./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-poker-hand-symm.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/chl-poker-hand-symm.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 83dad307cba3d7607e136206fd160e874fd8a32bc88cbef3e5973f117a7651cc --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 19:11:45,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:11:45,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:11:45,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:11:45,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:11:45,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:11:45,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:11:45,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:11:45,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:11:45,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:11:45,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:11:45,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:11:45,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:11:45,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:11:45,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:11:45,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:11:45,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:11:45,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:11:45,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:11:45,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:11:45,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:11:45,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:11:45,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:11:45,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:11:45,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:11:45,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:11:45,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:11:45,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:11:45,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:11:45,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:11:45,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:11:45,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:11:45,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:11:45,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:11:45,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:11:45,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:11:45,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:11:45,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:11:45,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:11:45,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:11:45,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:11:45,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:11:45,172 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:11:45,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:11:45,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:11:45,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:11:45,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:11:45,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:11:45,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:11:45,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:11:45,176 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:11:45,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:11:45,177 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:11:45,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:11:45,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:11:45,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:11:45,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:11:45,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:11:45,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:11:45,179 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:11:45,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:11:45,179 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:11:45,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:11:45,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:11:45,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:11:45,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:11:45,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:11:45,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:11:45,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:11:45,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:11:45,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:11:45,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:11:45,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:11:45,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:11:45,182 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:11:45,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:11:45,183 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:11:45,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83dad307cba3d7607e136206fd160e874fd8a32bc88cbef3e5973f117a7651cc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:11:45,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:11:45,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:11:45,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:11:45,502 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:11:45,503 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:11:45,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-poker-hand-symm.wvr.c [2023-08-30 19:11:46,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:11:46,822 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:11:46,823 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-poker-hand-symm.wvr.c [2023-08-30 19:11:46,846 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8fd0c183/0d6662114c314adbb10c2f64ffa25cba/FLAGa10d89eb0 [2023-08-30 19:11:46,862 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8fd0c183/0d6662114c314adbb10c2f64ffa25cba [2023-08-30 19:11:46,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:11:46,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:11:46,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:11:46,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:11:46,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:11:46,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:11:46" (1/1) ... [2023-08-30 19:11:46,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16edf523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:46, skipping insertion in model container [2023-08-30 19:11:46,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:11:46" (1/1) ... [2023-08-30 19:11:46,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:11:46,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:11:47,188 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/chl-poker-hand-symm.wvr.c[12821,12834] [2023-08-30 19:11:47,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:11:47,220 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:11:47,275 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/chl-poker-hand-symm.wvr.c[12821,12834] [2023-08-30 19:11:47,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:11:47,285 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:11:47,285 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:11:47,291 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:11:47,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47 WrapperNode [2023-08-30 19:11:47,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:11:47,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:11:47,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:11:47,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:11:47,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,388 INFO L138 Inliner]: procedures = 25, calls = 307, calls flagged for inlining = 69, calls inlined = 97, statements flattened = 1546 [2023-08-30 19:11:47,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:11:47,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:11:47,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:11:47,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:11:47,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:11:47,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:11:47,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:11:47,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:11:47,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (1/1) ... [2023-08-30 19:11:47,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:11:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:11:47,518 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 19:11:47,550 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 19:11:47,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:11:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:11:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:11:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:11:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:11:47,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:11:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:11:47,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:11:47,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:11:47,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:11:47,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:11:47,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:11:47,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:11:47,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:11:47,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:11:47,564 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 19:11:47,725 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:11:47,727 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:11:49,017 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:11:50,428 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:11:50,428 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-30 19:11:50,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:11:50 BoogieIcfgContainer [2023-08-30 19:11:50,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:11:50,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:11:50,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:11:50,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:11:50,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:11:46" (1/3) ... [2023-08-30 19:11:50,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c6ae43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:11:50, skipping insertion in model container [2023-08-30 19:11:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:47" (2/3) ... [2023-08-30 19:11:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c6ae43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:11:50, skipping insertion in model container [2023-08-30 19:11:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:11:50" (3/3) ... [2023-08-30 19:11:50,440 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-poker-hand-symm.wvr.c [2023-08-30 19:11:50,447 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:11:50,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:11:50,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:11:50,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:11:50,751 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:11:50,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 455 transitions, 926 flow [2023-08-30 19:11:50,963 INFO L130 PetriNetUnfolder]: 53/453 cut-off events. [2023-08-30 19:11:50,963 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:11:50,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 453 events. 53/453 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 375. Up to 7 conditions per place. [2023-08-30 19:11:50,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 409 places, 455 transitions, 926 flow [2023-08-30 19:11:50,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 445 transitions, 902 flow [2023-08-30 19:11:50,984 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:11:50,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 445 transitions, 902 flow [2023-08-30 19:11:51,002 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 445 transitions, 902 flow [2023-08-30 19:11:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 445 transitions, 902 flow [2023-08-30 19:11:51,087 INFO L130 PetriNetUnfolder]: 53/445 cut-off events. [2023-08-30 19:11:51,088 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:11:51,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 445 events. 53/445 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 375. Up to 7 conditions per place. [2023-08-30 19:11:51,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 7700 [2023-08-30 19:12:43,376 INFO L134 LiptonReduction]: Checked pairs total: 7716 [2023-08-30 19:12:43,378 INFO L136 LiptonReduction]: Total number of compositions: 528 [2023-08-30 19:12:43,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:12:43,404 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;@255d6eec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:12:43,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:12:43,464 INFO L130 PetriNetUnfolder]: 16/38 cut-off events. [2023-08-30 19:12:43,465 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:12:43,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:12:43,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:12:43,467 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 19:12:43,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:12:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1344797690, now seen corresponding path program 1 times [2023-08-30 19:12:43,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:12:43,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570732807] [2023-08-30 19:12:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:12:43,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:12:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:12:44,254 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 19:12:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:12:44,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570732807] [2023-08-30 19:12:44,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570732807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:12:44,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:12:44,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:12:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263320479] [2023-08-30 19:12:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:12:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:12:44,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:12:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:12:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:12:44,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 983 [2023-08-30 19:12:44,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 373.3333333333333) internal successors, (1120), 3 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:44,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:12:44,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 983 [2023-08-30 19:12:44,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:12:45,017 INFO L130 PetriNetUnfolder]: 133/196 cut-off events. [2023-08-30 19:12:45,017 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 19:12:45,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 196 events. 133/196 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 372 event pairs, 45 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 308. Up to 193 conditions per place. [2023-08-30 19:12:45,022 INFO L137 encePairwiseOnDemand]: 974/983 looper letters, 35 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2023-08-30 19:12:45,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 184 flow [2023-08-30 19:12:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:12:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:12:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1148 transitions. [2023-08-30 19:12:45,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389284503221431 [2023-08-30 19:12:45,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1148 transitions. [2023-08-30 19:12:45,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1148 transitions. [2023-08-30 19:12:45,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:12:45,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1148 transitions. [2023-08-30 19:12:45,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.6666666666667) internal successors, (1148), 3 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:45,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:45,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:45,069 INFO L175 Difference]: Start difference. First operand has 30 places, 39 transitions, 90 flow. Second operand 3 states and 1148 transitions. [2023-08-30 19:12:45,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 184 flow [2023-08-30 19:12:45,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:12:45,073 INFO L231 Difference]: Finished difference. Result has 29 places, 43 transitions, 124 flow [2023-08-30 19:12:45,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=29, PETRI_TRANSITIONS=43} [2023-08-30 19:12:45,077 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-08-30 19:12:45,078 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 43 transitions, 124 flow [2023-08-30 19:12:45,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 373.3333333333333) internal successors, (1120), 3 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:45,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:12:45,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:12:45,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:12:45,080 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 19:12:45,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:12:45,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1708311211, now seen corresponding path program 1 times [2023-08-30 19:12:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:12:45,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264666758] [2023-08-30 19:12:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:12:45,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:12:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:12:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:12:45,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:12:45,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264666758] [2023-08-30 19:12:45,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264666758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:12:45,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015602535] [2023-08-30 19:12:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:12:45,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:12:45,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:12:45,445 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 19:12:45,457 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 19:12:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:12:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:12:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:12:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 19:12:46,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:12:46,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015602535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:12:46,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:12:46,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-30 19:12:46,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492948259] [2023-08-30 19:12:46,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:12:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:12:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:12:46,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:12:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:12:46,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 983 [2023-08-30 19:12:46,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 43 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:46,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:12:46,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 983 [2023-08-30 19:12:46,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:12:46,679 INFO L130 PetriNetUnfolder]: 133/200 cut-off events. [2023-08-30 19:12:46,679 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:12:46,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 200 events. 133/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 373 event pairs, 45 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 373. Up to 197 conditions per place. [2023-08-30 19:12:46,681 INFO L137 encePairwiseOnDemand]: 973/983 looper letters, 39 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-08-30 19:12:46,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 226 flow [2023-08-30 19:12:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:12:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:12:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1148 transitions. [2023-08-30 19:12:46,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389284503221431 [2023-08-30 19:12:46,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1148 transitions. [2023-08-30 19:12:46,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1148 transitions. [2023-08-30 19:12:46,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:12:46,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1148 transitions. [2023-08-30 19:12:46,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.6666666666667) internal successors, (1148), 3 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:46,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:46,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:46,700 INFO L175 Difference]: Start difference. First operand has 29 places, 43 transitions, 124 flow. Second operand 3 states and 1148 transitions. [2023-08-30 19:12:46,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 226 flow [2023-08-30 19:12:46,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:12:46,702 INFO L231 Difference]: Finished difference. Result has 31 places, 47 transitions, 160 flow [2023-08-30 19:12:46,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=31, PETRI_TRANSITIONS=47} [2023-08-30 19:12:46,703 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-08-30 19:12:46,703 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 47 transitions, 160 flow [2023-08-30 19:12:46,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:46,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:12:46,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:12:46,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:12:46,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:12:46,918 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 19:12:46,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:12:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -457718845, now seen corresponding path program 1 times [2023-08-30 19:12:46,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:12:46,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231953971] [2023-08-30 19:12:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:12:46,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:12:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:12:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 19:12:47,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:12:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231953971] [2023-08-30 19:12:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231953971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:12:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380231262] [2023-08-30 19:12:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:12:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:12:47,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:12:47,261 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 19:12:47,263 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 19:12:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:12:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:12:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:12:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 19:12:47,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:12:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 19:12:47,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380231262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:12:47,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:12:47,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-30 19:12:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026760190] [2023-08-30 19:12:47,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:12:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:12:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:12:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:12:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:12:48,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-08-30 19:12:48,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 47 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 355.625) internal successors, (2845), 8 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:48,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:12:48,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-08-30 19:12:48,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:12:48,630 INFO L130 PetriNetUnfolder]: 133/224 cut-off events. [2023-08-30 19:12:48,630 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:12:48,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 224 events. 133/224 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 373 event pairs, 45 based on Foata normal form. 12/152 useless extension candidates. Maximal degree in co-relation 393. Up to 193 conditions per place. [2023-08-30 19:12:48,632 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 31 selfloop transitions, 40 changer transitions 0/71 dead transitions. [2023-08-30 19:12:48,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 398 flow [2023-08-30 19:12:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:12:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:12:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2903 transitions. [2023-08-30 19:12:48,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691505595116989 [2023-08-30 19:12:48,640 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2903 transitions. [2023-08-30 19:12:48,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2903 transitions. [2023-08-30 19:12:48,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:12:48,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2903 transitions. [2023-08-30 19:12:48,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 362.875) internal successors, (2903), 8 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:48,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 983.0) internal successors, (8847), 9 states have internal predecessors, (8847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:48,663 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 983.0) internal successors, (8847), 9 states have internal predecessors, (8847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:48,663 INFO L175 Difference]: Start difference. First operand has 31 places, 47 transitions, 160 flow. Second operand 8 states and 2903 transitions. [2023-08-30 19:12:48,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 398 flow [2023-08-30 19:12:48,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 71 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:12:48,666 INFO L231 Difference]: Finished difference. Result has 40 places, 71 transitions, 390 flow [2023-08-30 19:12:48,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=40, PETRI_TRANSITIONS=71} [2023-08-30 19:12:48,667 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-30 19:12:48,667 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 71 transitions, 390 flow [2023-08-30 19:12:48,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 355.625) internal successors, (2845), 8 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:12:48,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:12:48,669 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:12:48,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:12:48,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 19:12:48,880 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 19:12:48,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:12:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 141857420, now seen corresponding path program 2 times [2023-08-30 19:12:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:12:48,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235495693] [2023-08-30 19:12:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:12:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:12:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:12:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-30 19:12:49,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:12:49,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235495693] [2023-08-30 19:12:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235495693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:12:49,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938499563] [2023-08-30 19:12:49,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:12:49,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:12:49,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:12:49,265 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 19:12:49,275 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 19:12:49,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:12:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:12:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:12:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:12:55,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:12:55,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1365 treesize of output 1191 [2023-08-30 19:13:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-08-30 19:13:28,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:13:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938499563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:28,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:13:28,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-30 19:13:28,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745259270] [2023-08-30 19:13:28,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:28,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:13:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:13:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:13:29,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 983 [2023-08-30 19:13:29,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 71 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:29,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:29,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 983 [2023-08-30 19:13:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:29,888 INFO L130 PetriNetUnfolder]: 220/356 cut-off events. [2023-08-30 19:13:29,889 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 19:13:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 356 events. 220/356 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 889 event pairs, 29 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 678. Up to 211 conditions per place. [2023-08-30 19:13:29,890 INFO L137 encePairwiseOnDemand]: 968/983 looper letters, 85 selfloop transitions, 13 changer transitions 6/104 dead transitions. [2023-08-30 19:13:29,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 670 flow [2023-08-30 19:13:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1950 transitions. [2023-08-30 19:13:29,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967446592065107 [2023-08-30 19:13:29,896 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1950 transitions. [2023-08-30 19:13:29,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1950 transitions. [2023-08-30 19:13:29,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:29,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1950 transitions. [2023-08-30 19:13:29,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 390.0) internal successors, (1950), 5 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:29,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:29,910 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:29,910 INFO L175 Difference]: Start difference. First operand has 40 places, 71 transitions, 390 flow. Second operand 5 states and 1950 transitions. [2023-08-30 19:13:29,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 670 flow [2023-08-30 19:13:29,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 588 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-30 19:13:29,915 INFO L231 Difference]: Finished difference. Result has 44 places, 82 transitions, 398 flow [2023-08-30 19:13:29,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=44, PETRI_TRANSITIONS=82} [2023-08-30 19:13:29,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-30 19:13:29,916 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 82 transitions, 398 flow [2023-08-30 19:13:29,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:29,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:29,917 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:13:29,929 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 19:13:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:13:30,127 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 19:13:30,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1414425790, now seen corresponding path program 3 times [2023-08-30 19:13:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:30,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676307322] [2023-08-30 19:13:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-30 19:13:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676307322] [2023-08-30 19:13:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676307322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:13:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144575110] [2023-08-30 19:13:30,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:13:30,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:13:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:13:30,596 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 19:13:30,628 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 19:13:31,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:13:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:13:31,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:13:31,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:13:35,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:13:35,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1350 treesize of output 1176 [2023-08-30 19:15:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-08-30 19:15:29,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:15:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144575110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:15:29,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:15:29,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-30 19:15:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047631401] [2023-08-30 19:15:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:15:29,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:15:29,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:15:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:15:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:15:30,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 983 [2023-08-30 19:15:30,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 82 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:30,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:15:30,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 983 [2023-08-30 19:15:30,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:15:30,759 INFO L130 PetriNetUnfolder]: 222/370 cut-off events. [2023-08-30 19:15:30,759 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 19:15:30,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 370 events. 222/370 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 954 event pairs, 31 based on Foata normal form. 3/259 useless extension candidates. Maximal degree in co-relation 1128. Up to 242 conditions per place. [2023-08-30 19:15:30,761 INFO L137 encePairwiseOnDemand]: 969/983 looper letters, 86 selfloop transitions, 12 changer transitions 5/103 dead transitions. [2023-08-30 19:15:30,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 670 flow [2023-08-30 19:15:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:15:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:15:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1948 transitions. [2023-08-30 19:15:30,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963377416073245 [2023-08-30 19:15:30,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1948 transitions. [2023-08-30 19:15:30,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1948 transitions. [2023-08-30 19:15:30,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:15:30,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1948 transitions. [2023-08-30 19:15:30,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 389.6) internal successors, (1948), 5 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:30,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:30,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:30,778 INFO L175 Difference]: Start difference. First operand has 44 places, 82 transitions, 398 flow. Second operand 5 states and 1948 transitions. [2023-08-30 19:15:30,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 670 flow [2023-08-30 19:15:30,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 666 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 19:15:30,782 INFO L231 Difference]: Finished difference. Result has 48 places, 82 transitions, 430 flow [2023-08-30 19:15:30,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=48, PETRI_TRANSITIONS=82} [2023-08-30 19:15:30,783 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2023-08-30 19:15:30,783 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 82 transitions, 430 flow [2023-08-30 19:15:30,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:30,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:15:30,784 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:15:30,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:15:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:30,992 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 19:15:30,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:15:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1787475852, now seen corresponding path program 4 times [2023-08-30 19:15:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:15:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716893772] [2023-08-30 19:15:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:15:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:15:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:15:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-30 19:15:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:15:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716893772] [2023-08-30 19:15:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716893772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369685640] [2023-08-30 19:15:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:15:31,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:15:31,333 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 19:15:31,335 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 19:15:31,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:15:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:15:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:15:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:15:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-30 19:15:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:15:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-30 19:15:32,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369685640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:15:32,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:15:32,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 19:15:32,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734427204] [2023-08-30 19:15:32,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:15:32,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:15:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:15:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:15:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:15:32,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-08-30 19:15:32,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 82 transitions, 430 flow. Second operand has 12 states, 12 states have (on average 354.0) internal successors, (4248), 12 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:32,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:15:32,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-08-30 19:15:32,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:15:33,040 INFO L130 PetriNetUnfolder]: 221/368 cut-off events. [2023-08-30 19:15:33,040 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2023-08-30 19:15:33,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1265 conditions, 368 events. 221/368 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 912 event pairs, 69 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 1243. Up to 333 conditions per place. [2023-08-30 19:15:33,042 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 42 selfloop transitions, 44 changer transitions 0/86 dead transitions. [2023-08-30 19:15:33,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 626 flow [2023-08-30 19:15:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:15:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:15:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3940 transitions. [2023-08-30 19:15:33,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643762138167021 [2023-08-30 19:15:33,052 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3940 transitions. [2023-08-30 19:15:33,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3940 transitions. [2023-08-30 19:15:33,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:15:33,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3940 transitions. [2023-08-30 19:15:33,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 358.1818181818182) internal successors, (3940), 11 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:33,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 983.0) internal successors, (11796), 12 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:33,083 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 983.0) internal successors, (11796), 12 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:33,083 INFO L175 Difference]: Start difference. First operand has 48 places, 82 transitions, 430 flow. Second operand 11 states and 3940 transitions. [2023-08-30 19:15:33,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 626 flow [2023-08-30 19:15:33,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 613 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 19:15:33,088 INFO L231 Difference]: Finished difference. Result has 56 places, 86 transitions, 547 flow [2023-08-30 19:15:33,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=547, PETRI_PLACES=56, PETRI_TRANSITIONS=86} [2023-08-30 19:15:33,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-08-30 19:15:33,091 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 86 transitions, 547 flow [2023-08-30 19:15:33,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 354.0) internal successors, (4248), 12 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:33,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:15:33,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:15:33,104 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 19:15:33,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:33,302 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 19:15:33,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:15:33,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1712025184, now seen corresponding path program 5 times [2023-08-30 19:15:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:15:33,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943518336] [2023-08-30 19:15:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:15:33,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:15:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:15:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-08-30 19:15:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:15:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943518336] [2023-08-30 19:15:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943518336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770549641] [2023-08-30 19:15:33,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:15:33,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:33,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:15:33,677 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 19:15:33,700 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 19:18:18,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:18:18,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:18:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 19:18:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:18:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-08-30 19:18:18,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:18:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-08-30 19:18:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770549641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:18:18,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:18:18,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 19:18:18,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808587159] [2023-08-30 19:18:18,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:18:18,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:18:18,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:18:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:18:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:18:19,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-08-30 19:18:19,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 86 transitions, 547 flow. Second operand has 20 states, 20 states have (on average 353.25) internal successors, (7065), 20 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:19,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:18:19,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-08-30 19:18:19,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:18:20,331 INFO L130 PetriNetUnfolder]: 221/382 cut-off events. [2023-08-30 19:18:20,331 INFO L131 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2023-08-30 19:18:20,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 382 events. 221/382 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 901 event pairs, 69 based on Foata normal form. 14/288 useless extension candidates. Maximal degree in co-relation 1099. Up to 333 conditions per place. [2023-08-30 19:18:20,333 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 42 selfloop transitions, 58 changer transitions 0/100 dead transitions. [2023-08-30 19:18:20,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 859 flow [2023-08-30 19:18:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:18:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:18:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 5017 transitions. [2023-08-30 19:18:20,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645545705566051 [2023-08-30 19:18:20,340 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 5017 transitions. [2023-08-30 19:18:20,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 5017 transitions. [2023-08-30 19:18:20,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:18:20,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 5017 transitions. [2023-08-30 19:18:20,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 358.35714285714283) internal successors, (5017), 14 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:20,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 983.0) internal successors, (14745), 15 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:20,363 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 983.0) internal successors, (14745), 15 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:20,364 INFO L175 Difference]: Start difference. First operand has 56 places, 86 transitions, 547 flow. Second operand 14 states and 5017 transitions. [2023-08-30 19:18:20,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 859 flow [2023-08-30 19:18:20,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 779 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 19:18:20,368 INFO L231 Difference]: Finished difference. Result has 70 places, 100 transitions, 793 flow [2023-08-30 19:18:20,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=793, PETRI_PLACES=70, PETRI_TRANSITIONS=100} [2023-08-30 19:18:20,368 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2023-08-30 19:18:20,369 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 100 transitions, 793 flow [2023-08-30 19:18:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 353.25) internal successors, (7065), 20 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:20,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:18:20,370 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:18:20,403 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 19:18:20,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:20,597 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 19:18:20,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:18:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -595377332, now seen corresponding path program 6 times [2023-08-30 19:18:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:18:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450727680] [2023-08-30 19:18:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:20,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:18:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-08-30 19:18:21,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:18:21,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450727680] [2023-08-30 19:18:21,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450727680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:18:21,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114859713] [2023-08-30 19:18:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:18:21,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:21,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:18:21,170 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 19:18:21,173 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 19:18:21,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 19:18:21,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:18:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:18:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:18:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:18:24,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:18:24,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:18:24,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:18:24,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:18:24,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:18:24,953 INFO L321 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2023-08-30 19:18:24,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 446 treesize of output 395 [2023-08-30 19:18:27,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:18:27,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1365 treesize of output 1191 [2023-08-30 19:18:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-08-30 19:18:53,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:18:53,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114859713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:18:53,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:18:53,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2023-08-30 19:18:53,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336669296] [2023-08-30 19:18:53,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:18:53,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:18:53,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:18:53,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:18:53,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:18:54,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 983 [2023-08-30 19:18:54,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 100 transitions, 793 flow. Second operand has 12 states, 12 states have (on average 358.25) internal successors, (4299), 12 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:54,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:18:54,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 983 [2023-08-30 19:18:54,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:18:55,531 INFO L130 PetriNetUnfolder]: 223/394 cut-off events. [2023-08-30 19:18:55,531 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 19:18:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 394 events. 223/394 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1037 event pairs, 26 based on Foata normal form. 5/291 useless extension candidates. Maximal degree in co-relation 1158. Up to 225 conditions per place. [2023-08-30 19:18:55,533 INFO L137 encePairwiseOnDemand]: 969/983 looper letters, 103 selfloop transitions, 12 changer transitions 7/122 dead transitions. [2023-08-30 19:18:55,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 122 transitions, 1112 flow [2023-08-30 19:18:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:18:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:18:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2211 transitions. [2023-08-30 19:18:55,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3748728382502543 [2023-08-30 19:18:55,537 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2211 transitions. [2023-08-30 19:18:55,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2211 transitions. [2023-08-30 19:18:55,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:18:55,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2211 transitions. [2023-08-30 19:18:55,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 368.5) internal successors, (2211), 6 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:55,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 983.0) internal successors, (6881), 7 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:55,545 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 983.0) internal successors, (6881), 7 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:55,545 INFO L175 Difference]: Start difference. First operand has 70 places, 100 transitions, 793 flow. Second operand 6 states and 2211 transitions. [2023-08-30 19:18:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 122 transitions, 1112 flow [2023-08-30 19:18:55,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 1040 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-30 19:18:55,551 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 750 flow [2023-08-30 19:18:55,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=750, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-08-30 19:18:55,552 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2023-08-30 19:18:55,552 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 750 flow [2023-08-30 19:18:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 358.25) internal successors, (4299), 12 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:55,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:18:55,553 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:18:55,561 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 19:18:55,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:55,762 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 19:18:55,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:18:55,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1455469097, now seen corresponding path program 1 times [2023-08-30 19:18:55,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:18:55,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166785500] [2023-08-30 19:18:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:55,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:18:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-08-30 19:18:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:18:56,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166785500] [2023-08-30 19:18:56,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166785500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:18:56,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:18:56,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:18:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531829006] [2023-08-30 19:18:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:18:56,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:18:56,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:18:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:18:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:18:56,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 385 out of 983 [2023-08-30 19:18:56,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:56,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:18:56,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 385 of 983 [2023-08-30 19:18:56,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:18:56,721 INFO L130 PetriNetUnfolder]: 249/438 cut-off events. [2023-08-30 19:18:56,722 INFO L131 PetriNetUnfolder]: For 535/535 co-relation queries the response was YES. [2023-08-30 19:18:56,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 438 events. 249/438 cut-off events. For 535/535 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1190 event pairs, 46 based on Foata normal form. 14/330 useless extension candidates. Maximal degree in co-relation 1699. Up to 275 conditions per place. [2023-08-30 19:18:56,724 INFO L137 encePairwiseOnDemand]: 976/983 looper letters, 117 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2023-08-30 19:18:56,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 1093 flow [2023-08-30 19:18:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:18:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:18:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1213 transitions. [2023-08-30 19:18:56,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41132587317734826 [2023-08-30 19:18:56,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1213 transitions. [2023-08-30 19:18:56,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1213 transitions. [2023-08-30 19:18:56,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:18:56,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1213 transitions. [2023-08-30 19:18:56,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.3333333333333) internal successors, (1213), 3 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:56,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:56,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:56,733 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 750 flow. Second operand 3 states and 1213 transitions. [2023-08-30 19:18:56,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 1093 flow [2023-08-30 19:18:56,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 1044 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 19:18:56,739 INFO L231 Difference]: Finished difference. Result has 74 places, 102 transitions, 759 flow [2023-08-30 19:18:56,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=759, PETRI_PLACES=74, PETRI_TRANSITIONS=102} [2023-08-30 19:18:56,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-08-30 19:18:56,740 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 102 transitions, 759 flow [2023-08-30 19:18:56,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:56,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:18:56,740 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:18:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:18:56,741 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 19:18:56,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:18:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1325857365, now seen corresponding path program 1 times [2023-08-30 19:18:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:18:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944773579] [2023-08-30 19:18:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:18:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-08-30 19:18:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:18:57,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944773579] [2023-08-30 19:18:57,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944773579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:18:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011679562] [2023-08-30 19:18:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:18:57,281 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 19:18:57,307 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 19:18:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:18:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:18:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-08-30 19:18:58,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:18:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-08-30 19:18:58,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011679562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:18:58,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:18:58,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-08-30 19:18:58,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587524965] [2023-08-30 19:18:58,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:18:58,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 19:18:58,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:18:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 19:18:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2023-08-30 19:18:59,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-08-30 19:18:59,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 102 transitions, 759 flow. Second operand has 29 states, 29 states have (on average 352.8965517241379) internal successors, (10234), 29 states have internal predecessors, (10234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:59,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:18:59,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-08-30 19:18:59,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:18:59,737 INFO L130 PetriNetUnfolder]: 249/440 cut-off events. [2023-08-30 19:18:59,737 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-08-30 19:18:59,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 440 events. 249/440 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1150 event pairs, 81 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 1370. Up to 389 conditions per place. [2023-08-30 19:18:59,740 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 44 selfloop transitions, 60 changer transitions 0/104 dead transitions. [2023-08-30 19:18:59,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 987 flow [2023-08-30 19:18:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:18:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:18:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 7113 transitions. [2023-08-30 19:18:59,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36180061037639877 [2023-08-30 19:18:59,751 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 7113 transitions. [2023-08-30 19:18:59,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 7113 transitions. [2023-08-30 19:18:59,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:18:59,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 7113 transitions. [2023-08-30 19:18:59,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 355.65) internal successors, (7113), 20 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:59,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 983.0) internal successors, (20643), 21 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:59,774 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 983.0) internal successors, (20643), 21 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:59,774 INFO L175 Difference]: Start difference. First operand has 74 places, 102 transitions, 759 flow. Second operand 20 states and 7113 transitions. [2023-08-30 19:18:59,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 987 flow [2023-08-30 19:18:59,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 975 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 19:18:59,780 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 897 flow [2023-08-30 19:18:59,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=897, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2023-08-30 19:18:59,780 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-08-30 19:18:59,781 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 897 flow [2023-08-30 19:18:59,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 352.8965517241379) internal successors, (10234), 29 states have internal predecessors, (10234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:59,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:18:59,782 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:18:59,793 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 19:18:59,991 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,SelfDestructingSolverStorable9 [2023-08-30 19:18:59,991 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 19:18:59,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:18:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1454465938, now seen corresponding path program 1 times [2023-08-30 19:18:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:18:59,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746157356] [2023-08-30 19:18:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-08-30 19:19:00,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:00,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746157356] [2023-08-30 19:19:00,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746157356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:00,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:00,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:19:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700071854] [2023-08-30 19:19:00,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:19:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:19:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:19:00,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-08-30 19:19:00,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 897 flow. Second operand has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:00,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:00,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-08-30 19:19:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:00,827 INFO L130 PetriNetUnfolder]: 276/508 cut-off events. [2023-08-30 19:19:00,827 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2023-08-30 19:19:00,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 508 events. 276/508 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1574 event pairs, 88 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1513. Up to 386 conditions per place. [2023-08-30 19:19:00,830 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 115 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-30 19:19:00,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 1191 flow [2023-08-30 19:19:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:19:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:19:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1252 transitions. [2023-08-30 19:19:00,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245506951508986 [2023-08-30 19:19:00,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1252 transitions. [2023-08-30 19:19:00,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1252 transitions. [2023-08-30 19:19:00,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:00,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1252 transitions. [2023-08-30 19:19:00,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 417.3333333333333) internal successors, (1252), 3 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:00,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:00,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:00,835 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 897 flow. Second operand 3 states and 1252 transitions. [2023-08-30 19:19:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 1191 flow [2023-08-30 19:19:00,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 1039 flow, removed 22 selfloop flow, removed 13 redundant places. [2023-08-30 19:19:00,841 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 756 flow [2023-08-30 19:19:00,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=756, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2023-08-30 19:19:00,841 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2023-08-30 19:19:00,842 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 756 flow [2023-08-30 19:19:00,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:00,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:00,842 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:00,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 19:19:00,843 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 19:19:00,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 779212570, now seen corresponding path program 1 times [2023-08-30 19:19:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674390398] [2023-08-30 19:19:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:00,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-08-30 19:19:01,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:01,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674390398] [2023-08-30 19:19:01,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674390398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:01,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:01,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:19:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935339505] [2023-08-30 19:19:01,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:19:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:19:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:19:01,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-08-30 19:19:01,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:01,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:01,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-08-30 19:19:01,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:01,866 INFO L130 PetriNetUnfolder]: 281/525 cut-off events. [2023-08-30 19:19:01,867 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-30 19:19:01,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 525 events. 281/525 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1693 event pairs, 96 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 1626. Up to 358 conditions per place. [2023-08-30 19:19:01,870 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 116 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-08-30 19:19:01,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 1054 flow [2023-08-30 19:19:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:19:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:19:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1252 transitions. [2023-08-30 19:19:01,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245506951508986 [2023-08-30 19:19:01,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1252 transitions. [2023-08-30 19:19:01,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1252 transitions. [2023-08-30 19:19:01,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:01,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1252 transitions. [2023-08-30 19:19:01,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 417.3333333333333) internal successors, (1252), 3 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:01,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:01,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:01,880 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 756 flow. Second operand 3 states and 1252 transitions. [2023-08-30 19:19:01,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 1054 flow [2023-08-30 19:19:01,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 119 transitions, 1051 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:01,885 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 764 flow [2023-08-30 19:19:01,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=764, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2023-08-30 19:19:01,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-08-30 19:19:01,887 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 764 flow [2023-08-30 19:19:01,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:01,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:01,888 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:01,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 19:19:01,888 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 19:19:01,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -750295871, now seen corresponding path program 2 times [2023-08-30 19:19:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:01,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959789872] [2023-08-30 19:19:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-08-30 19:19:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:02,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959789872] [2023-08-30 19:19:02,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959789872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:02,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:02,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:19:02,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372181413] [2023-08-30 19:19:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:02,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:19:02,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:19:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:19:02,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-08-30 19:19:02,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:02,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:02,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-08-30 19:19:02,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:02,970 INFO L130 PetriNetUnfolder]: 303/579 cut-off events. [2023-08-30 19:19:02,971 INFO L131 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2023-08-30 19:19:02,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 579 events. 303/579 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2020 event pairs, 100 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 1840. Up to 395 conditions per place. [2023-08-30 19:19:02,975 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 114 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-30 19:19:02,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1057 flow [2023-08-30 19:19:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:19:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:19:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2023-08-30 19:19:02,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423872499152255 [2023-08-30 19:19:02,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2023-08-30 19:19:02,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2023-08-30 19:19:02,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:02,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2023-08-30 19:19:02,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:02,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:02,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:02,982 INFO L175 Difference]: Start difference. First operand has 84 places, 104 transitions, 764 flow. Second operand 3 states and 1250 transitions. [2023-08-30 19:19:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1057 flow [2023-08-30 19:19:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1053 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:02,987 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 772 flow [2023-08-30 19:19:02,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2023-08-30 19:19:02,989 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-08-30 19:19:02,989 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 772 flow [2023-08-30 19:19:02,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:02,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:02,989 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:02,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 19:19:02,990 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 19:19:02,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -52120250, now seen corresponding path program 1 times [2023-08-30 19:19:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550597204] [2023-08-30 19:19:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-08-30 19:19:06,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:06,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550597204] [2023-08-30 19:19:06,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550597204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:06,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:06,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 19:19:06,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145427792] [2023-08-30 19:19:06,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:06,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:19:06,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:19:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:19:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 983 [2023-08-30 19:19:07,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 772 flow. Second operand has 11 states, 11 states have (on average 360.6363636363636) internal successors, (3967), 11 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:07,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:07,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 983 [2023-08-30 19:19:07,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:07,979 INFO L130 PetriNetUnfolder]: 277/529 cut-off events. [2023-08-30 19:19:07,979 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-08-30 19:19:07,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 529 events. 277/529 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1737 event pairs, 76 based on Foata normal form. 14/426 useless extension candidates. Maximal degree in co-relation 1735. Up to 298 conditions per place. [2023-08-30 19:19:07,983 INFO L137 encePairwiseOnDemand]: 978/983 looper letters, 118 selfloop transitions, 3 changer transitions 1/122 dead transitions. [2023-08-30 19:19:07,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 1097 flow [2023-08-30 19:19:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:19:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:19:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1488 transitions. [2023-08-30 19:19:07,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37843336724313326 [2023-08-30 19:19:07,987 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1488 transitions. [2023-08-30 19:19:07,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1488 transitions. [2023-08-30 19:19:07,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:07,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1488 transitions. [2023-08-30 19:19:07,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 372.0) internal successors, (1488), 4 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 19:19:07,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:07,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:07,993 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 772 flow. Second operand 4 states and 1488 transitions. [2023-08-30 19:19:07,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 1097 flow [2023-08-30 19:19:07,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 1094 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:07,998 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 780 flow [2023-08-30 19:19:07,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=780, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2023-08-30 19:19:07,999 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-08-30 19:19:07,999 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 780 flow [2023-08-30 19:19:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 360.6363636363636) internal successors, (3967), 11 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:08,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:08,000 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 19:19:08,000 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 19:19:08,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1918064962, now seen corresponding path program 1 times [2023-08-30 19:19:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:08,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533868211] [2023-08-30 19:19:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-08-30 19:19:09,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533868211] [2023-08-30 19:19:09,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533868211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:09,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:09,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 19:19:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336689879] [2023-08-30 19:19:09,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:09,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:19:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:19:09,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:19:09,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 983 [2023-08-30 19:19:09,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 370.14285714285717) internal successors, (2591), 7 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:09,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:09,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 983 [2023-08-30 19:19:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:09,909 INFO L130 PetriNetUnfolder]: 223/433 cut-off events. [2023-08-30 19:19:09,910 INFO L131 PetriNetUnfolder]: For 696/696 co-relation queries the response was YES. [2023-08-30 19:19:09,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 433 events. 223/433 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1299 event pairs, 62 based on Foata normal form. 16/376 useless extension candidates. Maximal degree in co-relation 1372. Up to 246 conditions per place. [2023-08-30 19:19:09,913 INFO L137 encePairwiseOnDemand]: 978/983 looper letters, 114 selfloop transitions, 3 changer transitions 1/118 dead transitions. [2023-08-30 19:19:09,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1076 flow [2023-08-30 19:19:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:19:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:19:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1517 transitions. [2023-08-30 19:19:09,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858087487283825 [2023-08-30 19:19:09,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1517 transitions. [2023-08-30 19:19:09,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1517 transitions. [2023-08-30 19:19:09,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:09,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1517 transitions. [2023-08-30 19:19:09,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 379.25) internal successors, (1517), 4 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:09,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:09,920 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:09,920 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 780 flow. Second operand 4 states and 1517 transitions. [2023-08-30 19:19:09,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1076 flow [2023-08-30 19:19:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 1057 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 19:19:09,925 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 760 flow [2023-08-30 19:19:09,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=760, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2023-08-30 19:19:09,926 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-08-30 19:19:09,926 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 760 flow [2023-08-30 19:19:09,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 370.14285714285717) internal successors, (2591), 7 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:09,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:09,927 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 19:19:09,927 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 19:19:09,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2001024701, now seen corresponding path program 1 times [2023-08-30 19:19:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:09,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430507076] [2023-08-30 19:19:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-08-30 19:19:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430507076] [2023-08-30 19:19:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430507076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:10,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:19:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480467758] [2023-08-30 19:19:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:10,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:19:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:19:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:19:10,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-08-30 19:19:10,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 760 flow. Second operand has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:10,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:10,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-08-30 19:19:10,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:10,584 INFO L130 PetriNetUnfolder]: 232/452 cut-off events. [2023-08-30 19:19:10,585 INFO L131 PetriNetUnfolder]: For 560/560 co-relation queries the response was YES. [2023-08-30 19:19:10,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 452 events. 232/452 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1357 event pairs, 87 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1397. Up to 344 conditions per place. [2023-08-30 19:19:10,588 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 112 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-08-30 19:19:10,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 115 transitions, 1041 flow [2023-08-30 19:19:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:19:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:19:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1246 transitions. [2023-08-30 19:19:10,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225161071549678 [2023-08-30 19:19:10,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1246 transitions. [2023-08-30 19:19:10,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1246 transitions. [2023-08-30 19:19:10,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:10,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1246 transitions. [2023-08-30 19:19:10,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 415.3333333333333) internal successors, (1246), 3 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:10,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:10,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:10,598 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 760 flow. Second operand 3 states and 1246 transitions. [2023-08-30 19:19:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 115 transitions, 1041 flow [2023-08-30 19:19:10,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 1032 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:19:10,603 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 763 flow [2023-08-30 19:19:10,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=763, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2023-08-30 19:19:10,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2023-08-30 19:19:10,605 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 763 flow [2023-08-30 19:19:10,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:10,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:10,605 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 19:19:10,607 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 19:19:10,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1219073865, now seen corresponding path program 1 times [2023-08-30 19:19:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:10,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037210927] [2023-08-30 19:19:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:10,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-08-30 19:19:10,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037210927] [2023-08-30 19:19:10,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037210927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:10,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:19:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540582384] [2023-08-30 19:19:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:10,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:19:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:19:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:19:10,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 387 out of 983 [2023-08-30 19:19:10,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 763 flow. Second operand has 3 states, 3 states have (on average 397.3333333333333) internal successors, (1192), 3 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 19:19:10,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:10,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 387 of 983 [2023-08-30 19:19:10,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:11,093 INFO L130 PetriNetUnfolder]: 207/412 cut-off events. [2023-08-30 19:19:11,093 INFO L131 PetriNetUnfolder]: For 521/521 co-relation queries the response was YES. [2023-08-30 19:19:11,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 412 events. 207/412 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1188 event pairs, 67 based on Foata normal form. 14/366 useless extension candidates. Maximal degree in co-relation 1382. Up to 297 conditions per place. [2023-08-30 19:19:11,096 INFO L137 encePairwiseOnDemand]: 978/983 looper letters, 111 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-08-30 19:19:11,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 115 transitions, 1043 flow [2023-08-30 19:19:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:19:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:19:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1211 transitions. [2023-08-30 19:19:11,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41064767717870465 [2023-08-30 19:19:11,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1211 transitions. [2023-08-30 19:19:11,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1211 transitions. [2023-08-30 19:19:11,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:11,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1211 transitions. [2023-08-30 19:19:11,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.6666666666667) internal successors, (1211), 3 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:11,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:11,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:11,104 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 763 flow. Second operand 3 states and 1211 transitions. [2023-08-30 19:19:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 115 transitions, 1043 flow [2023-08-30 19:19:11,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 115 transitions, 1040 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:11,109 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 794 flow [2023-08-30 19:19:11,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=794, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2023-08-30 19:19:11,110 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-08-30 19:19:11,110 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 794 flow [2023-08-30 19:19:11,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.3333333333333) internal successors, (1192), 3 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 19:19:11,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:11,110 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:11,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 19:19:11,111 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 19:19:11,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:11,111 INFO L85 PathProgramCache]: Analyzing trace with hash 570594595, now seen corresponding path program 1 times [2023-08-30 19:19:11,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:11,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552178286] [2023-08-30 19:19:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2023-08-30 19:19:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552178286] [2023-08-30 19:19:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552178286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:19:18,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69394904] [2023-08-30 19:19:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:18,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:19:18,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:19:18,263 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 19:19:18,274 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 19:19:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 19:19:19,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:19:21,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:19:21,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 65 [2023-08-30 19:19:21,781 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:19:21,781 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 41 treesize of output 33 [2023-08-30 19:19:21,791 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:19:21,791 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 41 treesize of output 29 [2023-08-30 19:19:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-08-30 19:19:21,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:21:30,201 WARN L222 SmtUtils]: Spent 2.07m on a formula simplification. DAG size of input: 105 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:21:31,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:31,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 886 treesize of output 1231 Killed by 15