 flow, removed 177 selfloop flow, removed 24 redundant places. [2023-08-30 20:02:59,622 INFO L231 Difference]: Finished difference. Result has 703 places, 1600 transitions, 43637 flow [2023-08-30 20:02:59,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=40060, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43637, PETRI_PLACES=703, PETRI_TRANSITIONS=1600} [2023-08-30 20:02:59,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 682 predicate places. [2023-08-30 20:02:59,624 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1600 transitions, 43637 flow [2023-08-30 20:02:59,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 75.6470588235294) internal successors, (2572), 34 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:59,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:59,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:59,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 20:02:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:59,830 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:59,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 697853573, now seen corresponding path program 50 times [2023-08-30 20:02:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556498754] [2023-08-30 20:02:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:00,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:03:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556498754] [2023-08-30 20:03:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556498754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:03:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282382021] [2023-08-30 20:03:00,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:03:00,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:03:00,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:03:00,711 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:03:00,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 20:03:00,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:03:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:03:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 20:03:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:03:01,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:03:01,218 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 15 treesize of output 14 [2023-08-30 20:03:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:03:01,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:03:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-08-30 20:03:02,552 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-30 20:03:02,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-08-30 20:03:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282382021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:03:02,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:03:02,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-30 20:03:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694288384] [2023-08-30 20:03:02,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:03:02,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 20:03:02,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:03:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 20:03:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 20:03:07,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:03:07,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1600 transitions, 43637 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:07,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:03:07,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:03:07,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:15,302 INFO L130 PetriNetUnfolder]: 4250/8142 cut-off events. [2023-08-30 20:03:15,302 INFO L131 PetriNetUnfolder]: For 596889/596889 co-relation queries the response was YES. [2023-08-30 20:03:15,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112225 conditions, 8142 events. 4250/8142 cut-off events. For 596889/596889 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64872 event pairs, 620 based on Foata normal form. 4/8146 useless extension candidates. Maximal degree in co-relation 111986. Up to 7437 conditions per place. [2023-08-30 20:03:15,417 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1452 selfloop transitions, 351 changer transitions 6/1809 dead transitions. [2023-08-30 20:03:15,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 1809 transitions, 53799 flow [2023-08-30 20:03:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 20:03:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 20:03:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3643 transitions. [2023-08-30 20:03:15,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3536893203883495 [2023-08-30 20:03:15,420 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3643 transitions. [2023-08-30 20:03:15,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3643 transitions. [2023-08-30 20:03:15,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:15,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3643 transitions. [2023-08-30 20:03:15,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 72.86) internal successors, (3643), 50 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:15,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:15,427 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:15,427 INFO L175 Difference]: Start difference. First operand has 703 places, 1600 transitions, 43637 flow. Second operand 50 states and 3643 transitions. [2023-08-30 20:03:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 1809 transitions, 53799 flow [2023-08-30 20:03:20,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1809 transitions, 51719 flow, removed 970 selfloop flow, removed 16 redundant places. [2023-08-30 20:03:20,300 INFO L231 Difference]: Finished difference. Result has 744 places, 1728 transitions, 48085 flow [2023-08-30 20:03:20,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=42192, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=48085, PETRI_PLACES=744, PETRI_TRANSITIONS=1728} [2023-08-30 20:03:20,302 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 723 predicate places. [2023-08-30 20:03:20,302 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 1728 transitions, 48085 flow [2023-08-30 20:03:20,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:20,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:03:20,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:03:20,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-08-30 20:03:20,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-30 20:03:20,503 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:03:20,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:03:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1836557077, now seen corresponding path program 51 times [2023-08-30 20:03:20,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:03:20,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836072124] [2023-08-30 20:03:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:03:20,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:03:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:21,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:03:21,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836072124] [2023-08-30 20:03:21,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836072124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:03:21,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044431176] [2023-08-30 20:03:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:03:21,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:03:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:03:21,113 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:03:21,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 20:03:21,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 20:03:21,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:03:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-30 20:03:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:03:21,399 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 13 treesize of output 9 [2023-08-30 20:03:21,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:03:21,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:03:21,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:03:21,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-08-30 20:03:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:03:21,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:03:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:03:22,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044431176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:03:22,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:03:22,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 36 [2023-08-30 20:03:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171694069] [2023-08-30 20:03:22,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:03:22,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 20:03:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:03:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 20:03:22,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 20:03:23,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 20:03:23,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1728 transitions, 48085 flow. Second operand has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:23,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:03:23,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 20:03:23,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:31,847 INFO L130 PetriNetUnfolder]: 4483/8528 cut-off events. [2023-08-30 20:03:31,847 INFO L131 PetriNetUnfolder]: For 620277/620277 co-relation queries the response was YES. [2023-08-30 20:03:31,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118995 conditions, 8528 events. 4483/8528 cut-off events. For 620277/620277 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 68312 event pairs, 635 based on Foata normal form. 1/8529 useless extension candidates. Maximal degree in co-relation 118747. Up to 7606 conditions per place. [2023-08-30 20:03:31,970 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1441 selfloop transitions, 475 changer transitions 2/1918 dead transitions. [2023-08-30 20:03:31,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 1918 transitions, 57581 flow [2023-08-30 20:03:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 20:03:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 20:03:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3302 transitions. [2023-08-30 20:03:31,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34845926551287465 [2023-08-30 20:03:31,976 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3302 transitions. [2023-08-30 20:03:31,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3302 transitions. [2023-08-30 20:03:31,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:31,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3302 transitions. [2023-08-30 20:03:31,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 71.78260869565217) internal successors, (3302), 46 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:31,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 206.0) internal successors, (9682), 47 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:31,983 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 206.0) internal successors, (9682), 47 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:31,984 INFO L175 Difference]: Start difference. First operand has 744 places, 1728 transitions, 48085 flow. Second operand 46 states and 3302 transitions. [2023-08-30 20:03:31,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 1918 transitions, 57581 flow [2023-08-30 20:03:37,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 1918 transitions, 56334 flow, removed 552 selfloop flow, removed 22 redundant places. [2023-08-30 20:03:37,510 INFO L231 Difference]: Finished difference. Result has 778 places, 1855 transitions, 53441 flow [2023-08-30 20:03:37,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=46907, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=53441, PETRI_PLACES=778, PETRI_TRANSITIONS=1855} [2023-08-30 20:03:37,511 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 757 predicate places. [2023-08-30 20:03:37,512 INFO L495 AbstractCegarLoop]: Abstraction has has 778 places, 1855 transitions, 53441 flow [2023-08-30 20:03:37,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:37,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:03:37,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:03:37,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 20:03:37,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-30 20:03:37,713 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:03:37,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:03:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1741928771, now seen corresponding path program 52 times [2023-08-30 20:03:37,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:03:37,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606871989] [2023-08-30 20:03:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:03:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:03:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:03:38,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606871989] [2023-08-30 20:03:38,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606871989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:03:38,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682516552] [2023-08-30 20:03:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:03:38,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:03:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:03:38,667 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:03:38,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 20:03:38,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:03:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:03:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 20:03:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:03:39,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:03:39,202 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 15 treesize of output 14 [2023-08-30 20:03:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:39,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:03:39,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:03:39,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-30 20:03:40,233 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-30 20:03:40,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-30 20:03:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682516552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:03:40,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:03:40,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-30 20:03:40,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963764337] [2023-08-30 20:03:40,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:03:40,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 20:03:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:03:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 20:03:40,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 20:03:44,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:03:44,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1855 transitions, 53441 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:44,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:03:44,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:03:44,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:54,251 INFO L130 PetriNetUnfolder]: 4608/8781 cut-off events. [2023-08-30 20:03:54,251 INFO L131 PetriNetUnfolder]: For 696426/696426 co-relation queries the response was YES. [2023-08-30 20:03:54,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125551 conditions, 8781 events. 4608/8781 cut-off events. For 696426/696426 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 70665 event pairs, 638 based on Foata normal form. 6/8787 useless extension candidates. Maximal degree in co-relation 125294. Up to 7560 conditions per place. [2023-08-30 20:03:54,383 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1494 selfloop transitions, 502 changer transitions 6/2002 dead transitions. [2023-08-30 20:03:54,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 2002 transitions, 61000 flow [2023-08-30 20:03:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 20:03:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 20:03:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3866 transitions. [2023-08-30 20:03:54,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35409415643890824 [2023-08-30 20:03:54,386 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3866 transitions. [2023-08-30 20:03:54,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3866 transitions. [2023-08-30 20:03:54,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:54,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3866 transitions. [2023-08-30 20:03:54,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 72.94339622641509) internal successors, (3866), 53 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:54,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 206.0) internal successors, (11124), 54 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:54,397 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 206.0) internal successors, (11124), 54 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:54,397 INFO L175 Difference]: Start difference. First operand has 778 places, 1855 transitions, 53441 flow. Second operand 53 states and 3866 transitions. [2023-08-30 20:03:54,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 2002 transitions, 61000 flow [2023-08-30 20:04:00,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 2002 transitions, 59062 flow, removed 725 selfloop flow, removed 29 redundant places. [2023-08-30 20:04:00,678 INFO L231 Difference]: Finished difference. Result has 808 places, 1913 transitions, 55285 flow [2023-08-30 20:04:00,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=51522, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=55285, PETRI_PLACES=808, PETRI_TRANSITIONS=1913} [2023-08-30 20:04:00,680 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 787 predicate places. [2023-08-30 20:04:00,680 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 1913 transitions, 55285 flow [2023-08-30 20:04:00,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:00,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:04:00,681 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:04:00,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 20:04:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:00,887 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:04:00,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:04:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1616968635, now seen corresponding path program 53 times [2023-08-30 20:04:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:04:00,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937485187] [2023-08-30 20:04:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:04:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:04:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:04:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:04:01,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:04:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937485187] [2023-08-30 20:04:01,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937485187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:04:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988687315] [2023-08-30 20:04:01,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:04:01,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:04:01,690 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:04:01,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 20:04:01,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:04:01,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:04:01,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-30 20:04:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:04:01,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:04:01,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:04:01,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:04:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:04:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:04:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:04:02,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:02,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-08-30 20:04:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:04:02,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:04:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:04:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988687315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:04:02,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:04:02,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 9] total 36 [2023-08-30 20:04:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979806711] [2023-08-30 20:04:02,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:04:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 20:04:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:04:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 20:04:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 20:04:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:04:05,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 1913 transitions, 55285 flow. Second operand has 38 states, 38 states have (on average 70.47368421052632) internal successors, (2678), 38 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:05,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:04:05,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:04:05,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:04:14,236 INFO L130 PetriNetUnfolder]: 4827/9181 cut-off events. [2023-08-30 20:04:14,236 INFO L131 PetriNetUnfolder]: For 749856/749856 co-relation queries the response was YES. [2023-08-30 20:04:14,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133806 conditions, 9181 events. 4827/9181 cut-off events. For 749856/749856 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 74587 event pairs, 652 based on Foata normal form. 7/9188 useless extension candidates. Maximal degree in co-relation 133546. Up to 8073 conditions per place. [2023-08-30 20:04:14,530 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1585 selfloop transitions, 501 changer transitions 15/2101 dead transitions. [2023-08-30 20:04:14,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2101 transitions, 65747 flow [2023-08-30 20:04:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 20:04:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 20:04:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3578 transitions. [2023-08-30 20:04:14,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35446800079255003 [2023-08-30 20:04:14,533 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3578 transitions. [2023-08-30 20:04:14,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3578 transitions. [2023-08-30 20:04:14,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:04:14,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3578 transitions. [2023-08-30 20:04:14,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 73.0204081632653) internal successors, (3578), 49 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:14,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:14,543 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:14,543 INFO L175 Difference]: Start difference. First operand has 808 places, 1913 transitions, 55285 flow. Second operand 49 states and 3578 transitions. [2023-08-30 20:04:14,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2101 transitions, 65747 flow [2023-08-30 20:04:21,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 829 places, 2101 transitions, 64606 flow, removed 450 selfloop flow, removed 27 redundant places. [2023-08-30 20:04:21,477 INFO L231 Difference]: Finished difference. Result has 845 places, 2025 transitions, 60842 flow [2023-08-30 20:04:21,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54148, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=60842, PETRI_PLACES=845, PETRI_TRANSITIONS=2025} [2023-08-30 20:04:21,478 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 824 predicate places. [2023-08-30 20:04:21,478 INFO L495 AbstractCegarLoop]: Abstraction has has 845 places, 2025 transitions, 60842 flow [2023-08-30 20:04:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.47368421052632) internal successors, (2678), 38 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:21,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:04:21,479 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:04:21,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-08-30 20:04:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:21,681 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:04:21,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:04:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -815373929, now seen corresponding path program 54 times [2023-08-30 20:04:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:04:21,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697358765] [2023-08-30 20:04:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:04:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:04:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:04:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:04:22,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:04:22,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697358765] [2023-08-30 20:04:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697358765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:04:22,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116932658] [2023-08-30 20:04:22,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:04:22,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:04:22,530 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:04:22,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 20:04:22,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:04:22,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:04:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 20:04:22,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:04:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:04:22,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:04:23,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:23,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-30 20:04:23,293 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:04:23,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-30 20:04:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:04:23,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116932658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:04:23,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:04:23,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-30 20:04:23,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237054397] [2023-08-30 20:04:23,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:04:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:04:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:04:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:04:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 20:04:24,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:04:24,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 2025 transitions, 60842 flow. Second operand has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:24,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:04:24,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:04:24,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:04:33,014 INFO L130 PetriNetUnfolder]: 4972/9466 cut-off events. [2023-08-30 20:04:33,014 INFO L131 PetriNetUnfolder]: For 1064701/1064701 co-relation queries the response was YES. [2023-08-30 20:04:33,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150361 conditions, 9466 events. 4972/9466 cut-off events. For 1064701/1064701 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 77182 event pairs, 733 based on Foata normal form. 8/9474 useless extension candidates. Maximal degree in co-relation 150084. Up to 8944 conditions per place. [2023-08-30 20:04:33,253 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1953 selfloop transitions, 173 changer transitions 2/2128 dead transitions. [2023-08-30 20:04:33,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 2128 transitions, 68900 flow [2023-08-30 20:04:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:04:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:04:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1989 transitions. [2023-08-30 20:04:33,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35760517799352753 [2023-08-30 20:04:33,255 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1989 transitions. [2023-08-30 20:04:33,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1989 transitions. [2023-08-30 20:04:33,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:04:33,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1989 transitions. [2023-08-30 20:04:33,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.66666666666667) internal successors, (1989), 27 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:33,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:33,259 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:33,259 INFO L175 Difference]: Start difference. First operand has 845 places, 2025 transitions, 60842 flow. Second operand 27 states and 1989 transitions. [2023-08-30 20:04:33,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 869 places, 2128 transitions, 68900 flow [2023-08-30 20:04:43,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 2128 transitions, 64970 flow, removed 1816 selfloop flow, removed 24 redundant places. [2023-08-30 20:04:43,273 INFO L231 Difference]: Finished difference. Result has 852 places, 2067 transitions, 60024 flow [2023-08-30 20:04:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=56916, PETRI_DIFFERENCE_MINUEND_PLACES=819, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=60024, PETRI_PLACES=852, PETRI_TRANSITIONS=2067} [2023-08-30 20:04:43,274 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 831 predicate places. [2023-08-30 20:04:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 852 places, 2067 transitions, 60024 flow [2023-08-30 20:04:43,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:43,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:04:43,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:04:43,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-30 20:04:43,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:43,476 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:04:43,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:04:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1975367171, now seen corresponding path program 55 times [2023-08-30 20:04:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:04:43,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671215465] [2023-08-30 20:04:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:04:43,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:04:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:04:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:04:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:04:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671215465] [2023-08-30 20:04:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671215465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:04:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935970725] [2023-08-30 20:04:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:04:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:04:44,200 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:04:44,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 20:04:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:04:44,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-08-30 20:04:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:04:44,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:04:44,557 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 25 treesize of output 23 [2023-08-30 20:04:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:04:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:04:44,892 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2082 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2082) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2))) (+ .cse3 c_~counter~0 1))) (forall ((v_ArrVal_2082 (Array Int Int))) (<= (+ .cse3 c_~counter~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2082) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2023-08-30 20:04:45,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:45,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 118 [2023-08-30 20:04:45,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:45,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 14 [2023-08-30 20:04:45,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:04:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-30 20:04:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935970725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:04:45,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:04:45,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-08-30 20:04:45,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78848879] [2023-08-30 20:04:45,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:04:45,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 20:04:45,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:04:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 20:04:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1251, Unknown=19, NotChecked=72, Total=1482 [2023-08-30 20:04:45,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 20:04:45,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 2067 transitions, 60024 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:45,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:04:45,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 20:04:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:04:54,920 INFO L130 PetriNetUnfolder]: 5115/9748 cut-off events. [2023-08-30 20:04:54,921 INFO L131 PetriNetUnfolder]: For 1089393/1089393 co-relation queries the response was YES. [2023-08-30 20:04:55,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150923 conditions, 9748 events. 5115/9748 cut-off events. For 1089393/1089393 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 80172 event pairs, 633 based on Foata normal form. 4/9752 useless extension candidates. Maximal degree in co-relation 150643. Up to 8232 conditions per place. [2023-08-30 20:04:55,155 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1628 selfloop transitions, 540 changer transitions 1/2169 dead transitions. [2023-08-30 20:04:55,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 2169 transitions, 67264 flow [2023-08-30 20:04:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 20:04:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 20:04:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1832 transitions. [2023-08-30 20:04:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2779126213592233 [2023-08-30 20:04:55,173 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1832 transitions. [2023-08-30 20:04:55,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1832 transitions. [2023-08-30 20:04:55,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:04:55,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1832 transitions. [2023-08-30 20:04:55,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.25) internal successors, (1832), 32 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:55,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:55,193 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:55,193 INFO L175 Difference]: Start difference. First operand has 852 places, 2067 transitions, 60024 flow. Second operand 32 states and 1832 transitions. [2023-08-30 20:04:55,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 2169 transitions, 67264 flow [2023-08-30 20:05:05,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 2169 transitions, 65389 flow, removed 860 selfloop flow, removed 16 redundant places. [2023-08-30 20:05:05,996 INFO L231 Difference]: Finished difference. Result has 873 places, 2116 transitions, 61745 flow [2023-08-30 20:05:05,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=58149, PETRI_DIFFERENCE_MINUEND_PLACES=836, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=61745, PETRI_PLACES=873, PETRI_TRANSITIONS=2116} [2023-08-30 20:05:05,998 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 852 predicate places. [2023-08-30 20:05:05,998 INFO L495 AbstractCegarLoop]: Abstraction has has 873 places, 2116 transitions, 61745 flow [2023-08-30 20:05:05,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:05,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:05:05,999 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:05:06,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-08-30 20:05:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 20:05:06,200 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:05:06,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:05:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash -793641339, now seen corresponding path program 56 times [2023-08-30 20:05:06,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:05:06,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253929136] [2023-08-30 20:05:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:05:06,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:05:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:05:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:05:07,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253929136] [2023-08-30 20:05:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253929136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:05:07,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526262229] [2023-08-30 20:05:07,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:05:07,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:05:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:05:07,010 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:05:07,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 20:05:07,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:05:07,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:05:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 20:05:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:05:07,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:05:07,545 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 15 treesize of output 14 [2023-08-30 20:05:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:07,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:05:08,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:05:08,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-08-30 20:05:08,642 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-30 20:05:08,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-08-30 20:05:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526262229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:05:08,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:05:08,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-30 20:05:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357509784] [2023-08-30 20:05:08,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:05:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 20:05:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:05:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 20:05:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 20:05:12,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-08-30 20:05:12,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 873 places, 2116 transitions, 61745 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:12,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:05:12,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-08-30 20:05:12,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:05:22,194 INFO L130 PetriNetUnfolder]: 5188/9905 cut-off events. [2023-08-30 20:05:22,195 INFO L131 PetriNetUnfolder]: For 1116767/1116767 co-relation queries the response was YES. [2023-08-30 20:05:22,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153987 conditions, 9905 events. 5188/9905 cut-off events. For 1116767/1116767 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 81879 event pairs, 765 based on Foata normal form. 6/9911 useless extension candidates. Maximal degree in co-relation 153700. Up to 9272 conditions per place. [2023-08-30 20:05:22,363 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1922 selfloop transitions, 282 changer transitions 6/2210 dead transitions. [2023-08-30 20:05:22,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 909 places, 2210 transitions, 69222 flow [2023-08-30 20:05:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:05:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:05:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2706 transitions. [2023-08-30 20:05:22,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3550249278404618 [2023-08-30 20:05:22,365 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2706 transitions. [2023-08-30 20:05:22,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2706 transitions. [2023-08-30 20:05:22,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:05:22,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2706 transitions. [2023-08-30 20:05:22,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.13513513513513) internal successors, (2706), 37 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:22,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:22,373 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:22,373 INFO L175 Difference]: Start difference. First operand has 873 places, 2116 transitions, 61745 flow. Second operand 37 states and 2706 transitions. [2023-08-30 20:05:22,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 909 places, 2210 transitions, 69222 flow [2023-08-30 20:05:35,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2210 transitions, 67471 flow, removed 571 selfloop flow, removed 23 redundant places. [2023-08-30 20:05:35,705 INFO L231 Difference]: Finished difference. Result has 890 places, 2146 transitions, 62637 flow [2023-08-30 20:05:35,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60002, PETRI_DIFFERENCE_MINUEND_PLACES=850, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=62637, PETRI_PLACES=890, PETRI_TRANSITIONS=2146} [2023-08-30 20:05:35,706 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 869 predicate places. [2023-08-30 20:05:35,706 INFO L495 AbstractCegarLoop]: Abstraction has has 890 places, 2146 transitions, 62637 flow [2023-08-30 20:05:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:35,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:05:35,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:05:35,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-08-30 20:05:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-08-30 20:05:35,908 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:05:35,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:05:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1295719703, now seen corresponding path program 57 times [2023-08-30 20:05:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:05:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006097391] [2023-08-30 20:05:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:05:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:05:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:05:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:36,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:05:36,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006097391] [2023-08-30 20:05:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006097391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:05:36,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731300795] [2023-08-30 20:05:36,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:05:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:05:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:05:36,794 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:05:36,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 20:05:37,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 20:05:37,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:05:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-30 20:05:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:05:37,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:05:37,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:05:37,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:05:37,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:05:37,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-08-30 20:05:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:37,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:05:41,133 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_subst_32 Int) (v_ArrVal_2162 (Array Int Int))) (or (< (+ 2 v_subst_32) c_~N~0) (<= c_~N~0 (+ v_subst_32 1)) (forall ((v_subst_34 Int)) (or (<= c_~N~0 v_subst_34) (< (+ v_subst_34 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2162) c_~A~0.base))) (<= (let ((.cse1 (* v_subst_32 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1)))) (+ (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* v_subst_34 4)))))))))) (forall ((v_ArrVal_2162 (Array Int Int)) (v_subst_31 Int)) (or (< (+ 2 v_subst_31) c_~N~0) (forall ((v_subst_33 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2162) c_~A~0.base))) (< (+ (select .cse3 .cse2) (select .cse3 (+ c_~A~0.offset (* v_subst_33 4)))) (let ((.cse4 (* v_subst_31 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) c_~counter~0 (select .cse3 (+ c_~A~0.offset .cse4 4)) 1)))) (<= c_~N~0 v_subst_33) (< (+ v_subst_33 1) c_~N~0))) (<= c_~N~0 (+ v_subst_31 1)))))) is different from false [2023-08-30 20:05:47,358 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:05:47,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:05:47,396 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 112 treesize of output 77 [2023-08-30 20:05:47,421 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 20:05:47,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 155 [2023-08-30 20:05:47,449 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 20:05:47,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 106 [2023-08-30 20:05:47,476 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-30 20:05:47,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 50 [2023-08-30 20:05:47,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:05:47,559 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 111 treesize of output 76 [2023-08-30 20:05:47,578 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-30 20:05:47,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 334 treesize of output 280 [2023-08-30 20:05:47,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:05:47,591 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:05:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:05:47,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-08-30 20:05:47,610 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-30 20:05:47,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-08-30 20:05:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:47,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731300795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:05:47,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:05:47,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-08-30 20:05:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691558987] [2023-08-30 20:05:47,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:05:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 20:05:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:05:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 20:05:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1823, Unknown=1, NotChecked=88, Total=2162 [2023-08-30 20:05:47,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 20:05:47,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 890 places, 2146 transitions, 62637 flow. Second operand has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:47,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:05:47,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 20:05:47,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:06:03,373 INFO L130 PetriNetUnfolder]: 5315/10132 cut-off events. [2023-08-30 20:06:03,373 INFO L131 PetriNetUnfolder]: For 1162367/1162367 co-relation queries the response was YES. [2023-08-30 20:06:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158260 conditions, 10132 events. 5315/10132 cut-off events. For 1162367/1162367 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 84547 event pairs, 47 based on Foata normal form. 4/10136 useless extension candidates. Maximal degree in co-relation 157970. Up to 5756 conditions per place. [2023-08-30 20:06:03,547 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1654 selfloop transitions, 677 changer transitions 18/2349 dead transitions. [2023-08-30 20:06:03,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 2349 transitions, 72669 flow [2023-08-30 20:06:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 20:06:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 20:06:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4264 transitions. [2023-08-30 20:06:03,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2759870550161812 [2023-08-30 20:06:03,550 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4264 transitions. [2023-08-30 20:06:03,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4264 transitions. [2023-08-30 20:06:03,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:06:03,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4264 transitions. [2023-08-30 20:06:03,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 56.85333333333333) internal successors, (4264), 75 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:03,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 206.0) internal successors, (15656), 76 states have internal predecessors, (15656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:03,560 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 206.0) internal successors, (15656), 76 states have internal predecessors, (15656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:03,560 INFO L175 Difference]: Start difference. First operand has 890 places, 2146 transitions, 62637 flow. Second operand 75 states and 4264 transitions. [2023-08-30 20:06:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 2349 transitions, 72669 flow [2023-08-30 20:06:18,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 2349 transitions, 71885 flow, removed 306 selfloop flow, removed 26 redundant places. [2023-08-30 20:06:18,197 INFO L231 Difference]: Finished difference. Result has 944 places, 2219 transitions, 67001 flow [2023-08-30 20:06:18,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=61856, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=67001, PETRI_PLACES=944, PETRI_TRANSITIONS=2219} [2023-08-30 20:06:18,199 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 923 predicate places. [2023-08-30 20:06:18,199 INFO L495 AbstractCegarLoop]: Abstraction has has 944 places, 2219 transitions, 67001 flow [2023-08-30 20:06:18,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:18,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:06:18,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:06:18,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 20:06:18,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-30 20:06:18,400 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:06:18,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:06:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1696269657, now seen corresponding path program 58 times [2023-08-30 20:06:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:06:18,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496715019] [2023-08-30 20:06:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:06:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:06:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:06:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:06:19,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:06:19,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496715019] [2023-08-30 20:06:19,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496715019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:06:19,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924093841] [2023-08-30 20:06:19,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:06:19,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:06:19,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:06:19,268 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:06:19,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 20:06:19,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:06:19,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:06:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-30 20:06:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:06:19,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:06:19,677 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 20 treesize of output 20 [2023-08-30 20:06:19,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:06:19,853 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 15 treesize of output 14 [2023-08-30 20:06:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:06:19,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:06:20,438 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((|thread1Thread1of1ForFork0_~i~0#1| Int) (v_ArrVal_2201 (Array Int Int))) (or (<= c_~N~0 |thread1Thread1of1ForFork0_~i~0#1|) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2201) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ (select .cse0 (+ c_~A~0.offset (* |thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 1))) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0))) (forall ((|thread1Thread1of1ForFork0_~i~0#1| Int) (v_ArrVal_2201 (Array Int Int))) (or (<= c_~N~0 |thread1Thread1of1ForFork0_~i~0#1|) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2201) c_~A~0.base))) (<= (+ (select .cse3 (+ c_~A~0.offset (* |thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1) (select .cse3 .cse2)))) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0))))) is different from false [2023-08-30 20:06:20,983 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_subst_35 Int) (v_ArrVal_2201 (Array Int Int))) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2201) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ .cse3 c_~counter~0 (select .cse0 (+ c_~A~0.offset (* v_subst_35 4))) 1))) (<= c_~N~0 v_subst_35) (< (+ v_subst_35 1) c_~N~0))) (forall ((v_subst_36 Int) (v_ArrVal_2201 (Array Int Int))) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2201) c_~A~0.base))) (<= (+ .cse3 c_~counter~0 (select .cse4 (+ c_~A~0.offset (* v_subst_36 4)))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2)))) (< (+ v_subst_36 1) c_~N~0) (<= c_~N~0 v_subst_36))))) is different from false [2023-08-30 20:06:21,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:06:21,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 140 [2023-08-30 20:06:21,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:06:21,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 40 [2023-08-30 20:06:21,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:06:21,995 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-30 20:06:21,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-30 20:06:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 20:06:22,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924093841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:06:22,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:06:22,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 20:06:22,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849280591] [2023-08-30 20:06:22,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:06:22,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 20:06:22,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:06:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 20:06:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1645, Unknown=2, NotChecked=166, Total=1980 [2023-08-30 20:06:22,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 20:06:22,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 2219 transitions, 67001 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:22,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:06:22,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 20:06:22,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:06:36,887 INFO L130 PetriNetUnfolder]: 5664/10778 cut-off events. [2023-08-30 20:06:36,887 INFO L131 PetriNetUnfolder]: For 1317472/1317472 co-relation queries the response was YES. [2023-08-30 20:06:37,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171251 conditions, 10778 events. 5664/10778 cut-off events. For 1317472/1317472 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 90237 event pairs, 701 based on Foata normal form. 3/10781 useless extension candidates. Maximal degree in co-relation 170954. Up to 9371 conditions per place. [2023-08-30 20:06:37,198 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1886 selfloop transitions, 562 changer transitions 10/2458 dead transitions. [2023-08-30 20:06:37,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 2458 transitions, 77632 flow [2023-08-30 20:06:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-30 20:06:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-30 20:06:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3530 transitions. [2023-08-30 20:06:37,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.276385844033824 [2023-08-30 20:06:37,202 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3530 transitions. [2023-08-30 20:06:37,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3530 transitions. [2023-08-30 20:06:37,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:06:37,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3530 transitions. [2023-08-30 20:06:37,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 56.935483870967744) internal successors, (3530), 62 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:37,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:37,212 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:37,212 INFO L175 Difference]: Start difference. First operand has 944 places, 2219 transitions, 67001 flow. Second operand 62 states and 3530 transitions. [2023-08-30 20:06:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 2458 transitions, 77632 flow [2023-08-30 20:06:51,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 959 places, 2458 transitions, 76640 flow, removed 373 selfloop flow, removed 46 redundant places. [2023-08-30 20:06:51,219 INFO L231 Difference]: Finished difference. Result has 966 places, 2343 transitions, 71768 flow [2023-08-30 20:06:51,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=66009, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=71768, PETRI_PLACES=966, PETRI_TRANSITIONS=2343} [2023-08-30 20:06:51,221 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 945 predicate places. [2023-08-30 20:06:51,221 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 2343 transitions, 71768 flow [2023-08-30 20:06:51,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:51,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:06:51,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:06:51,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-30 20:06:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:06:51,422 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:06:51,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:06:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1542377303, now seen corresponding path program 59 times [2023-08-30 20:06:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:06:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453457961] [2023-08-30 20:06:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:06:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:06:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:06:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:06:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:06:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453457961] [2023-08-30 20:06:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453457961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:06:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868926650] [2023-08-30 20:06:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:06:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:06:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:06:52,043 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:06:52,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 20:06:52,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:06:52,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:06:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 20:06:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:06:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:06:52,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:06:52,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:06:52,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-30 20:06:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:06:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868926650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:06:52,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:06:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-08-30 20:06:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160687466] [2023-08-30 20:06:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:06:52,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:06:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:06:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:06:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-08-30 20:06:54,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-08-30 20:06:54,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 2343 transitions, 71768 flow. Second operand has 32 states, 32 states have (on average 75.6875) internal successors, (2422), 32 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:54,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:06:54,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-08-30 20:06:54,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:07:05,335 INFO L130 PetriNetUnfolder]: 5836/11130 cut-off events. [2023-08-30 20:07:05,335 INFO L131 PetriNetUnfolder]: For 1506654/1506654 co-relation queries the response was YES. [2023-08-30 20:07:05,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184649 conditions, 11130 events. 5836/11130 cut-off events. For 1506654/1506654 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 93774 event pairs, 867 based on Foata normal form. 6/11136 useless extension candidates. Maximal degree in co-relation 184344. Up to 10228 conditions per place. [2023-08-30 20:07:05,533 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2093 selfloop transitions, 402 changer transitions 6/2501 dead transitions. [2023-08-30 20:07:05,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 2501 transitions, 83836 flow [2023-08-30 20:07:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 20:07:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 20:07:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3141 transitions. [2023-08-30 20:07:05,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811893203883495 [2023-08-30 20:07:05,535 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3141 transitions. [2023-08-30 20:07:05,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3141 transitions. [2023-08-30 20:07:05,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:07:05,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3141 transitions. [2023-08-30 20:07:05,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 78.525) internal successors, (3141), 40 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:05,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:05,541 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:05,541 INFO L175 Difference]: Start difference. First operand has 966 places, 2343 transitions, 71768 flow. Second operand 40 states and 3141 transitions. [2023-08-30 20:07:05,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 2501 transitions, 83836 flow [2023-08-30 20:07:19,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 963 places, 2501 transitions, 82292 flow, removed 530 selfloop flow, removed 42 redundant places. [2023-08-30 20:07:19,368 INFO L231 Difference]: Finished difference. Result has 970 places, 2411 transitions, 76051 flow [2023-08-30 20:07:19,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70243, PETRI_DIFFERENCE_MINUEND_PLACES=924, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=76051, PETRI_PLACES=970, PETRI_TRANSITIONS=2411} [2023-08-30 20:07:19,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 949 predicate places. [2023-08-30 20:07:19,370 INFO L495 AbstractCegarLoop]: Abstraction has has 970 places, 2411 transitions, 76051 flow [2023-08-30 20:07:19,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 75.6875) internal successors, (2422), 32 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:19,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:07:19,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:07:19,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 20:07:19,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:07:19,572 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:07:19,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:07:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1904877759, now seen corresponding path program 60 times [2023-08-30 20:07:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:07:19,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104851832] [2023-08-30 20:07:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:07:19,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:07:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:07:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:07:20,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:07:20,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104851832] [2023-08-30 20:07:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104851832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:07:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813116551] [2023-08-30 20:07:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:07:20,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:07:20,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:07:20,334 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:07:20,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 20:07:20,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:07:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:07:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 104 conjunts are in the unsatisfiable core [2023-08-30 20:07:20,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:07:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:07:20,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:07:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:07:20,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:07:21,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:07:21,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 134 [2023-08-30 20:07:21,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:07:21,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 70 [2023-08-30 20:07:21,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:07:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:07:21,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813116551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:07:21,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:07:21,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-08-30 20:07:21,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974376840] [2023-08-30 20:07:21,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:07:21,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 20:07:21,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:07:21,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 20:07:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1135, Unknown=2, NotChecked=0, Total=1260 [2023-08-30 20:07:23,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-08-30 20:07:23,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 970 places, 2411 transitions, 76051 flow. Second operand has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:23,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:07:23,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-08-30 20:07:23,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:07:35,034 INFO L130 PetriNetUnfolder]: 5957/11369 cut-off events. [2023-08-30 20:07:35,034 INFO L131 PetriNetUnfolder]: For 1572193/1572193 co-relation queries the response was YES. [2023-08-30 20:07:35,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190385 conditions, 11369 events. 5957/11369 cut-off events. For 1572193/1572193 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 96427 event pairs, 812 based on Foata normal form. 8/11377 useless extension candidates. Maximal degree in co-relation 190074. Up to 9942 conditions per place. [2023-08-30 20:07:35,243 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1909 selfloop transitions, 590 changer transitions 2/2501 dead transitions. [2023-08-30 20:07:35,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 999 places, 2501 transitions, 84853 flow [2023-08-30 20:07:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 20:07:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 20:07:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1727 transitions. [2023-08-30 20:07:35,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27944983818770225 [2023-08-30 20:07:35,245 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1727 transitions. [2023-08-30 20:07:35,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1727 transitions. [2023-08-30 20:07:35,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:07:35,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1727 transitions. [2023-08-30 20:07:35,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.56666666666667) internal successors, (1727), 30 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:35,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:35,249 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:35,250 INFO L175 Difference]: Start difference. First operand has 970 places, 2411 transitions, 76051 flow. Second operand 30 states and 1727 transitions. [2023-08-30 20:07:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 999 places, 2501 transitions, 84853 flow [2023-08-30 20:07:50,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 2501 transitions, 82505 flow, removed 1053 selfloop flow, removed 25 redundant places. [2023-08-30 20:07:50,222 INFO L231 Difference]: Finished difference. Result has 979 places, 2446 transitions, 77792 flow [2023-08-30 20:07:50,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=73703, PETRI_DIFFERENCE_MINUEND_PLACES=945, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=77792, PETRI_PLACES=979, PETRI_TRANSITIONS=2446} [2023-08-30 20:07:50,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 958 predicate places. [2023-08-30 20:07:50,224 INFO L495 AbstractCegarLoop]: Abstraction has has 979 places, 2446 transitions, 77792 flow [2023-08-30 20:07:50,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:50,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:07:50,224 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:07:50,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 20:07:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-08-30 20:07:50,426 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:07:50,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:07:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash -227284521, now seen corresponding path program 61 times [2023-08-30 20:07:50,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:07:50,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321587590] [2023-08-30 20:07:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:07:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:07:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:07:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:07:51,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:07:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321587590] [2023-08-30 20:07:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321587590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:07:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201684364] [2023-08-30 20:07:51,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:07:51,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:07:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:07:51,264 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:07:51,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 20:07:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:07:51,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-30 20:07:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:07:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:07:51,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:07:51,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:07:51,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-30 20:07:52,075 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:07:52,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-30 20:07:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:07:52,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201684364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:07:52,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:07:52,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-30 20:07:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438426527] [2023-08-30 20:07:52,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:07:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:07:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:07:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:07:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 20:07:54,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 20:07:54,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 979 places, 2446 transitions, 77792 flow. Second operand has 35 states, 35 states have (on average 69.6) internal successors, (2436), 35 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:54,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:07:54,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 20:07:54,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:08:06,627 INFO L130 PetriNetUnfolder]: 6165/11771 cut-off events. [2023-08-30 20:08:06,627 INFO L131 PetriNetUnfolder]: For 1623801/1623801 co-relation queries the response was YES. [2023-08-30 20:08:06,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199305 conditions, 11771 events. 6165/11771 cut-off events. For 1623801/1623801 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 100101 event pairs, 895 based on Foata normal form. 6/11777 useless extension candidates. Maximal degree in co-relation 198989. Up to 10942 conditions per place. [2023-08-30 20:08:06,850 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2248 selfloop transitions, 371 changer transitions 4/2623 dead transitions. [2023-08-30 20:08:06,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1011 places, 2623 transitions, 90719 flow [2023-08-30 20:08:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 20:08:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 20:08:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2386 transitions. [2023-08-30 20:08:06,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3509855839952927 [2023-08-30 20:08:06,852 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2386 transitions. [2023-08-30 20:08:06,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2386 transitions. [2023-08-30 20:08:06,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:08:06,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2386 transitions. [2023-08-30 20:08:06,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.3030303030303) internal successors, (2386), 33 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:06,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:06,857 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:06,857 INFO L175 Difference]: Start difference. First operand has 979 places, 2446 transitions, 77792 flow. Second operand 33 states and 2386 transitions. [2023-08-30 20:08:06,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1011 places, 2623 transitions, 90719 flow [2023-08-30 20:08:22,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 991 places, 2623 transitions, 88335 flow, removed 839 selfloop flow, removed 20 redundant places. [2023-08-30 20:08:22,755 INFO L231 Difference]: Finished difference. Result has 995 places, 2549 transitions, 82358 flow [2023-08-30 20:08:22,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=75547, PETRI_DIFFERENCE_MINUEND_PLACES=959, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=82358, PETRI_PLACES=995, PETRI_TRANSITIONS=2549} [2023-08-30 20:08:22,757 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 974 predicate places. [2023-08-30 20:08:22,758 INFO L495 AbstractCegarLoop]: Abstraction has has 995 places, 2549 transitions, 82358 flow [2023-08-30 20:08:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 69.6) internal successors, (2436), 35 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:22,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:08:22,758 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:08:22,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-30 20:08:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-30 20:08:22,964 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:08:22,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:08:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1023542659, now seen corresponding path program 62 times [2023-08-30 20:08:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:08:22,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108603501] [2023-08-30 20:08:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:08:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:08:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:08:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:08:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:08:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108603501] [2023-08-30 20:08:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108603501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:08:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44521133] [2023-08-30 20:08:23,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:08:23,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:08:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:08:23,533 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:08:23,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-30 20:08:23,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:08:23,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:08:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-08-30 20:08:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:08:23,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:08:23,917 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 15 treesize of output 14 [2023-08-30 20:08:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:08:23,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:08:24,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:08:24,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-08-30 20:08:24,745 INFO L321 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2023-08-30 20:08:24,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 23 [2023-08-30 20:08:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:08:24,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44521133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:08:24,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:08:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2023-08-30 20:08:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437908073] [2023-08-30 20:08:24,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:08:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:08:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:08:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:08:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 20:08:27,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:08:28,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-08-30 20:08:28,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 2549 transitions, 82358 flow. Second operand has 35 states, 35 states have (on average 73.45714285714286) internal successors, (2571), 35 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:28,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:08:28,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-08-30 20:08:28,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:08:43,171 INFO L130 PetriNetUnfolder]: 6335/12101 cut-off events. [2023-08-30 20:08:43,171 INFO L131 PetriNetUnfolder]: For 1705703/1705703 co-relation queries the response was YES. [2023-08-30 20:08:43,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206162 conditions, 12101 events. 6335/12101 cut-off events. For 1705703/1705703 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 103469 event pairs, 855 based on Foata normal form. 4/12105 useless extension candidates. Maximal degree in co-relation 205842. Up to 10657 conditions per place. [2023-08-30 20:08:43,404 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 2098 selfloop transitions, 623 changer transitions 7/2728 dead transitions. [2023-08-30 20:08:43,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1049 places, 2728 transitions, 94374 flow [2023-08-30 20:08:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 20:08:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 20:08:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4192 transitions. [2023-08-30 20:08:43,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369991173874669 [2023-08-30 20:08:43,407 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4192 transitions. [2023-08-30 20:08:43,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4192 transitions. [2023-08-30 20:08:43,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:08:43,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4192 transitions. [2023-08-30 20:08:43,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 76.21818181818182) internal successors, (4192), 55 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:43,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 206.0) internal successors, (11536), 56 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:43,415 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 206.0) internal successors, (11536), 56 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:43,415 INFO L175 Difference]: Start difference. First operand has 995 places, 2549 transitions, 82358 flow. Second operand 55 states and 4192 transitions. [2023-08-30 20:08:43,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1049 places, 2728 transitions, 94374 flow [2023-08-30 20:09:00,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1036 places, 2728 transitions, 92500 flow, removed 862 selfloop flow, removed 13 redundant places. [2023-08-30 20:09:00,968 INFO L231 Difference]: Finished difference. Result has 1044 places, 2615 transitions, 86388 flow [2023-08-30 20:09:00,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80484, PETRI_DIFFERENCE_MINUEND_PLACES=982, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=86388, PETRI_PLACES=1044, PETRI_TRANSITIONS=2615} [2023-08-30 20:09:00,970 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1023 predicate places. [2023-08-30 20:09:00,970 INFO L495 AbstractCegarLoop]: Abstraction has has 1044 places, 2615 transitions, 86388 flow [2023-08-30 20:09:00,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.45714285714286) internal successors, (2571), 35 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:00,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:09:00,971 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:09:00,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-08-30 20:09:01,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:09:01,171 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:09:01,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:09:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -765140099, now seen corresponding path program 63 times [2023-08-30 20:09:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:09:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513788269] [2023-08-30 20:09:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:09:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:09:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:09:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:01,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:09:01,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513788269] [2023-08-30 20:09:01,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513788269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:09:01,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693804628] [2023-08-30 20:09:01,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:09:01,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:09:01,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:09:01,828 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:09:01,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-30 20:09:02,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:09:02,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:09:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-30 20:09:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:09:02,120 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 13 treesize of output 9 [2023-08-30 20:09:02,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:09:02,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:09:02,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:09:02,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-08-30 20:09:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:09:02,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:09:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:09:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693804628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:09:03,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:09:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 38 [2023-08-30 20:09:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452500627] [2023-08-30 20:09:03,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:09:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 20:09:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:09:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 20:09:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 20:09:07,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-08-30 20:09:07,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1044 places, 2615 transitions, 86388 flow. Second operand has 40 states, 40 states have (on average 69.5) internal successors, (2780), 40 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:07,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:09:07,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-08-30 20:09:07,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:09:23,330 INFO L130 PetriNetUnfolder]: 6442/12334 cut-off events. [2023-08-30 20:09:23,330 INFO L131 PetriNetUnfolder]: For 1874479/1874479 co-relation queries the response was YES. [2023-08-30 20:09:23,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215765 conditions, 12334 events. 6442/12334 cut-off events. For 1874479/1874479 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 106103 event pairs, 899 based on Foata normal form. 6/12340 useless extension candidates. Maximal degree in co-relation 215436. Up to 11259 conditions per place. [2023-08-30 20:09:23,567 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 2256 selfloop transitions, 467 changer transitions 10/2733 dead transitions. [2023-08-30 20:09:23,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1086 places, 2733 transitions, 97107 flow [2023-08-30 20:09:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 20:09:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 20:09:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3105 transitions. [2023-08-30 20:09:23,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35053059381350193 [2023-08-30 20:09:23,569 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3105 transitions. [2023-08-30 20:09:23,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3105 transitions. [2023-08-30 20:09:23,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:09:23,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3105 transitions. [2023-08-30 20:09:23,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 72.20930232558139) internal successors, (3105), 43 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:23,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 206.0) internal successors, (9064), 44 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:23,575 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 206.0) internal successors, (9064), 44 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:23,575 INFO L175 Difference]: Start difference. First operand has 1044 places, 2615 transitions, 86388 flow. Second operand 43 states and 3105 transitions. [2023-08-30 20:09:23,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1086 places, 2733 transitions, 97107 flow [2023-08-30 20:09:43,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1049 places, 2733 transitions, 94248 flow, removed 1194 selfloop flow, removed 37 redundant places. [2023-08-30 20:09:44,035 INFO L231 Difference]: Finished difference. Result has 1059 places, 2653 transitions, 88148 flow [2023-08-30 20:09:44,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=83613, PETRI_DIFFERENCE_MINUEND_PLACES=1007, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=88148, PETRI_PLACES=1059, PETRI_TRANSITIONS=2653} [2023-08-30 20:09:44,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1038 predicate places. [2023-08-30 20:09:44,038 INFO L495 AbstractCegarLoop]: Abstraction has has 1059 places, 2653 transitions, 88148 flow [2023-08-30 20:09:44,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 69.5) internal successors, (2780), 40 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:44,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:09:44,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:09:44,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-30 20:09:44,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 20:09:44,245 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:09:44,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:09:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -518482499, now seen corresponding path program 64 times [2023-08-30 20:09:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:09:44,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497334540] [2023-08-30 20:09:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:09:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:09:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:09:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:09:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497334540] [2023-08-30 20:09:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497334540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:09:44,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876812363] [2023-08-30 20:09:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:09:44,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:09:44,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:09:44,885 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:09:44,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-30 20:09:45,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:09:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:09:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-30 20:09:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:09:45,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:09:45,449 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 15 treesize of output 14 [2023-08-30 20:09:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:45,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:09:46,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:09:46,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 109 [2023-08-30 20:09:46,526 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-30 20:09:46,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-08-30 20:09:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:46,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876812363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:09:46,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:09:46,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-08-30 20:09:46,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210270628] [2023-08-30 20:09:46,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:09:46,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 20:09:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:09:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 20:09:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 20:09:49,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-08-30 20:09:49,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1059 places, 2653 transitions, 88148 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:49,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:09:49,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-08-30 20:09:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:04,916 INFO L130 PetriNetUnfolder]: 6547/12532 cut-off events. [2023-08-30 20:10:04,917 INFO L131 PetriNetUnfolder]: For 2112203/2112203 co-relation queries the response was YES. [2023-08-30 20:10:05,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224559 conditions, 12532 events. 6547/12532 cut-off events. For 2112203/2112203 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 108038 event pairs, 909 based on Foata normal form. 6/12538 useless extension candidates. Maximal degree in co-relation 224219. Up to 11627 conditions per place. [2023-08-30 20:10:05,305 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 2363 selfloop transitions, 439 changer transitions 6/2808 dead transitions. [2023-08-30 20:10:05,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 2808 transitions, 98372 flow [2023-08-30 20:10:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 20:10:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 20:10:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4052 transitions. [2023-08-30 20:10:05,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782673637042569 [2023-08-30 20:10:05,310 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4052 transitions. [2023-08-30 20:10:05,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4052 transitions. [2023-08-30 20:10:05,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:05,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4052 transitions. [2023-08-30 20:10:05,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 77.92307692307692) internal successors, (4052), 52 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:05,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 206.0) internal successors, (10918), 53 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:05,321 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 206.0) internal successors, (10918), 53 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:05,321 INFO L175 Difference]: Start difference. First operand has 1059 places, 2653 transitions, 88148 flow. Second operand 52 states and 4052 transitions. [2023-08-30 20:10:05,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 2808 transitions, 98372 flow Killed by 15