./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-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-array-int-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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --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 18:45:03,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:45:03,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:45:03,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:45:03,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:45:03,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:45:03,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:45:03,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:45:03,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:45:03,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:45:03,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:45:03,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:45:03,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:45:03,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:45:03,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:45:03,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:45:03,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:45:03,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:45:03,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:45:03,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:45:03,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:45:03,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:45:03,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:45:03,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:45:03,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:45:03,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:45:03,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:45:03,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:45:03,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:45:03,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:45:03,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:45:03,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:45:03,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:45:03,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:45:03,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:45:03,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:45:03,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:45:03,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:45:03,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:45:03,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:45:03,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:45:03,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:45:03,167 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:45:03,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:45:03,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:45:03,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:45:03,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:45:03,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:45:03,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:45:03,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:45:03,170 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:45:03,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:45:03,171 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:45:03,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:45:03,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:45:03,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:45:03,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:45:03,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:45:03,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:45:03,172 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:45:03,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:45:03,172 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:45:03,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:45:03,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:45:03,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:45:03,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:45:03,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:45:03,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:45:03,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:45:03,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:45:03,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:45:03,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:45:03,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:45:03,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:45:03,175 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:45:03,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:45:03,175 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:45:03,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:45:03,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:45:03,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:45:03,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:45:03,456 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:45:03,457 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:45:03,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-30 18:45:04,624 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:45:04,857 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:45:04,857 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-30 18:45:04,867 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01030642b/9c25e60b0aeb49c282e8f0c0c405a0de/FLAG510fc70ef [2023-08-30 18:45:04,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01030642b/9c25e60b0aeb49c282e8f0c0c405a0de [2023-08-30 18:45:04,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:45:04,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:45:04,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:45:04,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:45:04,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:45:04,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:45:04" (1/1) ... [2023-08-30 18:45:04,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@521826e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:04, skipping insertion in model container [2023-08-30 18:45:04,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:45:04" (1/1) ... [2023-08-30 18:45:04,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:45:04,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:45:05,065 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-array-int-symm.wvr.c[2482,2495] [2023-08-30 18:45:05,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:45:05,090 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:45:05,126 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-array-int-symm.wvr.c[2482,2495] [2023-08-30 18:45:05,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:45:05,154 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:45:05,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05 WrapperNode [2023-08-30 18:45:05,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:45:05,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:45:05,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:45:05,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:45:05,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,219 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 202 [2023-08-30 18:45:05,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:45:05,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:45:05,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:45:05,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:45:05,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,266 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:45:05,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:45:05,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:45:05,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:45:05,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (1/1) ... [2023-08-30 18:45:05,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:45:05,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:05,305 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 18:45:05,332 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 18:45:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:45:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:45:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:45:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:45:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:45:05,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:45:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:45:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:45:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:45:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:45:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:45:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:45:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:45:05,351 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 18:45:05,450 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:45:05,452 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:45:05,772 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:45:05,781 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:45:05,781 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 18:45:05,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:45:05 BoogieIcfgContainer [2023-08-30 18:45:05,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:45:05,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:45:05,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:45:05,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:45:05,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:45:04" (1/3) ... [2023-08-30 18:45:05,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b40bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:45:05, skipping insertion in model container [2023-08-30 18:45:05,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:05" (2/3) ... [2023-08-30 18:45:05,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b40bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:45:05, skipping insertion in model container [2023-08-30 18:45:05,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:45:05" (3/3) ... [2023-08-30 18:45:05,802 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-08-30 18:45:05,809 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:45:05,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:45:05,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:45:05,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:45:05,963 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:45:06,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-08-30 18:45:06,129 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-08-30 18:45:06,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:45:06,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-08-30 18:45:06,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-08-30 18:45:06,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-08-30 18:45:06,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:45:06,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-08-30 18:45:06,167 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-08-30 18:45:06,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-08-30 18:45:06,207 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-08-30 18:45:06,208 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:45:06,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-08-30 18:45:06,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 5192 [2023-08-30 18:45:12,196 INFO L134 LiptonReduction]: Checked pairs total: 5413 [2023-08-30 18:45:12,197 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-30 18:45:12,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:45:12,214 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;@4c29bb0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:45:12,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:45:12,219 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-08-30 18:45:12,219 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:45:12,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:12,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:12,221 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 18:45:12,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 40498280, now seen corresponding path program 1 times [2023-08-30 18:45:12,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:12,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039479170] [2023-08-30 18:45:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:12,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:12,998 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 18:45:12,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:13,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039479170] [2023-08-30 18:45:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039479170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:13,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:13,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:45:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093720062] [2023-08-30 18:45:13,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:13,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:45:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:13,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:45:13,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:45:13,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 483 [2023-08-30 18:45:13,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:13,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:13,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 483 [2023-08-30 18:45:13,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:13,514 INFO L130 PetriNetUnfolder]: 177/320 cut-off events. [2023-08-30 18:45:13,515 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 18:45:13,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 320 events. 177/320 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1171 event pairs, 20 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 320. Up to 134 conditions per place. [2023-08-30 18:45:13,523 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 60 selfloop transitions, 10 changer transitions 4/74 dead transitions. [2023-08-30 18:45:13,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 74 transitions, 335 flow [2023-08-30 18:45:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:45:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:45:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1621 transitions. [2023-08-30 18:45:13,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195134575569358 [2023-08-30 18:45:13,551 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1621 transitions. [2023-08-30 18:45:13,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1621 transitions. [2023-08-30 18:45:13,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:13,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1621 transitions. [2023-08-30 18:45:13,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.625) internal successors, (1621), 8 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:13,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:13,575 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:13,577 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 8 states and 1621 transitions. [2023-08-30 18:45:13,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 74 transitions, 335 flow [2023-08-30 18:45:13,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 74 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 18:45:13,582 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 113 flow [2023-08-30 18:45:13,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-08-30 18:45:13,587 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-30 18:45:13,588 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 113 flow [2023-08-30 18:45:13,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:13,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:13,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:13,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:45:13,589 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 18:45:13,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1445248948, now seen corresponding path program 2 times [2023-08-30 18:45:13,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817913239] [2023-08-30 18:45:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:13,931 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 18:45:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:13,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817913239] [2023-08-30 18:45:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817913239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:13,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:13,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:45:13,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624143451] [2023-08-30 18:45:13,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:45:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:45:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:45:14,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 483 [2023-08-30 18:45:14,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:14,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:14,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 483 [2023-08-30 18:45:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:14,298 INFO L130 PetriNetUnfolder]: 182/340 cut-off events. [2023-08-30 18:45:14,299 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 18:45:14,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 340 events. 182/340 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1316 event pairs, 22 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 527. Up to 134 conditions per place. [2023-08-30 18:45:14,301 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 54 selfloop transitions, 12 changer transitions 8/74 dead transitions. [2023-08-30 18:45:14,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 74 transitions, 365 flow [2023-08-30 18:45:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:45:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:45:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1618 transitions. [2023-08-30 18:45:14,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41873706004140787 [2023-08-30 18:45:14,306 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1618 transitions. [2023-08-30 18:45:14,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1618 transitions. [2023-08-30 18:45:14,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:14,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1618 transitions. [2023-08-30 18:45:14,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.25) internal successors, (1618), 8 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:14,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:14,327 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:14,327 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 113 flow. Second operand 8 states and 1618 transitions. [2023-08-30 18:45:14,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 74 transitions, 365 flow [2023-08-30 18:45:14,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 74 transitions, 363 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 18:45:14,332 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 161 flow [2023-08-30 18:45:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=161, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-30 18:45:14,333 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-08-30 18:45:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 161 flow [2023-08-30 18:45:14,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:14,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:14,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:14,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:45:14,335 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 18:45:14,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash 168744916, now seen corresponding path program 1 times [2023-08-30 18:45:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:14,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973519781] [2023-08-30 18:45:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:14,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:14,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:14,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973519781] [2023-08-30 18:45:14,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973519781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:14,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140162974] [2023-08-30 18:45:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:14,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:14,548 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 18:45:14,556 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 18:45:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:14,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 18:45:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:15,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:15,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 145 [2023-08-30 18:45:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:15,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:15,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:15,707 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 185 treesize of output 165 [2023-08-30 18:45:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:15,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140162974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:15,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:15,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 18:45:15,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338521145] [2023-08-30 18:45:15,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:15,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:45:15,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:45:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:45:16,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 18:45:16,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 161 flow. Second operand has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:16,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:16,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 18:45:16,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:17,590 INFO L130 PetriNetUnfolder]: 497/913 cut-off events. [2023-08-30 18:45:17,590 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-08-30 18:45:17,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2334 conditions, 913 events. 497/913 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4453 event pairs, 190 based on Foata normal form. 26/827 useless extension candidates. Maximal degree in co-relation 2101. Up to 333 conditions per place. [2023-08-30 18:45:17,595 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 115 selfloop transitions, 24 changer transitions 8/147 dead transitions. [2023-08-30 18:45:17,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 805 flow [2023-08-30 18:45:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:45:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:45:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3095 transitions. [2023-08-30 18:45:17,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40049171842650105 [2023-08-30 18:45:17,605 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3095 transitions. [2023-08-30 18:45:17,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3095 transitions. [2023-08-30 18:45:17,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:17,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3095 transitions. [2023-08-30 18:45:17,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 193.4375) internal successors, (3095), 16 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:17,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:17,624 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:17,624 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 161 flow. Second operand 16 states and 3095 transitions. [2023-08-30 18:45:17,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 805 flow [2023-08-30 18:45:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 147 transitions, 788 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 18:45:17,630 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 333 flow [2023-08-30 18:45:17,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=333, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-08-30 18:45:17,630 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2023-08-30 18:45:17,631 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 333 flow [2023-08-30 18:45:17,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:17,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:17,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:17,648 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 18:45:17,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:17,848 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 18:45:17,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash 924557380, now seen corresponding path program 2 times [2023-08-30 18:45:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:17,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973581523] [2023-08-30 18:45:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:18,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973581523] [2023-08-30 18:45:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973581523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625095377] [2023-08-30 18:45:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:45:18,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:18,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:18,118 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 18:45:18,132 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 18:45:18,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:45:18,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 18:45:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:18,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:18,409 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 126 treesize of output 107 [2023-08-30 18:45:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:18,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:45:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625095377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:18,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:45:18,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 18:45:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138558693] [2023-08-30 18:45:18,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:45:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:45:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:45:18,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 483 [2023-08-30 18:45:18,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:18,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 483 [2023-08-30 18:45:18,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:18,915 INFO L130 PetriNetUnfolder]: 559/1071 cut-off events. [2023-08-30 18:45:18,915 INFO L131 PetriNetUnfolder]: For 1615/1615 co-relation queries the response was YES. [2023-08-30 18:45:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 1071 events. 559/1071 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5746 event pairs, 88 based on Foata normal form. 38/975 useless extension candidates. Maximal degree in co-relation 2599. Up to 457 conditions per place. [2023-08-30 18:45:18,921 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 72 selfloop transitions, 30 changer transitions 6/108 dead transitions. [2023-08-30 18:45:18,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 108 transitions, 741 flow [2023-08-30 18:45:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:45:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:45:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1595 transitions. [2023-08-30 18:45:18,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41278467908902694 [2023-08-30 18:45:18,926 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1595 transitions. [2023-08-30 18:45:18,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1595 transitions. [2023-08-30 18:45:18,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:18,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1595 transitions. [2023-08-30 18:45:18,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.375) internal successors, (1595), 8 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,936 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,936 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 333 flow. Second operand 8 states and 1595 transitions. [2023-08-30 18:45:18,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 108 transitions, 741 flow [2023-08-30 18:45:18,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 698 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-08-30 18:45:18,944 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 497 flow [2023-08-30 18:45:18,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=497, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2023-08-30 18:45:18,945 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2023-08-30 18:45:18,945 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 497 flow [2023-08-30 18:45:18,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:18,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:18,955 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 18:45:19,151 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,SelfDestructingSolverStorable3 [2023-08-30 18:45:19,152 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 18:45:19,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:19,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1125552358, now seen corresponding path program 1 times [2023-08-30 18:45:19,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:19,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317190860] [2023-08-30 18:45:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:19,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:19,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317190860] [2023-08-30 18:45:19,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317190860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971725026] [2023-08-30 18:45:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:19,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:19,286 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 18:45:19,301 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 18:45:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:45:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:19,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971725026] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:19,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:45:19,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-30 18:45:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382772593] [2023-08-30 18:45:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:19,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:45:19,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:45:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:45:19,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-08-30 18:45:19,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 497 flow. Second operand has 7 states, 7 states have (on average 193.42857142857142) internal successors, (1354), 7 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:19,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:19,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-08-30 18:45:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:19,988 INFO L130 PetriNetUnfolder]: 599/1159 cut-off events. [2023-08-30 18:45:19,989 INFO L131 PetriNetUnfolder]: For 2711/2711 co-relation queries the response was YES. [2023-08-30 18:45:19,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3574 conditions, 1159 events. 599/1159 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6308 event pairs, 194 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 3090. Up to 234 conditions per place. [2023-08-30 18:45:19,996 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 102 selfloop transitions, 17 changer transitions 8/127 dead transitions. [2023-08-30 18:45:19,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 980 flow [2023-08-30 18:45:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:45:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:45:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2001 transitions. [2023-08-30 18:45:20,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-08-30 18:45:20,002 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2001 transitions. [2023-08-30 18:45:20,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2001 transitions. [2023-08-30 18:45:20,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:20,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2001 transitions. [2023-08-30 18:45:20,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 200.1) internal successors, (2001), 10 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,015 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,015 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 497 flow. Second operand 10 states and 2001 transitions. [2023-08-30 18:45:20,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 980 flow [2023-08-30 18:45:20,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 969 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 18:45:20,027 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 550 flow [2023-08-30 18:45:20,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=550, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-08-30 18:45:20,028 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-08-30 18:45:20,028 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 550 flow [2023-08-30 18:45:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.42857142857142) internal successors, (1354), 7 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:20,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:20,043 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 18:45:20,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:20,239 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 18:45:20,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1919531260, now seen corresponding path program 1 times [2023-08-30 18:45:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509969694] [2023-08-30 18:45:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:20,323 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 18:45:20,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509969694] [2023-08-30 18:45:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509969694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:20,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:20,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:45:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774681544] [2023-08-30 18:45:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:45:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:20,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:45:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:45:20,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-08-30 18:45:20,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:20,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-08-30 18:45:20,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:20,590 INFO L130 PetriNetUnfolder]: 463/919 cut-off events. [2023-08-30 18:45:20,590 INFO L131 PetriNetUnfolder]: For 2411/2411 co-relation queries the response was YES. [2023-08-30 18:45:20,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3081 conditions, 919 events. 463/919 cut-off events. For 2411/2411 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4733 event pairs, 314 based on Foata normal form. 24/942 useless extension candidates. Maximal degree in co-relation 2854. Up to 766 conditions per place. [2023-08-30 18:45:20,596 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 52 selfloop transitions, 2 changer transitions 26/80 dead transitions. [2023-08-30 18:45:20,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 685 flow [2023-08-30 18:45:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:45:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:45:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1034 transitions. [2023-08-30 18:45:20,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42815734989648035 [2023-08-30 18:45:20,599 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1034 transitions. [2023-08-30 18:45:20,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1034 transitions. [2023-08-30 18:45:20,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:20,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1034 transitions. [2023-08-30 18:45:20,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.8) internal successors, (1034), 5 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,606 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,606 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 550 flow. Second operand 5 states and 1034 transitions. [2023-08-30 18:45:20,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 685 flow [2023-08-30 18:45:20,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 635 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-30 18:45:20,620 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 343 flow [2023-08-30 18:45:20,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2023-08-30 18:45:20,621 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-08-30 18:45:20,621 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 343 flow [2023-08-30 18:45:20,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:20,622 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 18:45:20,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:45:20,622 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 18:45:20,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash -106514784, now seen corresponding path program 1 times [2023-08-30 18:45:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:20,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187825589] [2023-08-30 18:45:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:20,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:20,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:20,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187825589] [2023-08-30 18:45:20,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187825589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:20,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:20,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:45:20,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774730082] [2023-08-30 18:45:20,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:45:20,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:45:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:45:20,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-08-30 18:45:20,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:20,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-08-30 18:45:20,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:20,922 INFO L130 PetriNetUnfolder]: 266/526 cut-off events. [2023-08-30 18:45:20,923 INFO L131 PetriNetUnfolder]: For 1644/1644 co-relation queries the response was YES. [2023-08-30 18:45:20,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 526 events. 266/526 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2212 event pairs, 158 based on Foata normal form. 24/549 useless extension candidates. Maximal degree in co-relation 1793. Up to 375 conditions per place. [2023-08-30 18:45:20,926 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 32 selfloop transitions, 4 changer transitions 22/58 dead transitions. [2023-08-30 18:45:20,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 430 flow [2023-08-30 18:45:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:45:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:45:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1032 transitions. [2023-08-30 18:45:20,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42732919254658386 [2023-08-30 18:45:20,930 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1032 transitions. [2023-08-30 18:45:20,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1032 transitions. [2023-08-30 18:45:20,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:20,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1032 transitions. [2023-08-30 18:45:20,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.4) internal successors, (1032), 5 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,936 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 343 flow. Second operand 5 states and 1032 transitions. [2023-08-30 18:45:20,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 430 flow [2023-08-30 18:45:20,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 392 flow, removed 8 selfloop flow, removed 9 redundant places. [2023-08-30 18:45:20,940 INFO L231 Difference]: Finished difference. Result has 60 places, 36 transitions, 176 flow [2023-08-30 18:45:20,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=36} [2023-08-30 18:45:20,941 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-08-30 18:45:20,941 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 36 transitions, 176 flow [2023-08-30 18:45:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:20,943 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 18:45:20,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 18:45:20,943 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 18:45:20,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1869828197, now seen corresponding path program 1 times [2023-08-30 18:45:20,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:20,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635270028] [2023-08-30 18:45:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:20,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:21,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635270028] [2023-08-30 18:45:21,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635270028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:21,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43845470] [2023-08-30 18:45:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:21,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:21,437 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 18:45:21,440 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 18:45:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:21,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:45:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:21,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:45:21,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:21,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:21,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:26,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 18:45:26,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,497 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 598 treesize of output 546 [2023-08-30 18:45:26,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-08-30 18:45:26,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-08-30 18:45:26,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 18:45:26,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,827 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 1206 treesize of output 1090 [2023-08-30 18:45:26,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-08-30 18:45:26,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:26,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-08-30 18:45:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:27,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43845470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:27,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:27,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-08-30 18:45:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613905606] [2023-08-30 18:45:27,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:45:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:45:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=529, Unknown=33, NotChecked=0, Total=702 [2023-08-30 18:45:27,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-08-30 18:45:27,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 36 transitions, 176 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:27,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:27,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-08-30 18:45:27,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:28,765 INFO L130 PetriNetUnfolder]: 588/1042 cut-off events. [2023-08-30 18:45:28,766 INFO L131 PetriNetUnfolder]: For 3058/3058 co-relation queries the response was YES. [2023-08-30 18:45:28,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3664 conditions, 1042 events. 588/1042 cut-off events. For 3058/3058 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4968 event pairs, 76 based on Foata normal form. 32/1072 useless extension candidates. Maximal degree in co-relation 3626. Up to 313 conditions per place. [2023-08-30 18:45:28,773 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 77 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2023-08-30 18:45:28,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 100 transitions, 672 flow [2023-08-30 18:45:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:45:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:45:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1869 transitions. [2023-08-30 18:45:28,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2976588628762542 [2023-08-30 18:45:28,779 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1869 transitions. [2023-08-30 18:45:28,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1869 transitions. [2023-08-30 18:45:28,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:28,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1869 transitions. [2023-08-30 18:45:28,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.76923076923077) internal successors, (1869), 13 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,791 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,792 INFO L175 Difference]: Start difference. First operand has 60 places, 36 transitions, 176 flow. Second operand 13 states and 1869 transitions. [2023-08-30 18:45:28,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 100 transitions, 672 flow [2023-08-30 18:45:28,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 554 flow, removed 55 selfloop flow, removed 9 redundant places. [2023-08-30 18:45:28,805 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 281 flow [2023-08-30 18:45:28,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=281, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-30 18:45:28,807 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2023-08-30 18:45:28,808 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 281 flow [2023-08-30 18:45:28,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:28,809 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 18:45:28,817 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 18:45:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:29,015 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 18:45:29,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1008614899, now seen corresponding path program 2 times [2023-08-30 18:45:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:29,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907749368] [2023-08-30 18:45:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:29,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907749368] [2023-08-30 18:45:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907749368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39269050] [2023-08-30 18:45:29,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:45:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:29,589 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 18:45:29,597 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 18:45:29,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:45:29,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:45:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:29,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:30,114 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:45:30,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2023-08-30 18:45:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:30,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39269050] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:30,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:45:30,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2023-08-30 18:45:30,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362957263] [2023-08-30 18:45:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:30,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:45:30,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:45:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:45:30,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:45:30,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:30,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:30,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:45:30,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:31,051 INFO L130 PetriNetUnfolder]: 702/1236 cut-off events. [2023-08-30 18:45:31,051 INFO L131 PetriNetUnfolder]: For 2149/2149 co-relation queries the response was YES. [2023-08-30 18:45:31,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4479 conditions, 1236 events. 702/1236 cut-off events. For 2149/2149 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6064 event pairs, 198 based on Foata normal form. 4/1240 useless extension candidates. Maximal degree in co-relation 4439. Up to 652 conditions per place. [2023-08-30 18:45:31,058 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 72 selfloop transitions, 39 changer transitions 0/111 dead transitions. [2023-08-30 18:45:31,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 833 flow [2023-08-30 18:45:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:45:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:45:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2396 transitions. [2023-08-30 18:45:31,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38158942506768595 [2023-08-30 18:45:31,065 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2396 transitions. [2023-08-30 18:45:31,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2396 transitions. [2023-08-30 18:45:31,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:31,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2396 transitions. [2023-08-30 18:45:31,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.30769230769232) internal successors, (2396), 13 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:31,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:31,080 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:31,080 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 281 flow. Second operand 13 states and 2396 transitions. [2023-08-30 18:45:31,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 833 flow [2023-08-30 18:45:31,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 111 transitions, 799 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 18:45:31,087 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 556 flow [2023-08-30 18:45:31,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-30 18:45:31,089 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-08-30 18:45:31,089 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 556 flow [2023-08-30 18:45:31,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:31,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:31,090 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 18:45:31,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 18:45:31,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:31,295 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 18:45:31,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash -571449319, now seen corresponding path program 3 times [2023-08-30 18:45:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:31,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254877370] [2023-08-30 18:45:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254877370] [2023-08-30 18:45:31,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254877370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131762743] [2023-08-30 18:45:31,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:45:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:31,846 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 18:45:31,853 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 18:45:31,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:45:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:45:31,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:32,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:32,358 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:45:32,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-30 18:45:32,378 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:32,378 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 12 treesize of output 4 [2023-08-30 18:45:32,384 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:32,384 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 12 treesize of output 4 [2023-08-30 18:45:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131762743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:32,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-30 18:45:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567534985] [2023-08-30 18:45:32,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:45:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:45:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:45:33,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 483 [2023-08-30 18:45:33,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 556 flow. Second operand has 22 states, 22 states have (on average 177.72727272727272) internal successors, (3910), 22 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:33,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:33,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 483 [2023-08-30 18:45:33,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:34,454 INFO L130 PetriNetUnfolder]: 790/1412 cut-off events. [2023-08-30 18:45:34,455 INFO L131 PetriNetUnfolder]: For 5103/5103 co-relation queries the response was YES. [2023-08-30 18:45:34,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 1412 events. 790/1412 cut-off events. For 5103/5103 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7256 event pairs, 272 based on Foata normal form. 32/1444 useless extension candidates. Maximal degree in co-relation 6260. Up to 759 conditions per place. [2023-08-30 18:45:34,465 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 84 selfloop transitions, 33 changer transitions 0/117 dead transitions. [2023-08-30 18:45:34,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1096 flow [2023-08-30 18:45:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:45:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:45:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2004 transitions. [2023-08-30 18:45:34,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771880293619424 [2023-08-30 18:45:34,471 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2004 transitions. [2023-08-30 18:45:34,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2004 transitions. [2023-08-30 18:45:34,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:34,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2004 transitions. [2023-08-30 18:45:34,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 182.1818181818182) internal successors, (2004), 11 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:34,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:34,482 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:34,482 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 556 flow. Second operand 11 states and 2004 transitions. [2023-08-30 18:45:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1096 flow [2023-08-30 18:45:34,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 1006 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-30 18:45:34,500 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 688 flow [2023-08-30 18:45:34,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=688, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-08-30 18:45:34,500 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2023-08-30 18:45:34,501 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 688 flow [2023-08-30 18:45:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 177.72727272727272) internal successors, (3910), 22 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:34,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:34,502 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 18:45:34,511 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 18:45:34,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:34,707 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 18:45:34,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash -20464861, now seen corresponding path program 4 times [2023-08-30 18:45:34,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:34,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943260809] [2023-08-30 18:45:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:34,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943260809] [2023-08-30 18:45:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943260809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034904521] [2023-08-30 18:45:35,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:45:35,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:35,169 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 18:45:35,192 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 18:45:35,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:45:35,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 18:45:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:35,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:45:35,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:35,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:35,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:45:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034904521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:35,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 6] total 22 [2023-08-30 18:45:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381962530] [2023-08-30 18:45:35,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:45:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:45:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:45:37,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 483 [2023-08-30 18:45:37,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 688 flow. Second operand has 22 states, 22 states have (on average 171.04545454545453) internal successors, (3763), 22 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:37,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:37,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 483 [2023-08-30 18:45:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:38,515 INFO L130 PetriNetUnfolder]: 948/1710 cut-off events. [2023-08-30 18:45:38,515 INFO L131 PetriNetUnfolder]: For 7364/7364 co-relation queries the response was YES. [2023-08-30 18:45:38,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7957 conditions, 1710 events. 948/1710 cut-off events. For 7364/7364 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9299 event pairs, 230 based on Foata normal form. 32/1742 useless extension candidates. Maximal degree in co-relation 7906. Up to 894 conditions per place. [2023-08-30 18:45:38,526 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 86 selfloop transitions, 61 changer transitions 0/147 dead transitions. [2023-08-30 18:45:38,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 147 transitions, 1409 flow [2023-08-30 18:45:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:45:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:45:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2286 transitions. [2023-08-30 18:45:38,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36407071189679885 [2023-08-30 18:45:38,532 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2286 transitions. [2023-08-30 18:45:38,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2286 transitions. [2023-08-30 18:45:38,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:38,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2286 transitions. [2023-08-30 18:45:38,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.84615384615384) internal successors, (2286), 13 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:38,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:38,544 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:38,544 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 688 flow. Second operand 13 states and 2286 transitions. [2023-08-30 18:45:38,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 147 transitions, 1409 flow [2023-08-30 18:45:38,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 147 transitions, 1329 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-30 18:45:38,570 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 1106 flow [2023-08-30 18:45:38,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1106, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-08-30 18:45:38,571 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-08-30 18:45:38,571 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 1106 flow [2023-08-30 18:45:38,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 171.04545454545453) internal successors, (3763), 22 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:38,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:38,572 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 18:45:38,581 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 18:45:38,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:38,777 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 18:45:38,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1451051645, now seen corresponding path program 5 times [2023-08-30 18:45:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265101038] [2023-08-30 18:45:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:39,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:39,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265101038] [2023-08-30 18:45:39,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265101038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:39,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80570736] [2023-08-30 18:45:39,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:45:39,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:39,244 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 18:45:39,260 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 18:45:39,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:45:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 18:45:39,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:45:39,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:45:39,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80570736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:39,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:45:39,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-30 18:45:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779642289] [2023-08-30 18:45:39,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:39,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:45:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:45:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:45:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 483 [2023-08-30 18:45:39,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:39,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:39,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 483 [2023-08-30 18:45:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:39,846 INFO L130 PetriNetUnfolder]: 932/1654 cut-off events. [2023-08-30 18:45:39,846 INFO L131 PetriNetUnfolder]: For 9795/9795 co-relation queries the response was YES. [2023-08-30 18:45:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8750 conditions, 1654 events. 932/1654 cut-off events. For 9795/9795 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8865 event pairs, 310 based on Foata normal form. 4/1658 useless extension candidates. Maximal degree in co-relation 8693. Up to 1017 conditions per place. [2023-08-30 18:45:39,857 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 100 selfloop transitions, 30 changer transitions 0/130 dead transitions. [2023-08-30 18:45:39,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 1487 flow [2023-08-30 18:45:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:45:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:45:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-08-30 18:45:39,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-08-30 18:45:39,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-08-30 18:45:39,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-08-30 18:45:39,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:39,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-08-30 18:45:39,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:39,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:39,866 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:39,866 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 1106 flow. Second operand 6 states and 1197 transitions. [2023-08-30 18:45:39,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 1487 flow [2023-08-30 18:45:39,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1441 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-30 18:45:39,901 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 1130 flow [2023-08-30 18:45:39,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1130, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2023-08-30 18:45:39,901 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-08-30 18:45:39,901 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 1130 flow [2023-08-30 18:45:39,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:39,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:39,902 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 18:45:39,909 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 18:45:40,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 18:45:40,108 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 18:45:40,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash -900067187, now seen corresponding path program 6 times [2023-08-30 18:45:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062775098] [2023-08-30 18:45:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:40,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062775098] [2023-08-30 18:45:40,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062775098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029769237] [2023-08-30 18:45:40,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:45:40,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:40,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:40,561 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 18:45:40,564 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 18:45:40,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 18:45:40,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:45:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:40,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:41,003 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:41,003 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 20 treesize of output 4 [2023-08-30 18:45:41,044 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:45:41,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-08-30 18:45:41,068 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:41,068 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 20 treesize of output 4 [2023-08-30 18:45:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:41,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029769237] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:41,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:45:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-08-30 18:45:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224281712] [2023-08-30 18:45:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:45:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:45:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:45:41,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:45:41,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 1130 flow. Second operand has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:41,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:41,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:45:41,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:41,996 INFO L130 PetriNetUnfolder]: 916/1598 cut-off events. [2023-08-30 18:45:41,997 INFO L131 PetriNetUnfolder]: For 9260/9260 co-relation queries the response was YES. [2023-08-30 18:45:42,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 1598 events. 916/1598 cut-off events. For 9260/9260 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8387 event pairs, 216 based on Foata normal form. 4/1602 useless extension candidates. Maximal degree in co-relation 8530. Up to 812 conditions per place. [2023-08-30 18:45:42,007 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 80 selfloop transitions, 62 changer transitions 0/142 dead transitions. [2023-08-30 18:45:42,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1599 flow [2023-08-30 18:45:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:45:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:45:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2395 transitions. [2023-08-30 18:45:42,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814301640388597 [2023-08-30 18:45:42,011 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2395 transitions. [2023-08-30 18:45:42,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2395 transitions. [2023-08-30 18:45:42,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:42,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2395 transitions. [2023-08-30 18:45:42,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.23076923076923) internal successors, (2395), 13 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:42,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:42,019 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:42,019 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 1130 flow. Second operand 13 states and 2395 transitions. [2023-08-30 18:45:42,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1599 flow [2023-08-30 18:45:42,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1541 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 18:45:42,057 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 1198 flow [2023-08-30 18:45:42,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1198, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2023-08-30 18:45:42,057 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2023-08-30 18:45:42,058 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 1198 flow [2023-08-30 18:45:42,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:42,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:42,058 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 18:45:42,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:42,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 18:45:42,264 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 18:45:42,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash -525642385, now seen corresponding path program 7 times [2023-08-30 18:45:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522543837] [2023-08-30 18:45:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522543837] [2023-08-30 18:45:42,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522543837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:42,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313778036] [2023-08-30 18:45:42,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:45:42,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:42,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:42,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:42,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 18:45:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:45:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:42,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:45:42,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:42,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:43,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:43,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 18:45:43,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,476 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 598 treesize of output 546 [2023-08-30 18:45:43,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-08-30 18:45:43,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-08-30 18:45:43,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 18:45:43,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,752 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 1206 treesize of output 1090 [2023-08-30 18:45:43,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-08-30 18:45:43,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:43,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-08-30 18:45:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:43,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313778036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:43,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:43,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-08-30 18:45:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157676279] [2023-08-30 18:45:43,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:45:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:45:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=680, Unknown=14, NotChecked=0, Total=812 [2023-08-30 18:45:46,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-08-30 18:45:46,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 1198 flow. Second operand has 29 states, 29 states have (on average 138.51724137931035) internal successors, (4017), 29 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:46,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:46,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-08-30 18:45:46,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:47,012 INFO L130 PetriNetUnfolder]: 1202/2132 cut-off events. [2023-08-30 18:45:47,012 INFO L131 PetriNetUnfolder]: For 13561/13561 co-relation queries the response was YES. [2023-08-30 18:45:47,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11780 conditions, 2132 events. 1202/2132 cut-off events. For 13561/13561 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12156 event pairs, 228 based on Foata normal form. 4/2136 useless extension candidates. Maximal degree in co-relation 11720. Up to 927 conditions per place. [2023-08-30 18:45:47,021 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 79 selfloop transitions, 103 changer transitions 0/182 dead transitions. [2023-08-30 18:45:47,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 2240 flow [2023-08-30 18:45:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:45:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:45:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1988 transitions. [2023-08-30 18:45:47,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2939958592132505 [2023-08-30 18:45:47,024 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1988 transitions. [2023-08-30 18:45:47,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1988 transitions. [2023-08-30 18:45:47,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:47,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1988 transitions. [2023-08-30 18:45:47,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.0) internal successors, (1988), 14 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:47,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:47,029 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:47,029 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 1198 flow. Second operand 14 states and 1988 transitions. [2023-08-30 18:45:47,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 2240 flow [2023-08-30 18:45:47,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 182 transitions, 2115 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-30 18:45:47,064 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1863 flow [2023-08-30 18:45:47,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1863, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2023-08-30 18:45:47,065 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2023-08-30 18:45:47,065 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1863 flow [2023-08-30 18:45:47,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 138.51724137931035) internal successors, (4017), 29 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:47,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:47,066 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 18:45:47,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:47,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 18:45:47,271 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 18:45:47,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1427234071, now seen corresponding path program 8 times [2023-08-30 18:45:47,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:47,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415632315] [2023-08-30 18:45:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:47,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:47,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415632315] [2023-08-30 18:45:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415632315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261417804] [2023-08-30 18:45:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:45:47,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:47,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:47,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:47,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 18:45:47,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:45:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:45:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:47,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:48,104 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:48,104 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 20 treesize of output 4 [2023-08-30 18:45:48,154 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:45:48,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-08-30 18:45:48,175 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:48,175 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 20 treesize of output 4 [2023-08-30 18:45:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:48,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261417804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:48,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:48,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-30 18:45:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579493177] [2023-08-30 18:45:48,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:48,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:45:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:45:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:45:49,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 483 [2023-08-30 18:45:49,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1863 flow. Second operand has 22 states, 22 states have (on average 177.8181818181818) internal successors, (3912), 22 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:49,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:49,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 483 [2023-08-30 18:45:49,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:49,859 INFO L130 PetriNetUnfolder]: 1170/2100 cut-off events. [2023-08-30 18:45:49,859 INFO L131 PetriNetUnfolder]: For 17969/17969 co-relation queries the response was YES. [2023-08-30 18:45:49,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13038 conditions, 2100 events. 1170/2100 cut-off events. For 17969/17969 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11860 event pairs, 292 based on Foata normal form. 32/2132 useless extension candidates. Maximal degree in co-relation 12973. Up to 1203 conditions per place. [2023-08-30 18:45:49,869 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 128 selfloop transitions, 55 changer transitions 0/183 dead transitions. [2023-08-30 18:45:49,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 2513 flow [2023-08-30 18:45:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:45:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:45:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2003 transitions. [2023-08-30 18:45:49,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769998117824205 [2023-08-30 18:45:49,872 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2003 transitions. [2023-08-30 18:45:49,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2003 transitions. [2023-08-30 18:45:49,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:49,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2003 transitions. [2023-08-30 18:45:49,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 182.0909090909091) internal successors, (2003), 11 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:49,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:49,878 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:49,878 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1863 flow. Second operand 11 states and 2003 transitions. [2023-08-30 18:45:49,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 2513 flow [2023-08-30 18:45:49,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 183 transitions, 2392 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-08-30 18:45:49,961 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 2021 flow [2023-08-30 18:45:49,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2023-08-30 18:45:49,962 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 93 predicate places. [2023-08-30 18:45:49,962 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 2021 flow [2023-08-30 18:45:49,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 177.8181818181818) internal successors, (3912), 22 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:49,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:49,963 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 18:45:49,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:50,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 18:45:50,168 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 18:45:50,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -134892999, now seen corresponding path program 9 times [2023-08-30 18:45:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365950522] [2023-08-30 18:45:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365950522] [2023-08-30 18:45:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365950522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851142134] [2023-08-30 18:45:50,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:45:50,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:50,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:50,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:50,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 18:45:50,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:45:50,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 18:45:50,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:51,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:45:51,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:45:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:45:51,256 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:45:51,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-08-30 18:45:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:51,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:51,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2023-08-30 18:45:51,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,830 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 70 treesize of output 66 [2023-08-30 18:45:51,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-30 18:45:51,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2023-08-30 18:45:51,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,881 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 70 treesize of output 66 [2023-08-30 18:45:51,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-30 18:45:51,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:51,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 104 [2023-08-30 18:45:51,930 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:51,930 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 3750 treesize of output 3350 [2023-08-30 18:45:52,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:52,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 854 treesize of output 806 [2023-08-30 18:45:52,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:52,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 752 treesize of output 664 [2023-08-30 18:45:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851142134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:52,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:52,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-08-30 18:45:52,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913693475] [2023-08-30 18:45:52,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:45:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:45:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=793, Unknown=15, NotChecked=0, Total=930 [2023-08-30 18:45:53,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-08-30 18:45:53,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 2021 flow. Second operand has 31 states, 31 states have (on average 138.6451612903226) internal successors, (4298), 31 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:53,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:53,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-08-30 18:45:53,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:54,131 INFO L130 PetriNetUnfolder]: 1202/2156 cut-off events. [2023-08-30 18:45:54,131 INFO L131 PetriNetUnfolder]: For 20029/20029 co-relation queries the response was YES. [2023-08-30 18:45:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13749 conditions, 2156 events. 1202/2156 cut-off events. For 20029/20029 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12246 event pairs, 190 based on Foata normal form. 40/2196 useless extension candidates. Maximal degree in co-relation 13680. Up to 1132 conditions per place. [2023-08-30 18:45:54,142 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 135 selfloop transitions, 57 changer transitions 0/192 dead transitions. [2023-08-30 18:45:54,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 2825 flow [2023-08-30 18:45:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:45:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:45:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1570 transitions. [2023-08-30 18:45:54,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2955015998494259 [2023-08-30 18:45:54,145 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1570 transitions. [2023-08-30 18:45:54,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1570 transitions. [2023-08-30 18:45:54,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:54,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1570 transitions. [2023-08-30 18:45:54,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:54,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:54,151 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:54,151 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 2021 flow. Second operand 11 states and 1570 transitions. [2023-08-30 18:45:54,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 2825 flow [2023-08-30 18:45:54,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 2736 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-30 18:45:54,228 INFO L231 Difference]: Finished difference. Result has 124 places, 153 transitions, 2146 flow [2023-08-30 18:45:54,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2146, PETRI_PLACES=124, PETRI_TRANSITIONS=153} [2023-08-30 18:45:54,229 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 99 predicate places. [2023-08-30 18:45:54,230 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 153 transitions, 2146 flow [2023-08-30 18:45:54,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 138.6451612903226) internal successors, (4298), 31 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:54,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:54,231 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 18:45:54,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 18:45:54,436 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 18:45:54,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash -71803201, now seen corresponding path program 10 times [2023-08-30 18:45:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:54,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744727232] [2023-08-30 18:45:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:54,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:54,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:54,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744727232] [2023-08-30 18:45:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744727232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832896159] [2023-08-30 18:45:54,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:45:54,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:54,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:54,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:54,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 18:45:55,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:45:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:45:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 18:45:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:55,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:45:55,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:45:55,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:45:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:55,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:55,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:55,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 107 [2023-08-30 18:45:55,867 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:45:55,867 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 2126 treesize of output 1886 [2023-08-30 18:45:55,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:55,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 922 treesize of output 826 [2023-08-30 18:45:55,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:55,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 818 treesize of output 766 [2023-08-30 18:45:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832896159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:56,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 18:45:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084127429] [2023-08-30 18:45:56,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:45:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:45:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=665, Unknown=13, NotChecked=0, Total=812 [2023-08-30 18:45:58,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:00,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:02,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:02,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-08-30 18:46:02,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 153 transitions, 2146 flow. Second operand has 29 states, 29 states have (on average 138.6206896551724) internal successors, (4020), 29 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:02,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:46:02,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-08-30 18:46:02,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:46:05,204 INFO L130 PetriNetUnfolder]: 2136/3876 cut-off events. [2023-08-30 18:46:05,204 INFO L131 PetriNetUnfolder]: For 36806/36806 co-relation queries the response was YES. [2023-08-30 18:46:05,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23507 conditions, 3876 events. 2136/3876 cut-off events. For 36806/36806 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24984 event pairs, 432 based on Foata normal form. 24/3900 useless extension candidates. Maximal degree in co-relation 23436. Up to 1152 conditions per place. [2023-08-30 18:46:05,230 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 183 selfloop transitions, 122 changer transitions 0/305 dead transitions. [2023-08-30 18:46:05,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 4306 flow [2023-08-30 18:46:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 18:46:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 18:46:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2739 transitions. [2023-08-30 18:46:05,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2984635501797973 [2023-08-30 18:46:05,234 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2739 transitions. [2023-08-30 18:46:05,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2739 transitions. [2023-08-30 18:46:05,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:46:05,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2739 transitions. [2023-08-30 18:46:05,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.1578947368421) internal successors, (2739), 19 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:05,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:05,243 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:05,243 INFO L175 Difference]: Start difference. First operand has 124 places, 153 transitions, 2146 flow. Second operand 19 states and 2739 transitions. [2023-08-30 18:46:05,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 4306 flow [2023-08-30 18:46:05,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 305 transitions, 4137 flow, removed 47 selfloop flow, removed 8 redundant places. [2023-08-30 18:46:05,401 INFO L231 Difference]: Finished difference. Result has 141 places, 190 transitions, 2848 flow [2023-08-30 18:46:05,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2848, PETRI_PLACES=141, PETRI_TRANSITIONS=190} [2023-08-30 18:46:05,402 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 116 predicate places. [2023-08-30 18:46:05,402 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 190 transitions, 2848 flow [2023-08-30 18:46:05,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 138.6206896551724) internal successors, (4020), 29 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:05,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:46:05,403 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 18:46:05,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 18:46:05,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 18:46:05,605 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 18:46:05,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:46:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1227810281, now seen corresponding path program 11 times [2023-08-30 18:46:05,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:46:05,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485957695] [2023-08-30 18:46:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:46:05,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:46:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:46:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:46:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485957695] [2023-08-30 18:46:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485957695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:46:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114551526] [2023-08-30 18:46:06,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:46:06,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:06,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:46:06,130 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:46:06,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 18:46:06,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:46:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:46:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 18:46:06,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:46:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:46:06,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:46:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:46:06,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:46:06,754 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse5 (forall ((~a2~0.offset Int) (v_ArrVal_607 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_607) ~a2~0.base) (+ ~a2~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (and (forall ((~a2~0.offset Int) (v_ArrVal_607 (Array Int Int)) (~a2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_607))) (let ((.cse2 (select .cse4 ~a2~0.base))) (let ((.cse1 (select .cse2 ~a2~0.offset)) (.cse0 (select (select .cse4 c_~a1~0.base) c_~a1~0.offset))) (or (< (+ 2147483647 .cse0) .cse1) (= .cse0 .cse1) (not (= (select .cse2 (+ ~a2~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (< (+ .cse1 2147483648) .cse0)))))) (or (< 0 c_~n1~0) .cse5) (or (< 0 c_~n2~0) .cse5)))) is different from false [2023-08-30 18:46:06,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:06,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 365 treesize of output 429 [2023-08-30 18:46:06,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:06,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 244 [2023-08-30 18:46:06,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 209 [2023-08-30 18:46:06,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 203 [2023-08-30 18:46:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:46:09,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114551526] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:46:09,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:46:09,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2023-08-30 18:46:09,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237996094] [2023-08-30 18:46:09,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:46:09,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:46:09,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:46:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:46:09,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=515, Unknown=1, NotChecked=46, Total=650 [2023-08-30 18:46:09,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 483 [2023-08-30 18:46:09,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 190 transitions, 2848 flow. Second operand has 26 states, 26 states have (on average 143.03846153846155) internal successors, (3719), 26 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:09,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:46:09,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 483 [2023-08-30 18:46:09,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:46:10,925 INFO L130 PetriNetUnfolder]: 2032/3676 cut-off events. [2023-08-30 18:46:10,925 INFO L131 PetriNetUnfolder]: For 41979/41979 co-relation queries the response was YES. [2023-08-30 18:46:10,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 3676 events. 2032/3676 cut-off events. For 41979/41979 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23463 event pairs, 694 based on Foata normal form. 76/3752 useless extension candidates. Maximal degree in co-relation 23791. Up to 2697 conditions per place. [2023-08-30 18:46:10,949 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 162 selfloop transitions, 59 changer transitions 0/221 dead transitions. [2023-08-30 18:46:10,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 221 transitions, 3556 flow [2023-08-30 18:46:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:46:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:46:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1614 transitions. [2023-08-30 18:46:10,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3037831733483907 [2023-08-30 18:46:10,952 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1614 transitions. [2023-08-30 18:46:10,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1614 transitions. [2023-08-30 18:46:10,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:46:10,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1614 transitions. [2023-08-30 18:46:10,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.72727272727272) internal successors, (1614), 11 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:10,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:10,958 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:10,958 INFO L175 Difference]: Start difference. First operand has 141 places, 190 transitions, 2848 flow. Second operand 11 states and 1614 transitions. [2023-08-30 18:46:10,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 221 transitions, 3556 flow [2023-08-30 18:46:11,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 221 transitions, 3314 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-08-30 18:46:11,111 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2678 flow [2023-08-30 18:46:11,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2678, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2023-08-30 18:46:11,111 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2023-08-30 18:46:11,111 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2678 flow [2023-08-30 18:46:11,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 143.03846153846155) internal successors, (3719), 26 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:11,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:46:11,112 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 18:46:11,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 18:46:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:11,313 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:46:11,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:46:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 806001645, now seen corresponding path program 12 times [2023-08-30 18:46:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:46:11,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386629840] [2023-08-30 18:46:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:46:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:46:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:46:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:11,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:46:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386629840] [2023-08-30 18:46:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386629840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:46:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755313572] [2023-08-30 18:46:11,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:46:11,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:11,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:46:11,706 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:46:11,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 18:46:11,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 18:46:11,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:46:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:46:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:46:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:46:12,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:46:12,593 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:46:12,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 223 [2023-08-30 18:46:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:46:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755313572] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:46:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:46:12,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 26 [2023-08-30 18:46:12,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602532352] [2023-08-30 18:46:12,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:46:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:46:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:46:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:46:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:46:13,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-08-30 18:46:13,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2678 flow. Second operand has 9 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:13,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:46:13,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-08-30 18:46:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:46:14,310 INFO L130 PetriNetUnfolder]: 2130/3900 cut-off events. [2023-08-30 18:46:14,310 INFO L131 PetriNetUnfolder]: For 39081/39081 co-relation queries the response was YES. [2023-08-30 18:46:14,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 3900 events. 2130/3900 cut-off events. For 39081/39081 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25434 event pairs, 446 based on Foata normal form. 6/3906 useless extension candidates. Maximal degree in co-relation 24662. Up to 2077 conditions per place. [2023-08-30 18:46:14,333 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 123 selfloop transitions, 127 changer transitions 4/254 dead transitions. [2023-08-30 18:46:14,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 254 transitions, 3891 flow [2023-08-30 18:46:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:46:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:46:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2133 transitions. [2023-08-30 18:46:14,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36801242236024845 [2023-08-30 18:46:14,338 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2133 transitions. [2023-08-30 18:46:14,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2133 transitions. [2023-08-30 18:46:14,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:46:14,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2133 transitions. [2023-08-30 18:46:14,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.75) internal successors, (2133), 12 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:14,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:14,344 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:14,345 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2678 flow. Second operand 12 states and 2133 transitions. [2023-08-30 18:46:14,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 254 transitions, 3891 flow [2023-08-30 18:46:14,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 254 transitions, 3741 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-30 18:46:14,529 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 3596 flow [2023-08-30 18:46:14,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3596, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2023-08-30 18:46:14,530 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2023-08-30 18:46:14,530 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 3596 flow [2023-08-30 18:46:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:46:14,530 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 18:46:14,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 18:46:14,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:14,731 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:46:14,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:46:14,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1568119743, now seen corresponding path program 13 times [2023-08-30 18:46:14,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:46:14,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119824857] [2023-08-30 18:46:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:46:14,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:46:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:46:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:46:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119824857] [2023-08-30 18:46:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119824857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:46:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555938010] [2023-08-30 18:46:15,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:46:15,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:15,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:46:15,133 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:46:15,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 18:46:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:46:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:46:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:46:15,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:46:15,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:46:15,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:46:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:15,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:46:15,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:15,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 18:46:16,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,007 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 294 treesize of output 274 [2023-08-30 18:46:16,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-08-30 18:46:16,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-08-30 18:46:16,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 18:46:16,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,170 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 1206 treesize of output 1090 [2023-08-30 18:46:16,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-08-30 18:46:16,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:16,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-08-30 18:46:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:16,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555938010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:46:16,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:46:16,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-08-30 18:46:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670047666] [2023-08-30 18:46:16,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:46:16,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:46:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:46:16,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:46:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=562, Unknown=12, NotChecked=0, Total=702 [2023-08-30 18:46:18,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-08-30 18:46:18,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 3596 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:18,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:46:18,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-08-30 18:46:18,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:46:19,759 INFO L130 PetriNetUnfolder]: 2092/3794 cut-off events. [2023-08-30 18:46:19,759 INFO L131 PetriNetUnfolder]: For 45543/45543 co-relation queries the response was YES. [2023-08-30 18:46:19,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26519 conditions, 3794 events. 2092/3794 cut-off events. For 45543/45543 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24530 event pairs, 410 based on Foata normal form. 8/3802 useless extension candidates. Maximal degree in co-relation 26437. Up to 1889 conditions per place. [2023-08-30 18:46:19,782 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 97 selfloop transitions, 156 changer transitions 1/254 dead transitions. [2023-08-30 18:46:19,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 4231 flow [2023-08-30 18:46:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:46:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:46:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2132 transitions. [2023-08-30 18:46:19,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29427191166321603 [2023-08-30 18:46:19,785 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2132 transitions. [2023-08-30 18:46:19,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2132 transitions. [2023-08-30 18:46:19,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:46:19,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2132 transitions. [2023-08-30 18:46:19,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 142.13333333333333) internal successors, (2132), 15 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:19,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:19,792 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:19,792 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 3596 flow. Second operand 15 states and 2132 transitions. [2023-08-30 18:46:19,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 4231 flow [2023-08-30 18:46:19,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 254 transitions, 4122 flow, removed 53 selfloop flow, removed 2 redundant places. [2023-08-30 18:46:19,963 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 3770 flow [2023-08-30 18:46:19,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3770, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2023-08-30 18:46:19,964 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 142 predicate places. [2023-08-30 18:46:19,964 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 3770 flow [2023-08-30 18:46:19,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:46:19,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:46:19,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:46:19,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 18:46:20,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:20,166 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:46:20,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:46:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1588118134, now seen corresponding path program 1 times [2023-08-30 18:46:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:46:20,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059810364] [2023-08-30 18:46:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:46:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:46:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:46:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:46:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059810364] [2023-08-30 18:46:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059810364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:46:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170991471] [2023-08-30 18:46:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:46:20,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:46:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:46:20,917 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:46:20,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 18:46:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:46:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:46:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:46:21,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:46:21,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:46:21,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:46:21,487 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:46:21,488 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 39 treesize of output 19 [2023-08-30 18:46:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:21,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:46:26,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:26,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:46:26,505 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:46:26,505 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 278 treesize of output 253 [2023-08-30 18:46:26,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:26,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-08-30 18:46:26,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:26,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-08-30 18:46:26,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:26,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:46:26,888 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:46:26,889 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 566 treesize of output 509 [2023-08-30 18:46:26,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:26,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-08-30 18:46:26,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:26,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-08-30 18:46:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:46:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170991471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:46:27,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:46:27,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2023-08-30 18:46:27,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600947698] [2023-08-30 18:46:27,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:46:27,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 18:46:27,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:46:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 18:46:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1078, Unknown=13, NotChecked=0, Total=1332 [2023-08-30 18:46:29,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:31,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:33,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:35,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:37,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:39,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:41,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:43,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:45,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:46,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:48,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:50,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:52,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:54,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:56,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:46:58,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:00,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:02,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:03,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:05,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:07,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:09,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:11,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:13,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:15,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:17,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:19,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:21,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:23,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:25,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:27,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:29,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:31,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:33,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:35,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:37,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:40,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:42,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:44,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:46,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:48,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:50,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:52,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:54,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:56,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:47:58,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:00,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:02,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:04,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:06,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:08,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:10,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:12,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:14,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:16,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:18,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:18,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-08-30 18:48:18,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 3770 flow. Second operand has 37 states, 37 states have (on average 129.56756756756758) internal successors, (4794), 37 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:18,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:18,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-08-30 18:48:18,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:20,800 INFO L130 PetriNetUnfolder]: 2252/4152 cut-off events. [2023-08-30 18:48:20,800 INFO L131 PetriNetUnfolder]: For 53684/53684 co-relation queries the response was YES. [2023-08-30 18:48:20,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29631 conditions, 4152 events. 2252/4152 cut-off events. For 53684/53684 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 27813 event pairs, 388 based on Foata normal form. 10/4162 useless extension candidates. Maximal degree in co-relation 29544. Up to 1461 conditions per place. [2023-08-30 18:48:20,828 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 279 selfloop transitions, 125 changer transitions 11/415 dead transitions. [2023-08-30 18:48:20,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 415 transitions, 6489 flow [2023-08-30 18:48:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:48:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:48:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3247 transitions. [2023-08-30 18:48:20,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2801069703243616 [2023-08-30 18:48:20,831 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3247 transitions. [2023-08-30 18:48:20,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3247 transitions. [2023-08-30 18:48:20,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:20,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3247 transitions. [2023-08-30 18:48:20,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 135.29166666666666) internal successors, (3247), 24 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:20,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:20,842 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:20,842 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 3770 flow. Second operand 24 states and 3247 transitions. [2023-08-30 18:48:20,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 415 transitions, 6489 flow [2023-08-30 18:48:21,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 415 transitions, 6381 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-30 18:48:21,039 INFO L231 Difference]: Finished difference. Result has 189 places, 271 transitions, 4561 flow [2023-08-30 18:48:21,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4561, PETRI_PLACES=189, PETRI_TRANSITIONS=271} [2023-08-30 18:48:21,039 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2023-08-30 18:48:21,040 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 271 transitions, 4561 flow [2023-08-30 18:48:21,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 129.56756756756758) internal successors, (4794), 37 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:21,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:21,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:21,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 18:48:21,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:21,246 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:48:21,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1970275389, now seen corresponding path program 1 times [2023-08-30 18:48:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:21,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409450926] [2023-08-30 18:48:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:48:21,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409450926] [2023-08-30 18:48:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409450926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182710716] [2023-08-30 18:48:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:21,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:21,565 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:48:21,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 18:48:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:21,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 18:48:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:48:22,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:22,026 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 130 treesize of output 111 [2023-08-30 18:48:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:48:22,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:48:22,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:22,328 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 185 treesize of output 165 [2023-08-30 18:48:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:48:22,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182710716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:48:22,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:48:22,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 18:48:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641886027] [2023-08-30 18:48:22,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:48:22,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:48:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:48:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:48:23,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 18:48:23,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 271 transitions, 4561 flow. Second operand has 27 states, 27 states have (on average 187.22222222222223) internal successors, (5055), 27 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:23,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:23,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 18:48:23,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:25,843 INFO L130 PetriNetUnfolder]: 5541/10406 cut-off events. [2023-08-30 18:48:25,844 INFO L131 PetriNetUnfolder]: For 147387/147387 co-relation queries the response was YES. [2023-08-30 18:48:25,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75845 conditions, 10406 events. 5541/10406 cut-off events. For 147387/147387 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 84580 event pairs, 815 based on Foata normal form. 314/10720 useless extension candidates. Maximal degree in co-relation 75407. Up to 4092 conditions per place. [2023-08-30 18:48:25,912 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 696 selfloop transitions, 229 changer transitions 21/946 dead transitions. [2023-08-30 18:48:25,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 946 transitions, 17285 flow [2023-08-30 18:48:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 18:48:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 18:48:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3669 transitions. [2023-08-30 18:48:25,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998038574697614 [2023-08-30 18:48:25,916 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3669 transitions. [2023-08-30 18:48:25,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3669 transitions. [2023-08-30 18:48:25,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:25,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3669 transitions. [2023-08-30 18:48:25,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 193.10526315789474) internal successors, (3669), 19 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:25,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:25,924 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:25,924 INFO L175 Difference]: Start difference. First operand has 189 places, 271 transitions, 4561 flow. Second operand 19 states and 3669 transitions. [2023-08-30 18:48:25,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 946 transitions, 17285 flow [2023-08-30 18:48:26,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 946 transitions, 16866 flow, removed 88 selfloop flow, removed 9 redundant places. [2023-08-30 18:48:26,841 INFO L231 Difference]: Finished difference. Result has 204 places, 492 transitions, 9058 flow [2023-08-30 18:48:26,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9058, PETRI_PLACES=204, PETRI_TRANSITIONS=492} [2023-08-30 18:48:26,842 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 179 predicate places. [2023-08-30 18:48:26,842 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 492 transitions, 9058 flow [2023-08-30 18:48:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 187.22222222222223) internal successors, (5055), 27 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:26,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:26,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:26,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 18:48:27,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:27,043 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:48:27,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1997958036, now seen corresponding path program 2 times [2023-08-30 18:48:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:27,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245688156] [2023-08-30 18:48:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:48:27,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:27,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245688156] [2023-08-30 18:48:27,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245688156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279446128] [2023-08-30 18:48:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:48:27,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:27,615 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:48:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 18:48:27,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:48:27,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:48:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:48:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:48:28,116 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:48:28,116 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 39 treesize of output 19 [2023-08-30 18:48:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:48:28,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:48:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279446128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:48:28,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:48:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:48:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009093907] [2023-08-30 18:48:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:48:28,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:48:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:48:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:48:28,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:48:28,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 492 transitions, 9058 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:28,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:28,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:48:28,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:31,004 INFO L130 PetriNetUnfolder]: 5556/10466 cut-off events. [2023-08-30 18:48:31,004 INFO L131 PetriNetUnfolder]: For 171064/171064 co-relation queries the response was YES. [2023-08-30 18:48:31,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80752 conditions, 10466 events. 5556/10466 cut-off events. For 171064/171064 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 85792 event pairs, 2130 based on Foata normal form. 15/10481 useless extension candidates. Maximal degree in co-relation 78879. Up to 7629 conditions per place. [2023-08-30 18:48:31,075 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 454 selfloop transitions, 89 changer transitions 14/557 dead transitions. [2023-08-30 18:48:31,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 557 transitions, 11037 flow [2023-08-30 18:48:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:48:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:48:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2038 transitions. [2023-08-30 18:48:31,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38358742706568794 [2023-08-30 18:48:31,077 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2038 transitions. [2023-08-30 18:48:31,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2038 transitions. [2023-08-30 18:48:31,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:31,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2038 transitions. [2023-08-30 18:48:31,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.27272727272728) internal successors, (2038), 11 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:31,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:31,082 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:31,082 INFO L175 Difference]: Start difference. First operand has 204 places, 492 transitions, 9058 flow. Second operand 11 states and 2038 transitions. [2023-08-30 18:48:31,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 557 transitions, 11037 flow [2023-08-30 18:48:32,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 557 transitions, 10887 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 18:48:32,590 INFO L231 Difference]: Finished difference. Result has 213 places, 500 transitions, 9337 flow [2023-08-30 18:48:32,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=8928, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9337, PETRI_PLACES=213, PETRI_TRANSITIONS=500} [2023-08-30 18:48:32,590 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-08-30 18:48:32,590 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 500 transitions, 9337 flow [2023-08-30 18:48:32,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:32,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:32,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:32,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 18:48:32,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:32,796 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:48:32,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash 773329696, now seen corresponding path program 3 times [2023-08-30 18:48:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:32,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706765476] [2023-08-30 18:48:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:48:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:33,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706765476] [2023-08-30 18:48:33,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706765476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:33,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621256436] [2023-08-30 18:48:33,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:48:33,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:33,352 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:48:33,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 18:48:33,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:48:33,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:48:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:48:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:48:33,798 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:48:33,798 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 39 treesize of output 19 [2023-08-30 18:48:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:48:33,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:48:33,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621256436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:48:33,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:48:33,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:48:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360972559] [2023-08-30 18:48:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:48:33,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:48:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:48:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:48:34,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:48:34,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 500 transitions, 9337 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:34,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:34,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:48:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:36,578 INFO L130 PetriNetUnfolder]: 5556/10476 cut-off events. [2023-08-30 18:48:36,578 INFO L131 PetriNetUnfolder]: For 177652/177652 co-relation queries the response was YES. [2023-08-30 18:48:36,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81812 conditions, 10476 events. 5556/10476 cut-off events. For 177652/177652 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 85763 event pairs, 2134 based on Foata normal form. 25/10501 useless extension candidates. Maximal degree in co-relation 81181. Up to 7629 conditions per place. [2023-08-30 18:48:36,657 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 452 selfloop transitions, 81 changer transitions 19/552 dead transitions. [2023-08-30 18:48:36,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 552 transitions, 11057 flow [2023-08-30 18:48:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:48:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:48:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2039 transitions. [2023-08-30 18:48:36,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38377564464520986 [2023-08-30 18:48:36,659 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2039 transitions. [2023-08-30 18:48:36,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2039 transitions. [2023-08-30 18:48:36,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:36,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2039 transitions. [2023-08-30 18:48:36,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.36363636363637) internal successors, (2039), 11 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:36,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:36,664 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:36,664 INFO L175 Difference]: Start difference. First operand has 213 places, 500 transitions, 9337 flow. Second operand 11 states and 2039 transitions. [2023-08-30 18:48:36,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 552 transitions, 11057 flow [2023-08-30 18:48:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 552 transitions, 10869 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-30 18:48:38,259 INFO L231 Difference]: Finished difference. Result has 216 places, 492 transitions, 9185 flow [2023-08-30 18:48:38,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9153, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9185, PETRI_PLACES=216, PETRI_TRANSITIONS=492} [2023-08-30 18:48:38,260 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 191 predicate places. [2023-08-30 18:48:38,260 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 492 transitions, 9185 flow [2023-08-30 18:48:38,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:38,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:38,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:38,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 18:48:38,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 18:48:38,461 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:48:38,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:38,461 INFO L85 PathProgramCache]: Analyzing trace with hash 176099406, now seen corresponding path program 4 times [2023-08-30 18:48:38,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:38,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119342528] [2023-08-30 18:48:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:38,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:48:39,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:39,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119342528] [2023-08-30 18:48:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119342528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:39,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217043797] [2023-08-30 18:48:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:48:39,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:39,013 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:48:39,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 18:48:39,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:48:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:48:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 18:48:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:48:39,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:48:39,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:48:39,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:48:39,389 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:48:39,389 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 52 treesize of output 24 [2023-08-30 18:48:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:48:39,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:48:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:48:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217043797] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:40,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:48:40,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 11] total 23 [2023-08-30 18:48:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755096286] [2023-08-30 18:48:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:48:40,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:48:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:48:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:48:40,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2023-08-30 18:48:40,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 492 transitions, 9185 flow. Second operand has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:40,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:40,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2023-08-30 18:48:40,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:43,975 INFO L130 PetriNetUnfolder]: 6111/11546 cut-off events. [2023-08-30 18:48:43,975 INFO L131 PetriNetUnfolder]: For 203729/203729 co-relation queries the response was YES. [2023-08-30 18:48:44,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92624 conditions, 11546 events. 6111/11546 cut-off events. For 203729/203729 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 96230 event pairs, 2380 based on Foata normal form. 5/11551 useless extension candidates. Maximal degree in co-relation 91902. Up to 9866 conditions per place. [2023-08-30 18:48:44,058 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 566 selfloop transitions, 54 changer transitions 8/628 dead transitions. [2023-08-30 18:48:44,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 628 transitions, 13070 flow [2023-08-30 18:48:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:48:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:48:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1538 transitions. [2023-08-30 18:48:44,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39803312629399584 [2023-08-30 18:48:44,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1538 transitions. [2023-08-30 18:48:44,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1538 transitions. [2023-08-30 18:48:44,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:44,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1538 transitions. [2023-08-30 18:48:44,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.25) internal successors, (1538), 8 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:44,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:44,064 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:44,064 INFO L175 Difference]: Start difference. First operand has 216 places, 492 transitions, 9185 flow. Second operand 8 states and 1538 transitions. [2023-08-30 18:48:44,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 628 transitions, 13070 flow [2023-08-30 18:48:45,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 628 transitions, 12734 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-08-30 18:48:45,887 INFO L231 Difference]: Finished difference. Result has 215 places, 528 transitions, 10116 flow [2023-08-30 18:48:45,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9005, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10116, PETRI_PLACES=215, PETRI_TRANSITIONS=528} [2023-08-30 18:48:45,887 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 190 predicate places. [2023-08-30 18:48:45,887 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 528 transitions, 10116 flow [2023-08-30 18:48:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:45,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:45,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 18:48:46,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 18:48:46,089 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:48:46,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash 706975026, now seen corresponding path program 5 times [2023-08-30 18:48:46,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:46,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360378018] [2023-08-30 18:48:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:48:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:46,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360378018] [2023-08-30 18:48:46,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360378018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:46,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155136989] [2023-08-30 18:48:46,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:48:46,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:46,693 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:48:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 18:48:46,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:48:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:48:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:48:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:48:46,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:48:46,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:48:46,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:48:47,284 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:48:47,284 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 39 treesize of output 19 [2023-08-30 18:48:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:48:47,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:48:50,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:50,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:48:50,201 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:48:50,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-08-30 18:48:50,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:50,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-08-30 18:48:50,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:50,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-08-30 18:48:50,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:50,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:48:50,492 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:48:50,492 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 566 treesize of output 509 [2023-08-30 18:48:50,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:50,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-08-30 18:48:50,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:50,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-08-30 18:48:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:48:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155136989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:48:50,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:48:50,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2023-08-30 18:48:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118354538] [2023-08-30 18:48:50,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:48:50,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 18:48:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:50,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 18:48:50,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=969, Unknown=13, NotChecked=0, Total=1190 [2023-08-30 18:48:52,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:55,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:57,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:48:59,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:01,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:03,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:05,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:07,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:09,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:11,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:13,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:15,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:17,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:19,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:21,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:23,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:25,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:27,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:29,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:31,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:33,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:35,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:37,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:39,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:41,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:43,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:45,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:47,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:49,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:52,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:54,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:56,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:49:58,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:00,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:02,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:04,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:06,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:08,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:10,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:12,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:12,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-08-30 18:50:12,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 528 transitions, 10116 flow. Second operand has 35 states, 35 states have (on average 129.5142857142857) internal successors, (4533), 35 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:12,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:50:12,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-08-30 18:50:12,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:50:15,928 INFO L130 PetriNetUnfolder]: 6007/11563 cut-off events. [2023-08-30 18:50:15,928 INFO L131 PetriNetUnfolder]: For 199959/199959 co-relation queries the response was YES. [2023-08-30 18:50:15,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90881 conditions, 11563 events. 6007/11563 cut-off events. For 199959/199959 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 98595 event pairs, 1584 based on Foata normal form. 130/11693 useless extension candidates. Maximal degree in co-relation 90156. Up to 5748 conditions per place. [2023-08-30 18:50:16,145 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 393 selfloop transitions, 240 changer transitions 32/665 dead transitions. [2023-08-30 18:50:16,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 665 transitions, 13009 flow [2023-08-30 18:50:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:50:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:50:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2963 transitions. [2023-08-30 18:50:16,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27884434406173536 [2023-08-30 18:50:16,148 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2963 transitions. [2023-08-30 18:50:16,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2963 transitions. [2023-08-30 18:50:16,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:50:16,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2963 transitions. [2023-08-30 18:50:16,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 134.6818181818182) internal successors, (2963), 22 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:16,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 483.0) internal successors, (11109), 23 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:16,157 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 483.0) internal successors, (11109), 23 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:16,157 INFO L175 Difference]: Start difference. First operand has 215 places, 528 transitions, 10116 flow. Second operand 22 states and 2963 transitions. [2023-08-30 18:50:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 665 transitions, 13009 flow [2023-08-30 18:50:17,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 665 transitions, 12948 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-08-30 18:50:17,967 INFO L231 Difference]: Finished difference. Result has 240 places, 557 transitions, 11199 flow [2023-08-30 18:50:17,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9902, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11199, PETRI_PLACES=240, PETRI_TRANSITIONS=557} [2023-08-30 18:50:17,967 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2023-08-30 18:50:17,967 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 557 transitions, 11199 flow [2023-08-30 18:50:17,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 129.5142857142857) internal successors, (4533), 35 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:17,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:50:17,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:50:17,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 18:50:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 18:50:18,169 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:50:18,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:50:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1885109360, now seen corresponding path program 6 times [2023-08-30 18:50:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:50:18,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861220479] [2023-08-30 18:50:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:50:18,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:50:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:50:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:50:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:50:18,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861220479] [2023-08-30 18:50:18,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861220479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:50:18,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947823389] [2023-08-30 18:50:18,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:50:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:50:18,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:50:18,704 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:50:18,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 18:50:18,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 18:50:18,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:50:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:50:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:50:19,113 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:50:19,113 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 39 treesize of output 19 [2023-08-30 18:50:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:50:19,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:50:19,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947823389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:50:19,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:50:19,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:50:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467002863] [2023-08-30 18:50:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:50:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:50:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:50:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:50:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:50:19,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-08-30 18:50:19,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 557 transitions, 11199 flow. Second operand has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:19,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:50:19,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-08-30 18:50:19,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:50:22,352 INFO L130 PetriNetUnfolder]: 5962/11478 cut-off events. [2023-08-30 18:50:22,353 INFO L131 PetriNetUnfolder]: For 214391/214391 co-relation queries the response was YES. [2023-08-30 18:50:22,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93355 conditions, 11478 events. 5962/11478 cut-off events. For 214391/214391 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 97922 event pairs, 2155 based on Foata normal form. 10/11488 useless extension candidates. Maximal degree in co-relation 92788. Up to 7709 conditions per place. [2023-08-30 18:50:22,440 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 522 selfloop transitions, 68 changer transitions 28/618 dead transitions. [2023-08-30 18:50:22,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 618 transitions, 13102 flow [2023-08-30 18:50:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:50:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:50:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2386 transitions. [2023-08-30 18:50:22,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799968147794235 [2023-08-30 18:50:22,442 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2386 transitions. [2023-08-30 18:50:22,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2386 transitions. [2023-08-30 18:50:22,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:50:22,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2386 transitions. [2023-08-30 18:50:22,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.53846153846155) internal successors, (2386), 13 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:22,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:22,449 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:22,449 INFO L175 Difference]: Start difference. First operand has 240 places, 557 transitions, 11199 flow. Second operand 13 states and 2386 transitions. [2023-08-30 18:50:22,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 618 transitions, 13102 flow [2023-08-30 18:50:24,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 618 transitions, 12536 flow, removed 114 selfloop flow, removed 14 redundant places. [2023-08-30 18:50:24,327 INFO L231 Difference]: Finished difference. Result has 239 places, 547 transitions, 10575 flow [2023-08-30 18:50:24,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10687, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10575, PETRI_PLACES=239, PETRI_TRANSITIONS=547} [2023-08-30 18:50:24,328 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 214 predicate places. [2023-08-30 18:50:24,328 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 547 transitions, 10575 flow [2023-08-30 18:50:24,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:24,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:50:24,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:50:24,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 18:50:24,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:50:24,639 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:50:24,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:50:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1136977276, now seen corresponding path program 7 times [2023-08-30 18:50:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:50:24,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595752158] [2023-08-30 18:50:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:50:24,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:50:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:50:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:50:25,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:50:25,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595752158] [2023-08-30 18:50:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595752158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:50:25,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341444048] [2023-08-30 18:50:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:50:25,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:50:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:50:25,139 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:50:25,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 18:50:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:50:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:50:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:50:25,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:50:25,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:50:25,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:50:25,640 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:50:25,641 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 39 treesize of output 19 [2023-08-30 18:50:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:50:25,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:50:26,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:50:26,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:50:26,461 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:50:26,462 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 278 treesize of output 253 [2023-08-30 18:50:26,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:50:26,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-08-30 18:50:26,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:50:26,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-08-30 18:50:26,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:50:26,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:50:26,793 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:50:26,793 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 278 treesize of output 253 [2023-08-30 18:50:26,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:50:26,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-08-30 18:50:26,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:50:26,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-08-30 18:50:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:50:27,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341444048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:50:27,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:50:27,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2023-08-30 18:50:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331105582] [2023-08-30 18:50:27,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:50:27,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 18:50:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:50:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 18:50:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1077, Unknown=14, NotChecked=0, Total=1260 [2023-08-30 18:50:29,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:31,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:33,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:35,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:37,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:39,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:41,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:44,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:46,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:48,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:50,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:52,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:54,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:56,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:50:58,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:00,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:02,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:04,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:06,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:08,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:10,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:12,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:14,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:16,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:18,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:51:18,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-08-30 18:51:18,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 547 transitions, 10575 flow. Second operand has 36 states, 36 states have (on average 129.58333333333334) internal successors, (4665), 36 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:18,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:18,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-08-30 18:51:18,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:22,886 INFO L130 PetriNetUnfolder]: 6314/12182 cut-off events. [2023-08-30 18:51:22,886 INFO L131 PetriNetUnfolder]: For 206362/206362 co-relation queries the response was YES. [2023-08-30 18:51:23,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97412 conditions, 12182 events. 6314/12182 cut-off events. For 206362/206362 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 105232 event pairs, 1949 based on Foata normal form. 30/12212 useless extension candidates. Maximal degree in co-relation 96625. Up to 7037 conditions per place. [2023-08-30 18:51:23,153 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 457 selfloop transitions, 146 changer transitions 64/667 dead transitions. [2023-08-30 18:51:23,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 667 transitions, 13351 flow [2023-08-30 18:51:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 18:51:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 18:51:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3474 transitions. [2023-08-30 18:51:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766364070711897 [2023-08-30 18:51:23,160 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3474 transitions. [2023-08-30 18:51:23,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3474 transitions. [2023-08-30 18:51:23,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:23,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3474 transitions. [2023-08-30 18:51:23,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 133.6153846153846) internal successors, (3474), 26 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:23,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 483.0) internal successors, (13041), 27 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:23,172 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 483.0) internal successors, (13041), 27 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:23,172 INFO L175 Difference]: Start difference. First operand has 239 places, 547 transitions, 10575 flow. Second operand 26 states and 3474 transitions. [2023-08-30 18:51:23,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 667 transitions, 13351 flow [2023-08-30 18:51:25,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 667 transitions, 13127 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-30 18:51:25,049 INFO L231 Difference]: Finished difference. Result has 264 places, 533 transitions, 10593 flow [2023-08-30 18:51:25,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10593, PETRI_PLACES=264, PETRI_TRANSITIONS=533} [2023-08-30 18:51:25,050 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 239 predicate places. [2023-08-30 18:51:25,050 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 533 transitions, 10593 flow [2023-08-30 18:51:25,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 129.58333333333334) internal successors, (4665), 36 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:25,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:25,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:25,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:25,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 18:51:25,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:25,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1536392364, now seen corresponding path program 8 times [2023-08-30 18:51:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:25,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086338481] [2023-08-30 18:51:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:25,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:25,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086338481] [2023-08-30 18:51:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086338481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:25,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768589073] [2023-08-30 18:51:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:51:25,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:25,817 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:25,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 18:51:25,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:51:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:51:25,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:26,259 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:51:26,259 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 39 treesize of output 19 [2023-08-30 18:51:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:51:26,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:51:26,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768589073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:26,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:51:26,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:51:26,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838700178] [2023-08-30 18:51:26,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:26,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:51:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:26,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:51:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:51:26,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:51:26,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 533 transitions, 10593 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:26,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:26,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:51:26,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:29,524 INFO L130 PetriNetUnfolder]: 6074/11662 cut-off events. [2023-08-30 18:51:29,524 INFO L131 PetriNetUnfolder]: For 250409/250409 co-relation queries the response was YES. [2023-08-30 18:51:29,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98583 conditions, 11662 events. 6074/11662 cut-off events. For 250409/250409 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 99818 event pairs, 2270 based on Foata normal form. 10/11672 useless extension candidates. Maximal degree in co-relation 97715. Up to 7757 conditions per place. [2023-08-30 18:51:29,621 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 473 selfloop transitions, 73 changer transitions 17/563 dead transitions. [2023-08-30 18:51:29,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 563 transitions, 11971 flow [2023-08-30 18:51:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:51:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:51:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1847 transitions. [2023-08-30 18:51:29,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824016563146998 [2023-08-30 18:51:29,624 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1847 transitions. [2023-08-30 18:51:29,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1847 transitions. [2023-08-30 18:51:29,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:29,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1847 transitions. [2023-08-30 18:51:29,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.7) internal successors, (1847), 10 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:29,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:29,629 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:29,629 INFO L175 Difference]: Start difference. First operand has 264 places, 533 transitions, 10593 flow. Second operand 10 states and 1847 transitions. [2023-08-30 18:51:29,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 563 transitions, 11971 flow [2023-08-30 18:51:31,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 563 transitions, 11605 flow, removed 82 selfloop flow, removed 15 redundant places. [2023-08-30 18:51:31,959 INFO L231 Difference]: Finished difference. Result has 253 places, 531 transitions, 10354 flow [2023-08-30 18:51:31,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10354, PETRI_PLACES=253, PETRI_TRANSITIONS=531} [2023-08-30 18:51:31,960 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 228 predicate places. [2023-08-30 18:51:31,961 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 531 transitions, 10354 flow [2023-08-30 18:51:31,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:31,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:31,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:31,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:32,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 18:51:32,163 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:32,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash 86442636, now seen corresponding path program 9 times [2023-08-30 18:51:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:32,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599114837] [2023-08-30 18:51:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599114837] [2023-08-30 18:51:32,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599114837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068718996] [2023-08-30 18:51:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:51:32,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:32,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:32,689 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:32,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 18:51:32,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:51:32,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:51:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:33,145 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:51:33,145 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 39 treesize of output 19 [2023-08-30 18:51:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:51:33,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:51:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068718996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:33,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:51:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:51:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946853232] [2023-08-30 18:51:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:33,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:51:33,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:51:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:51:33,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:51:33,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 531 transitions, 10354 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:33,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:33,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:51:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:36,364 INFO L130 PetriNetUnfolder]: 5984/11477 cut-off events. [2023-08-30 18:51:36,365 INFO L131 PetriNetUnfolder]: For 241783/241783 co-relation queries the response was YES. [2023-08-30 18:51:36,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95276 conditions, 11477 events. 5984/11477 cut-off events. For 241783/241783 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 97121 event pairs, 1782 based on Foata normal form. 35/11512 useless extension candidates. Maximal degree in co-relation 94816. Up to 7692 conditions per place. [2023-08-30 18:51:36,455 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 322 selfloop transitions, 229 changer transitions 12/563 dead transitions. [2023-08-30 18:51:36,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 563 transitions, 11703 flow [2023-08-30 18:51:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:51:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:51:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2026 transitions. [2023-08-30 18:51:36,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38132881611142483 [2023-08-30 18:51:36,458 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2026 transitions. [2023-08-30 18:51:36,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2026 transitions. [2023-08-30 18:51:36,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:36,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2026 transitions. [2023-08-30 18:51:36,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.1818181818182) internal successors, (2026), 11 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:36,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:36,464 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:36,464 INFO L175 Difference]: Start difference. First operand has 253 places, 531 transitions, 10354 flow. Second operand 11 states and 2026 transitions. [2023-08-30 18:51:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 563 transitions, 11703 flow [2023-08-30 18:51:38,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 563 transitions, 11539 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-30 18:51:38,529 INFO L231 Difference]: Finished difference. Result has 252 places, 530 transitions, 10659 flow [2023-08-30 18:51:38,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10659, PETRI_PLACES=252, PETRI_TRANSITIONS=530} [2023-08-30 18:51:38,530 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 227 predicate places. [2023-08-30 18:51:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 530 transitions, 10659 flow [2023-08-30 18:51:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:38,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:38,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:38,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:38,732 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:38,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2043106630, now seen corresponding path program 10 times [2023-08-30 18:51:38,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:38,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912629987] [2023-08-30 18:51:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:38,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:39,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:39,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912629987] [2023-08-30 18:51:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912629987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:39,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701369429] [2023-08-30 18:51:39,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:51:39,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:39,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:39,405 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:39,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 18:51:39,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:51:39,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:51:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:39,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:51:39,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:51:39,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:51:39,871 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:51:39,871 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 39 treesize of output 19 [2023-08-30 18:51:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:51:39,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:51:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:51:40,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701369429] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:40,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:51:40,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 11] total 30 [2023-08-30 18:51:40,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436117588] [2023-08-30 18:51:40,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:40,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:51:40,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:51:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:51:40,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2023-08-30 18:51:40,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 530 transitions, 10659 flow. Second operand has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:40,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:40,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2023-08-30 18:51:40,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:44,712 INFO L130 PetriNetUnfolder]: 6211/12217 cut-off events. [2023-08-30 18:51:44,712 INFO L131 PetriNetUnfolder]: For 277530/277530 co-relation queries the response was YES. [2023-08-30 18:51:44,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102996 conditions, 12217 events. 6211/12217 cut-off events. For 277530/277530 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 107244 event pairs, 1568 based on Foata normal form. 5/12222 useless extension candidates. Maximal degree in co-relation 101995. Up to 7182 conditions per place. [2023-08-30 18:51:44,808 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 347 selfloop transitions, 237 changer transitions 51/635 dead transitions. [2023-08-30 18:51:44,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 635 transitions, 13865 flow [2023-08-30 18:51:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:51:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:51:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1924 transitions. [2023-08-30 18:51:44,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39834368530020703 [2023-08-30 18:51:44,811 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1924 transitions. [2023-08-30 18:51:44,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1924 transitions. [2023-08-30 18:51:44,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:44,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1924 transitions. [2023-08-30 18:51:44,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.4) internal successors, (1924), 10 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:44,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:44,816 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:44,817 INFO L175 Difference]: Start difference. First operand has 252 places, 530 transitions, 10659 flow. Second operand 10 states and 1924 transitions. [2023-08-30 18:51:44,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 635 transitions, 13865 flow [2023-08-30 18:51:47,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 635 transitions, 13315 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 18:51:47,132 INFO L231 Difference]: Finished difference. Result has 257 places, 553 transitions, 11282 flow [2023-08-30 18:51:47,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10233, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11282, PETRI_PLACES=257, PETRI_TRANSITIONS=553} [2023-08-30 18:51:47,133 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-08-30 18:51:47,133 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 553 transitions, 11282 flow [2023-08-30 18:51:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:47,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:47,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:47,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 18:51:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:47,334 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:47,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash -583152636, now seen corresponding path program 11 times [2023-08-30 18:51:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:47,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873751970] [2023-08-30 18:51:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:48,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873751970] [2023-08-30 18:51:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873751970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555416775] [2023-08-30 18:51:48,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:51:48,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:48,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:48,029 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:48,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 18:51:48,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:51:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 18:51:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:48,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:51:48,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:51:48,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:51:48,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:51:48,563 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:51:48,563 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 39 treesize of output 19 [2023-08-30 18:51:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:48,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:51:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:49,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555416775] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:49,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:51:49,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 29 [2023-08-30 18:51:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391454344] [2023-08-30 18:51:49,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:49,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:51:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:51:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:51:49,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 483 [2023-08-30 18:51:49,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 553 transitions, 11282 flow. Second operand has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:49,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:49,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 483 [2023-08-30 18:51:49,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:53,219 INFO L130 PetriNetUnfolder]: 5854/11738 cut-off events. [2023-08-30 18:51:53,219 INFO L131 PetriNetUnfolder]: For 262114/262114 co-relation queries the response was YES. [2023-08-30 18:51:53,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98403 conditions, 11738 events. 5854/11738 cut-off events. For 262114/262114 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 104361 event pairs, 1773 based on Foata normal form. 5/11743 useless extension candidates. Maximal degree in co-relation 98189. Up to 7971 conditions per place. [2023-08-30 18:51:53,384 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 331 selfloop transitions, 236 changer transitions 19/586 dead transitions. [2023-08-30 18:51:53,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 586 transitions, 12707 flow [2023-08-30 18:51:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:51:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:51:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-08-30 18:51:53,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715415019762846 [2023-08-30 18:51:53,387 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-08-30 18:51:53,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-08-30 18:51:53,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:53,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-08-30 18:51:53,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.45454545454547) internal successors, (1974), 11 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,393 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,393 INFO L175 Difference]: Start difference. First operand has 257 places, 553 transitions, 11282 flow. Second operand 11 states and 1974 transitions. [2023-08-30 18:51:53,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 586 transitions, 12707 flow [2023-08-30 18:51:56,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 586 transitions, 12649 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-30 18:51:56,322 INFO L231 Difference]: Finished difference. Result has 263 places, 545 transitions, 11488 flow [2023-08-30 18:51:56,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11226, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11488, PETRI_PLACES=263, PETRI_TRANSITIONS=545} [2023-08-30 18:51:56,323 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 238 predicate places. [2023-08-30 18:51:56,323 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 545 transitions, 11488 flow [2023-08-30 18:51:56,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:56,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:56,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:56,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:56,530 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:56,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1270141606, now seen corresponding path program 12 times [2023-08-30 18:51:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:56,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578697476] [2023-08-30 18:51:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:57,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578697476] [2023-08-30 18:51:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578697476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085908939] [2023-08-30 18:51:57,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:51:57,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:57,116 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:57,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 18:51:57,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 18:51:57,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:57,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:51:57,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:57,503 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:51:57,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-08-30 18:51:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:51:57,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:51:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085908939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:57,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:51:57,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2023-08-30 18:51:57,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569994411] [2023-08-30 18:51:57,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:57,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:51:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:51:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:51:57,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:51:57,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 545 transitions, 11488 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:57,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:57,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:51:57,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:00,991 INFO L130 PetriNetUnfolder]: 5819/11653 cut-off events. [2023-08-30 18:52:00,991 INFO L131 PetriNetUnfolder]: For 266575/266575 co-relation queries the response was YES. [2023-08-30 18:52:01,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98564 conditions, 11653 events. 5819/11653 cut-off events. For 266575/266575 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 103332 event pairs, 1801 based on Foata normal form. 5/11658 useless extension candidates. Maximal degree in co-relation 98172. Up to 7977 conditions per place. [2023-08-30 18:52:01,086 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 326 selfloop transitions, 228 changer transitions 18/572 dead transitions. [2023-08-30 18:52:01,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 572 transitions, 12746 flow [2023-08-30 18:52:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:52:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:52:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2205 transitions. [2023-08-30 18:52:01,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2023-08-30 18:52:01,088 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2205 transitions. [2023-08-30 18:52:01,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2205 transitions. [2023-08-30 18:52:01,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:01,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2205 transitions. [2023-08-30 18:52:01,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.75) internal successors, (2205), 12 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,094 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,094 INFO L175 Difference]: Start difference. First operand has 263 places, 545 transitions, 11488 flow. Second operand 12 states and 2205 transitions. [2023-08-30 18:52:01,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 572 transitions, 12746 flow [2023-08-30 18:52:03,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 572 transitions, 12215 flow, removed 15 selfloop flow, removed 13 redundant places. [2023-08-30 18:52:03,449 INFO L231 Difference]: Finished difference. Result has 257 places, 533 transitions, 11200 flow [2023-08-30 18:52:03,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11200, PETRI_PLACES=257, PETRI_TRANSITIONS=533} [2023-08-30 18:52:03,450 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-08-30 18:52:03,451 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 533 transitions, 11200 flow [2023-08-30 18:52:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:03,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:03,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:03,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:03,654 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:03,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:03,654 INFO L85 PathProgramCache]: Analyzing trace with hash 785848930, now seen corresponding path program 13 times [2023-08-30 18:52:03,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:03,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079321926] [2023-08-30 18:52:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:03,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:04,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:04,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079321926] [2023-08-30 18:52:04,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079321926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:04,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40612141] [2023-08-30 18:52:04,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:52:04,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:04,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:04,307 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:04,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 18:52:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:52:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:52:04,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:52:04,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:52:04,920 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:52:04,920 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 39 treesize of output 19 [2023-08-30 18:52:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:04,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:07,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:07,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:52:07,912 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:52:07,912 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 1142 treesize of output 1021 [2023-08-30 18:52:07,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:07,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-08-30 18:52:07,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-08-30 18:52:08,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:08,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-30 18:52:08,219 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:52:08,219 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 278 treesize of output 253 [2023-08-30 18:52:08,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:08,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-08-30 18:52:08,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:08,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-08-30 18:52:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40612141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:52:08,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:52:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-08-30 18:52:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053675806] [2023-08-30 18:52:08,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:52:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 18:52:08,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 18:52:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1146, Unknown=17, NotChecked=0, Total=1406 [2023-08-30 18:52:11,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-08-30 18:52:11,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 533 transitions, 11200 flow. Second operand has 38 states, 38 states have (on average 129.57894736842104) internal successors, (4924), 38 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:11,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:11,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-08-30 18:52:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:17,910 INFO L130 PetriNetUnfolder]: 5904/11630 cut-off events. [2023-08-30 18:52:17,910 INFO L131 PetriNetUnfolder]: For 277570/277570 co-relation queries the response was YES. [2023-08-30 18:52:18,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99639 conditions, 11630 events. 5904/11630 cut-off events. For 277570/277570 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 101410 event pairs, 1206 based on Foata normal form. 20/11650 useless extension candidates. Maximal degree in co-relation 99407. Up to 6650 conditions per place. [2023-08-30 18:52:18,236 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 478 selfloop transitions, 307 changer transitions 59/844 dead transitions. [2023-08-30 18:52:18,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 844 transitions, 17140 flow [2023-08-30 18:52:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 18:52:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 18:52:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6512 transitions. [2023-08-30 18:52:18,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27515105421050406 [2023-08-30 18:52:18,242 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6512 transitions. [2023-08-30 18:52:18,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6512 transitions. [2023-08-30 18:52:18,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:18,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6512 transitions. [2023-08-30 18:52:18,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 132.89795918367346) internal successors, (6512), 49 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:18,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 483.0) internal successors, (24150), 50 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:18,260 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 483.0) internal successors, (24150), 50 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:18,260 INFO L175 Difference]: Start difference. First operand has 257 places, 533 transitions, 11200 flow. Second operand 49 states and 6512 transitions. [2023-08-30 18:52:18,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 844 transitions, 17140 flow [2023-08-30 18:52:20,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 844 transitions, 16193 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-30 18:52:20,649 INFO L231 Difference]: Finished difference. Result has 306 places, 569 transitions, 12173 flow [2023-08-30 18:52:20,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=12173, PETRI_PLACES=306, PETRI_TRANSITIONS=569} [2023-08-30 18:52:20,649 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 281 predicate places. [2023-08-30 18:52:20,649 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 569 transitions, 12173 flow [2023-08-30 18:52:20,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 129.57894736842104) internal successors, (4924), 38 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:20,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:20,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:20,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:20,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 18:52:20,851 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:20,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1895045882, now seen corresponding path program 14 times [2023-08-30 18:52:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:20,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91203325] [2023-08-30 18:52:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:21,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:21,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91203325] [2023-08-30 18:52:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91203325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860219021] [2023-08-30 18:52:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:52:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:21,334 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:21,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 18:52:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:52:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:21,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:52:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:21,852 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:52:21,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-08-30 18:52:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:21,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:52:21,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860219021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:21,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:52:21,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:52:21,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305791412] [2023-08-30 18:52:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:21,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:52:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:52:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:52:22,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:52:22,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 569 transitions, 12173 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:22,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:22,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:52:22,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:25,548 INFO L130 PetriNetUnfolder]: 5837/11448 cut-off events. [2023-08-30 18:52:25,548 INFO L131 PetriNetUnfolder]: For 330553/330553 co-relation queries the response was YES. [2023-08-30 18:52:25,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102415 conditions, 11448 events. 5837/11448 cut-off events. For 330553/330553 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 99516 event pairs, 2046 based on Foata normal form. 5/11453 useless extension candidates. Maximal degree in co-relation 102318. Up to 7869 conditions per place. [2023-08-30 18:52:25,657 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 532 selfloop transitions, 56 changer transitions 25/613 dead transitions. [2023-08-30 18:52:25,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 613 transitions, 13993 flow [2023-08-30 18:52:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:52:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:52:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2034 transitions. [2023-08-30 18:52:25,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38283455674760025 [2023-08-30 18:52:25,659 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2034 transitions. [2023-08-30 18:52:25,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2034 transitions. [2023-08-30 18:52:25,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:25,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2034 transitions. [2023-08-30 18:52:25,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.9090909090909) internal successors, (2034), 11 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:25,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:25,663 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:25,663 INFO L175 Difference]: Start difference. First operand has 306 places, 569 transitions, 12173 flow. Second operand 11 states and 2034 transitions. [2023-08-30 18:52:25,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 613 transitions, 13993 flow [2023-08-30 18:52:28,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 613 transitions, 13536 flow, removed 196 selfloop flow, removed 19 redundant places. [2023-08-30 18:52:28,453 INFO L231 Difference]: Finished difference. Result has 278 places, 560 transitions, 11681 flow [2023-08-30 18:52:28,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11818, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11681, PETRI_PLACES=278, PETRI_TRANSITIONS=560} [2023-08-30 18:52:28,454 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2023-08-30 18:52:28,454 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 560 transitions, 11681 flow [2023-08-30 18:52:28,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:28,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:28,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:28,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 18:52:28,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:28,656 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:28,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1442779098, now seen corresponding path program 15 times [2023-08-30 18:52:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449147489] [2023-08-30 18:52:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:29,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449147489] [2023-08-30 18:52:29,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449147489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094128860] [2023-08-30 18:52:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:52:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:29,084 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:29,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 18:52:29,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:52:29,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:52:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:29,544 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:52:29,544 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 39 treesize of output 19 [2023-08-30 18:52:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:29,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:52:29,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094128860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:29,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:52:29,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-08-30 18:52:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088790318] [2023-08-30 18:52:29,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:29,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:52:29,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:52:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:52:30,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-08-30 18:52:30,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 560 transitions, 11681 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:30,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:30,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-08-30 18:52:30,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:32,903 INFO L130 PetriNetUnfolder]: 5797/11338 cut-off events. [2023-08-30 18:52:32,903 INFO L131 PetriNetUnfolder]: For 320621/320621 co-relation queries the response was YES. [2023-08-30 18:52:32,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100738 conditions, 11338 events. 5797/11338 cut-off events. For 320621/320621 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 97861 event pairs, 2165 based on Foata normal form. 5/11343 useless extension candidates. Maximal degree in co-relation 100646. Up to 7869 conditions per place. [2023-08-30 18:52:33,006 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 511 selfloop transitions, 58 changer transitions 19/588 dead transitions. [2023-08-30 18:52:33,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 588 transitions, 13125 flow [2023-08-30 18:52:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:52:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:52:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1844 transitions. [2023-08-30 18:52:33,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38178053830227743 [2023-08-30 18:52:33,009 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1844 transitions. [2023-08-30 18:52:33,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1844 transitions. [2023-08-30 18:52:33,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:33,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1844 transitions. [2023-08-30 18:52:33,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.4) internal successors, (1844), 10 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:33,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:33,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:33,012 INFO L175 Difference]: Start difference. First operand has 278 places, 560 transitions, 11681 flow. Second operand 10 states and 1844 transitions. [2023-08-30 18:52:33,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 588 transitions, 13125 flow [2023-08-30 18:52:35,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 588 transitions, 12974 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-30 18:52:35,722 INFO L231 Difference]: Finished difference. Result has 271 places, 551 transitions, 11483 flow [2023-08-30 18:52:35,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11483, PETRI_PLACES=271, PETRI_TRANSITIONS=551} [2023-08-30 18:52:35,723 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2023-08-30 18:52:35,723 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 551 transitions, 11483 flow [2023-08-30 18:52:35,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:35,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:35,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:35,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:35,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:35,924 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:35,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1271388532, now seen corresponding path program 16 times [2023-08-30 18:52:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304235580] [2023-08-30 18:52:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:35,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:36,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:36,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304235580] [2023-08-30 18:52:36,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304235580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:36,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441660262] [2023-08-30 18:52:36,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:52:36,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:36,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:36,477 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:36,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 18:52:36,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:52:36,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 18:52:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:52:36,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:52:36,887 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:52:36,887 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 39 treesize of output 19 [2023-08-30 18:52:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:36,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:52:36,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441660262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:36,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:52:36,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2023-08-30 18:52:36,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114517528] [2023-08-30 18:52:36,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:36,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:52:36,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:52:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:52:37,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-08-30 18:52:37,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 551 transitions, 11483 flow. Second operand has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:37,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:37,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-08-30 18:52:37,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:40,476 INFO L130 PetriNetUnfolder]: 5752/11268 cut-off events. [2023-08-30 18:52:40,476 INFO L131 PetriNetUnfolder]: For 314978/314978 co-relation queries the response was YES. [2023-08-30 18:52:40,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99596 conditions, 11268 events. 5752/11268 cut-off events. For 314978/314978 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 97337 event pairs, 1981 based on Foata normal form. 10/11278 useless extension candidates. Maximal degree in co-relation 99506. Up to 7865 conditions per place. [2023-08-30 18:52:40,582 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 459 selfloop transitions, 113 changer transitions 21/593 dead transitions. [2023-08-30 18:52:40,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 593 transitions, 13352 flow [2023-08-30 18:52:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:52:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:52:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1831 transitions. [2023-08-30 18:52:40,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37908902691511387 [2023-08-30 18:52:40,584 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1831 transitions. [2023-08-30 18:52:40,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1831 transitions. [2023-08-30 18:52:40,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:40,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1831 transitions. [2023-08-30 18:52:40,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 183.1) internal successors, (1831), 10 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,587 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,587 INFO L175 Difference]: Start difference. First operand has 271 places, 551 transitions, 11483 flow. Second operand 10 states and 1831 transitions. [2023-08-30 18:52:40,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 593 transitions, 13352 flow [2023-08-30 18:52:43,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 593 transitions, 13076 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-08-30 18:52:43,428 INFO L231 Difference]: Finished difference. Result has 267 places, 549 transitions, 11637 flow [2023-08-30 18:52:43,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11233, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11637, PETRI_PLACES=267, PETRI_TRANSITIONS=549} [2023-08-30 18:52:43,429 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 242 predicate places. [2023-08-30 18:52:43,429 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 549 transitions, 11637 flow [2023-08-30 18:52:43,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:43,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:43,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:43,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:43,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 18:52:43,630 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:43,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1771610170, now seen corresponding path program 17 times [2023-08-30 18:52:43,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:43,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948323284] [2023-08-30 18:52:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:43,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:44,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948323284] [2023-08-30 18:52:44,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948323284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454143589] [2023-08-30 18:52:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:52:44,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:44,077 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:44,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 18:52:44,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:52:44,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 18:52:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:44,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:52:44,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:52:44,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:52:44,538 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:52:44,539 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 52 treesize of output 24 [2023-08-30 18:52:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:44,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:45,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454143589] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:45,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:52:45,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 11] total 26 [2023-08-30 18:52:45,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044730974] [2023-08-30 18:52:45,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:45,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:52:45,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:52:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=598, Unknown=14, NotChecked=0, Total=756 [2023-08-30 18:52:45,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 483 [2023-08-30 18:52:45,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 549 transitions, 11637 flow. Second operand has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:45,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:45,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 483 [2023-08-30 18:52:45,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:50,842 INFO L130 PetriNetUnfolder]: 5756/11235 cut-off events. [2023-08-30 18:52:50,842 INFO L131 PetriNetUnfolder]: For 323262/323262 co-relation queries the response was YES. [2023-08-30 18:52:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99707 conditions, 11235 events. 5756/11235 cut-off events. For 323262/323262 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 96650 event pairs, 2166 based on Foata normal form. 5/11240 useless extension candidates. Maximal degree in co-relation 99616. Up to 7863 conditions per place. [2023-08-30 18:52:50,948 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 508 selfloop transitions, 123 changer transitions 12/643 dead transitions. [2023-08-30 18:52:50,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 643 transitions, 14617 flow [2023-08-30 18:52:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:52:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:52:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1898 transitions. [2023-08-30 18:52:50,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3022774327122153 [2023-08-30 18:52:50,951 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1898 transitions. [2023-08-30 18:52:50,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1898 transitions. [2023-08-30 18:52:50,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:50,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1898 transitions. [2023-08-30 18:52:50,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:50,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:50,955 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:50,955 INFO L175 Difference]: Start difference. First operand has 267 places, 549 transitions, 11637 flow. Second operand 13 states and 1898 transitions. [2023-08-30 18:52:50,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 643 transitions, 14617 flow [2023-08-30 18:52:53,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 643 transitions, 14324 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-08-30 18:52:53,618 INFO L231 Difference]: Finished difference. Result has 273 places, 576 transitions, 12331 flow [2023-08-30 18:52:53,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12331, PETRI_PLACES=273, PETRI_TRANSITIONS=576} [2023-08-30 18:52:53,619 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-08-30 18:52:53,619 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 576 transitions, 12331 flow [2023-08-30 18:52:53,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:53,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:53,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:53,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 18:52:53,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 18:52:53,829 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:53,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash -99068368, now seen corresponding path program 18 times [2023-08-30 18:52:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480995391] [2023-08-30 18:52:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:52:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480995391] [2023-08-30 18:52:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480995391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35111166] [2023-08-30 18:52:54,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:52:54,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:54,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:54,487 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:54,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 18:52:54,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 18:52:54,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:52:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:54,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-08-30 18:52:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:52:54,960 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:52:54,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-08-30 18:52:55,121 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:52:55,121 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 39 treesize of output 19 [2023-08-30 18:52:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:55,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:52:55,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35111166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:55,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:52:55,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2023-08-30 18:52:55,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865528566] [2023-08-30 18:52:55,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:55,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:52:55,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:52:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:52:55,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-08-30 18:52:55,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 576 transitions, 12331 flow. Second operand has 13 states, 13 states have (on average 176.53846153846155) internal successors, (2295), 13 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:55,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:55,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-08-30 18:52:55,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:59,033 INFO L130 PetriNetUnfolder]: 5695/11129 cut-off events. [2023-08-30 18:52:59,033 INFO L131 PetriNetUnfolder]: For 319229/319229 co-relation queries the response was YES. [2023-08-30 18:52:59,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98565 conditions, 11129 events. 5695/11129 cut-off events. For 319229/319229 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 95880 event pairs, 1812 based on Foata normal form. 45/11174 useless extension candidates. Maximal degree in co-relation 98472. Up to 7869 conditions per place. [2023-08-30 18:52:59,127 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 465 selfloop transitions, 125 changer transitions 23/613 dead transitions. [2023-08-30 18:52:59,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 613 transitions, 14061 flow [2023-08-30 18:52:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:52:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:52:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1822 transitions. [2023-08-30 18:52:59,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772256728778468 [2023-08-30 18:52:59,129 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1822 transitions. [2023-08-30 18:52:59,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1822 transitions. [2023-08-30 18:52:59,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:59,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1822 transitions. [2023-08-30 18:52:59,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 182.2) internal successors, (1822), 10 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:59,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:59,134 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:59,134 INFO L175 Difference]: Start difference. First operand has 273 places, 576 transitions, 12331 flow. Second operand 10 states and 1822 transitions. [2023-08-30 18:52:59,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 613 transitions, 14061 flow [2023-08-30 18:53:01,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 613 transitions, 13996 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-30 18:53:01,817 INFO L231 Difference]: Finished difference. Result has 277 places, 563 transitions, 12334 flow [2023-08-30 18:53:01,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12221, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12334, PETRI_PLACES=277, PETRI_TRANSITIONS=563} [2023-08-30 18:53:01,818 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 252 predicate places. [2023-08-30 18:53:01,818 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 563 transitions, 12334 flow [2023-08-30 18:53:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 176.53846153846155) internal successors, (2295), 13 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:01,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:01,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:01,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 18:53:02,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 18:53:02,019 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:02,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash -349727208, now seen corresponding path program 19 times [2023-08-30 18:53:02,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:02,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605764930] [2023-08-30 18:53:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:02,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:53:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:02,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605764930] [2023-08-30 18:53:02,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605764930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:02,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41429174] [2023-08-30 18:53:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:53:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:02,676 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:02,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 18:53:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 18:53:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:02,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:53:02,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:53:03,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:53:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:53:03,188 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:53:03,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2023-08-30 18:53:03,364 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:53:03,364 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 39 treesize of output 19 [2023-08-30 18:53:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:53:03,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:08,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:08,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 125 [2023-08-30 18:53:08,667 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:08,668 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 2042 treesize of output 1810 [2023-08-30 18:53:08,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:08,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 978 treesize of output 918 [2023-08-30 18:53:08,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:08,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 869 treesize of output 773 [2023-08-30 18:53:14,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:14,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 30 [2023-08-30 18:53:14,837 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:53:14,837 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 66 treesize of output 57 [2023-08-30 18:53:14,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:14,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-08-30 18:53:14,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:14,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 30 [2023-08-30 18:53:14,887 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:53:14,887 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 66 treesize of output 57 [2023-08-30 18:53:14,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:14,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-08-30 18:53:14,923 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 18:53:14,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 1 [2023-08-30 18:53:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:53:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41429174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:19,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2023-08-30 18:53:19,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007132611] [2023-08-30 18:53:19,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 18:53:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 18:53:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1199, Unknown=29, NotChecked=0, Total=1406 [2023-08-30 18:53:19,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-08-30 18:53:19,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 563 transitions, 12334 flow. Second operand has 38 states, 38 states have (on average 129.5) internal successors, (4921), 38 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:19,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:19,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-08-30 18:53:19,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:28,421 INFO L130 PetriNetUnfolder]: 5562/10870 cut-off events. [2023-08-30 18:53:28,421 INFO L131 PetriNetUnfolder]: For 314747/314747 co-relation queries the response was YES. [2023-08-30 18:53:28,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96749 conditions, 10870 events. 5562/10870 cut-off events. For 314747/314747 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 93128 event pairs, 1247 based on Foata normal form. 65/10935 useless extension candidates. Maximal degree in co-relation 96654. Up to 4535 conditions per place. [2023-08-30 18:53:28,534 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 412 selfloop transitions, 244 changer transitions 33/689 dead transitions. [2023-08-30 18:53:28,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 689 transitions, 15650 flow [2023-08-30 18:53:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 18:53:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 18:53:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2547 transitions. [2023-08-30 18:53:28,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27754168028767573 [2023-08-30 18:53:28,537 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2547 transitions. [2023-08-30 18:53:28,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2547 transitions. [2023-08-30 18:53:28,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:28,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2547 transitions. [2023-08-30 18:53:28,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 134.05263157894737) internal successors, (2547), 19 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:28,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:28,543 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:28,543 INFO L175 Difference]: Start difference. First operand has 277 places, 563 transitions, 12334 flow. Second operand 19 states and 2547 transitions. [2023-08-30 18:53:28,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 689 transitions, 15650 flow [2023-08-30 18:53:31,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 689 transitions, 15396 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-30 18:53:31,159 INFO L231 Difference]: Finished difference. Result has 286 places, 577 transitions, 13105 flow [2023-08-30 18:53:31,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11819, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13105, PETRI_PLACES=286, PETRI_TRANSITIONS=577} [2023-08-30 18:53:31,160 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 261 predicate places. [2023-08-30 18:53:31,160 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 577 transitions, 13105 flow [2023-08-30 18:53:31,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 129.5) internal successors, (4921), 38 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:31,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:31,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:31,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-30 18:53:31,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 18:53:31,361 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:31,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash 904650408, now seen corresponding path program 20 times [2023-08-30 18:53:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:31,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516615463] [2023-08-30 18:53:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:53:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:31,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516615463] [2023-08-30 18:53:31,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516615463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578024816] [2023-08-30 18:53:31,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:53:31,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:31,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:31,900 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:31,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 18:53:32,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:53:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:53:32,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:32,286 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:53:32,287 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 52 treesize of output 24 [2023-08-30 18:53:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:32,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:53:32,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578024816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:53:32,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:53:32,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2023-08-30 18:53:32,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107161566] [2023-08-30 18:53:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:53:32,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:53:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:53:32,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-30 18:53:32,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 483 [2023-08-30 18:53:32,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 577 transitions, 13105 flow. Second operand has 11 states, 11 states have (on average 181.8181818181818) internal successors, (2000), 11 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:32,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:32,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 483 [2023-08-30 18:53:32,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:35,200 INFO L130 PetriNetUnfolder]: 5508/10701 cut-off events. [2023-08-30 18:53:35,201 INFO L131 PetriNetUnfolder]: For 321076/321076 co-relation queries the response was YES. [2023-08-30 18:53:35,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97511 conditions, 10701 events. 5508/10701 cut-off events. For 321076/321076 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 90737 event pairs, 1870 based on Foata normal form. 5/10706 useless extension candidates. Maximal degree in co-relation 97416. Up to 7964 conditions per place. [2023-08-30 18:53:35,324 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 524 selfloop transitions, 72 changer transitions 7/603 dead transitions. [2023-08-30 18:53:35,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 603 transitions, 14583 flow [2023-08-30 18:53:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:53:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:53:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1682 transitions. [2023-08-30 18:53:35,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38693351736829995 [2023-08-30 18:53:35,326 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1682 transitions. [2023-08-30 18:53:35,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1682 transitions. [2023-08-30 18:53:35,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:35,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1682 transitions. [2023-08-30 18:53:35,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.88888888888889) internal successors, (1682), 9 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:35,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:35,330 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:35,331 INFO L175 Difference]: Start difference. First operand has 286 places, 577 transitions, 13105 flow. Second operand 9 states and 1682 transitions. [2023-08-30 18:53:35,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 603 transitions, 14583 flow [2023-08-30 18:53:38,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 603 transitions, 14229 flow, removed 42 selfloop flow, removed 15 redundant places. [2023-08-30 18:53:38,170 INFO L231 Difference]: Finished difference. Result has 275 places, 576 transitions, 12907 flow [2023-08-30 18:53:38,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12765, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12907, PETRI_PLACES=275, PETRI_TRANSITIONS=576} [2023-08-30 18:53:38,171 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2023-08-30 18:53:38,171 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 576 transitions, 12907 flow [2023-08-30 18:53:38,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 181.8181818181818) internal successors, (2000), 11 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:38,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:38,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-30 18:53:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:38,386 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:38,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash 642364352, now seen corresponding path program 1 times [2023-08-30 18:53:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:38,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595930202] [2023-08-30 18:53:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:38,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595930202] [2023-08-30 18:53:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595930202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287278730] [2023-08-30 18:53:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:38,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:38,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:38,661 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:38,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 18:53:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 18:53:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:53:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:53:38,852 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:53:38,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 18:53:38,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:53:38,910 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:53:38,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:53:38,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:53:38,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:53:39,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:53:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:53:39,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287278730] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:39,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:53:39,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 23 [2023-08-30 18:53:39,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186806986] [2023-08-30 18:53:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:53:39,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:53:39,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:53:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:53:39,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 483 [2023-08-30 18:53:39,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 576 transitions, 12907 flow. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:39,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:39,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 483 [2023-08-30 18:53:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:41,863 INFO L130 PetriNetUnfolder]: 5504/10718 cut-off events. [2023-08-30 18:53:41,863 INFO L131 PetriNetUnfolder]: For 319308/319308 co-relation queries the response was YES. [2023-08-30 18:53:41,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96891 conditions, 10718 events. 5504/10718 cut-off events. For 319308/319308 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 90926 event pairs, 2113 based on Foata normal form. 20/10738 useless extension candidates. Maximal degree in co-relation 96799. Up to 9354 conditions per place. [2023-08-30 18:53:41,976 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 593 selfloop transitions, 41 changer transitions 2/636 dead transitions. [2023-08-30 18:53:41,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 636 transitions, 15320 flow [2023-08-30 18:53:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:53:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:53:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1236 transitions. [2023-08-30 18:53:41,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42650103519668736 [2023-08-30 18:53:41,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1236 transitions. [2023-08-30 18:53:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1236 transitions. [2023-08-30 18:53:41,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:41,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1236 transitions. [2023-08-30 18:53:41,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:41,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:41,983 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:41,984 INFO L175 Difference]: Start difference. First operand has 275 places, 576 transitions, 12907 flow. Second operand 6 states and 1236 transitions. [2023-08-30 18:53:41,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 636 transitions, 15320 flow [2023-08-30 18:53:44,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 636 transitions, 14777 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-30 18:53:44,545 INFO L231 Difference]: Finished difference. Result has 267 places, 588 transitions, 12880 flow [2023-08-30 18:53:44,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12880, PETRI_PLACES=267, PETRI_TRANSITIONS=588} [2023-08-30 18:53:44,547 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 242 predicate places. [2023-08-30 18:53:44,547 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 588 transitions, 12880 flow [2023-08-30 18:53:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:44,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:44,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:44,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 18:53:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 18:53:44,753 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:44,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2101077848, now seen corresponding path program 2 times [2023-08-30 18:53:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678244222] [2023-08-30 18:53:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:44,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:44,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678244222] [2023-08-30 18:53:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678244222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:53:44,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:53:44,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 18:53:44,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338626012] [2023-08-30 18:53:44,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:53:44,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:53:44,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:53:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:53:45,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:53:45,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 588 transitions, 12880 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:45,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:53:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:47,922 INFO L130 PetriNetUnfolder]: 5576/10846 cut-off events. [2023-08-30 18:53:47,923 INFO L131 PetriNetUnfolder]: For 315481/315481 co-relation queries the response was YES. [2023-08-30 18:53:47,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97298 conditions, 10846 events. 5576/10846 cut-off events. For 315481/315481 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 92192 event pairs, 1987 based on Foata normal form. 56/10902 useless extension candidates. Maximal degree in co-relation 97204. Up to 8036 conditions per place. [2023-08-30 18:53:48,016 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 543 selfloop transitions, 74 changer transitions 1/618 dead transitions. [2023-08-30 18:53:48,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 618 transitions, 14649 flow [2023-08-30 18:53:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:53:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:53:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-08-30 18:53:48,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137829044661343 [2023-08-30 18:53:48,018 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-08-30 18:53:48,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-08-30 18:53:48,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:48,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-08-30 18:53:48,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:48,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:48,021 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:48,022 INFO L175 Difference]: Start difference. First operand has 267 places, 588 transitions, 12880 flow. Second operand 7 states and 1399 transitions. [2023-08-30 18:53:48,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 618 transitions, 14649 flow [2023-08-30 18:53:50,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 618 transitions, 14599 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-30 18:53:50,203 INFO L231 Difference]: Finished difference. Result has 273 places, 594 transitions, 13179 flow [2023-08-30 18:53:50,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12835, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13179, PETRI_PLACES=273, PETRI_TRANSITIONS=594} [2023-08-30 18:53:50,203 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-08-30 18:53:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 594 transitions, 13179 flow [2023-08-30 18:53:50,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:50,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:50,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:50,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-30 18:53:50,204 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:50,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2001726862, now seen corresponding path program 3 times [2023-08-30 18:53:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:50,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751198481] [2023-08-30 18:53:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751198481] [2023-08-30 18:53:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751198481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:53:50,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:53:50,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 18:53:50,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334860720] [2023-08-30 18:53:50,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:53:50,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:53:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:53:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:53:50,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:53:50,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 594 transitions, 13179 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:50,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:50,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:53:50,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:53,185 INFO L130 PetriNetUnfolder]: 5247/10141 cut-off events. [2023-08-30 18:53:53,185 INFO L131 PetriNetUnfolder]: For 311998/311998 co-relation queries the response was YES. [2023-08-30 18:53:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92613 conditions, 10141 events. 5247/10141 cut-off events. For 311998/311998 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 84309 event pairs, 1985 based on Foata normal form. 56/10197 useless extension candidates. Maximal degree in co-relation 92518. Up to 8040 conditions per place. [2023-08-30 18:53:53,304 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 495 selfloop transitions, 87 changer transitions 0/582 dead transitions. [2023-08-30 18:53:53,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 582 transitions, 13962 flow [2023-08-30 18:53:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:53:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:53:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-08-30 18:53:53,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137829044661343 [2023-08-30 18:53:53,305 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-08-30 18:53:53,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-08-30 18:53:53,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:53,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-08-30 18:53:53,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:53,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:53,309 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:53,309 INFO L175 Difference]: Start difference. First operand has 273 places, 594 transitions, 13179 flow. Second operand 7 states and 1399 transitions. [2023-08-30 18:53:53,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 582 transitions, 13962 flow [2023-08-30 18:53:55,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 582 transitions, 13810 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-08-30 18:53:55,770 INFO L231 Difference]: Finished difference. Result has 264 places, 563 transitions, 12633 flow [2023-08-30 18:53:55,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12417, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12633, PETRI_PLACES=264, PETRI_TRANSITIONS=563} [2023-08-30 18:53:55,770 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 239 predicate places. [2023-08-30 18:53:55,770 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 563 transitions, 12633 flow [2023-08-30 18:53:55,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:55,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:55,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:55,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-30 18:53:55,771 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:55,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash 150263440, now seen corresponding path program 4 times [2023-08-30 18:53:55,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:55,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520454163] [2023-08-30 18:53:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:55,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:56,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520454163] [2023-08-30 18:53:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520454163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748431426] [2023-08-30 18:53:56,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:53:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:56,034 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:56,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 18:53:56,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:53:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 18:53:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:56,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:56,251 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:53:56,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-30 18:53:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:53:56,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748431426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:56,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:56,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-08-30 18:53:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770674090] [2023-08-30 18:53:56,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:56,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:53:56,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:56,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:53:56,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:53:56,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:53:56,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 563 transitions, 12633 flow. Second operand has 15 states, 15 states have (on average 194.6) internal successors, (2919), 15 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:56,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:56,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:53:56,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:59,154 INFO L130 PetriNetUnfolder]: 5289/10215 cut-off events. [2023-08-30 18:53:59,154 INFO L131 PetriNetUnfolder]: For 270388/270388 co-relation queries the response was YES. [2023-08-30 18:53:59,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91213 conditions, 10215 events. 5289/10215 cut-off events. For 270388/270388 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 84919 event pairs, 573 based on Foata normal form. 20/10235 useless extension candidates. Maximal degree in co-relation 91122. Up to 5855 conditions per place. [2023-08-30 18:53:59,267 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 354 selfloop transitions, 269 changer transitions 14/637 dead transitions. [2023-08-30 18:53:59,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 637 transitions, 15115 flow [2023-08-30 18:53:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:53:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:53:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1590 transitions. [2023-08-30 18:53:59,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114906832298137 [2023-08-30 18:53:59,269 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1590 transitions. [2023-08-30 18:53:59,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1590 transitions. [2023-08-30 18:53:59,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:59,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1590 transitions. [2023-08-30 18:53:59,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.75) internal successors, (1590), 8 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:59,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:59,272 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:59,272 INFO L175 Difference]: Start difference. First operand has 264 places, 563 transitions, 12633 flow. Second operand 8 states and 1590 transitions. [2023-08-30 18:53:59,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 637 transitions, 15115 flow [2023-08-30 18:54:01,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 637 transitions, 15016 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 18:54:01,662 INFO L231 Difference]: Finished difference. Result has 269 places, 565 transitions, 13146 flow [2023-08-30 18:54:01,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12538, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13146, PETRI_PLACES=269, PETRI_TRANSITIONS=565} [2023-08-30 18:54:01,662 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 244 predicate places. [2023-08-30 18:54:01,662 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 565 transitions, 13146 flow [2023-08-30 18:54:01,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.6) internal successors, (2919), 15 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:01,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:01,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:01,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 18:54:01,868 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:01,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2119395894, now seen corresponding path program 5 times [2023-08-30 18:54:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:01,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995592107] [2023-08-30 18:54:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:02,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995592107] [2023-08-30 18:54:02,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995592107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:54:02,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:54:02,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 18:54:02,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802950612] [2023-08-30 18:54:02,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:54:02,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:54:02,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:54:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:54:02,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:54:02,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 565 transitions, 13146 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:02,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:02,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:54:02,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:04,873 INFO L130 PetriNetUnfolder]: 5300/10232 cut-off events. [2023-08-30 18:54:04,873 INFO L131 PetriNetUnfolder]: For 301905/301905 co-relation queries the response was YES. [2023-08-30 18:54:04,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93275 conditions, 10232 events. 5300/10232 cut-off events. For 301905/301905 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 84959 event pairs, 1560 based on Foata normal form. 20/10252 useless extension candidates. Maximal degree in co-relation 93182. Up to 6994 conditions per place. [2023-08-30 18:54:04,967 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 316 selfloop transitions, 275 changer transitions 6/597 dead transitions. [2023-08-30 18:54:04,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 597 transitions, 14863 flow [2023-08-30 18:54:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:54:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:54:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-08-30 18:54:04,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137829044661343 [2023-08-30 18:54:04,969 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-08-30 18:54:04,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-08-30 18:54:04,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:04,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-08-30 18:54:04,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:04,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:04,971 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:04,972 INFO L175 Difference]: Start difference. First operand has 269 places, 565 transitions, 13146 flow. Second operand 7 states and 1399 transitions. [2023-08-30 18:54:04,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 597 transitions, 14863 flow [2023-08-30 18:54:06,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 597 transitions, 14229 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 18:54:06,946 INFO L231 Difference]: Finished difference. Result has 271 places, 566 transitions, 13146 flow [2023-08-30 18:54:06,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13146, PETRI_PLACES=271, PETRI_TRANSITIONS=566} [2023-08-30 18:54:06,946 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2023-08-30 18:54:06,946 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 566 transitions, 13146 flow [2023-08-30 18:54:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:06,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-30 18:54:06,947 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:06,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1912599798, now seen corresponding path program 6 times [2023-08-30 18:54:06,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:06,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947166447] [2023-08-30 18:54:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:06,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:07,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947166447] [2023-08-30 18:54:07,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947166447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:54:07,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:54:07,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 18:54:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60329026] [2023-08-30 18:54:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:54:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:54:07,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:54:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:54:07,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:54:07,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 566 transitions, 13146 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:07,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:07,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:54:07,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:09,694 INFO L130 PetriNetUnfolder]: 5087/9813 cut-off events. [2023-08-30 18:54:09,694 INFO L131 PetriNetUnfolder]: For 282542/282542 co-relation queries the response was YES. [2023-08-30 18:54:09,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89527 conditions, 9813 events. 5087/9813 cut-off events. For 282542/282542 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 80709 event pairs, 1558 based on Foata normal form. 36/9849 useless extension candidates. Maximal degree in co-relation 89434. Up to 7080 conditions per place. [2023-08-30 18:54:09,807 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 276 selfloop transitions, 275 changer transitions 6/557 dead transitions. [2023-08-30 18:54:09,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 557 transitions, 13951 flow [2023-08-30 18:54:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:54:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:54:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1389 transitions. [2023-08-30 18:54:09,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108251996450754 [2023-08-30 18:54:09,809 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1389 transitions. [2023-08-30 18:54:09,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1389 transitions. [2023-08-30 18:54:09,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:09,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1389 transitions. [2023-08-30 18:54:09,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.42857142857142) internal successors, (1389), 7 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:09,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:09,811 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:09,811 INFO L175 Difference]: Start difference. First operand has 271 places, 566 transitions, 13146 flow. Second operand 7 states and 1389 transitions. [2023-08-30 18:54:09,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 557 transitions, 13951 flow [2023-08-30 18:54:12,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 557 transitions, 13603 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-08-30 18:54:12,110 INFO L231 Difference]: Finished difference. Result has 259 places, 538 transitions, 12816 flow [2023-08-30 18:54:12,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12371, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12816, PETRI_PLACES=259, PETRI_TRANSITIONS=538} [2023-08-30 18:54:12,111 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 234 predicate places. [2023-08-30 18:54:12,111 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 538 transitions, 12816 flow [2023-08-30 18:54:12,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:12,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:12,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:12,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-30 18:54:12,112 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:12,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash 496765336, now seen corresponding path program 7 times [2023-08-30 18:54:12,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:12,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443368253] [2023-08-30 18:54:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:12,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:12,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:12,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443368253] [2023-08-30 18:54:12,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443368253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:54:12,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:54:12,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 18:54:12,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265774978] [2023-08-30 18:54:12,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:54:12,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:54:12,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:12,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:54:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 18:54:12,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-08-30 18:54:12,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 538 transitions, 12816 flow. Second operand has 10 states, 10 states have (on average 191.1) internal successors, (1911), 10 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:12,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:12,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-08-30 18:54:12,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:14,941 INFO L130 PetriNetUnfolder]: 4998/9642 cut-off events. [2023-08-30 18:54:14,942 INFO L131 PetriNetUnfolder]: For 257939/257939 co-relation queries the response was YES. [2023-08-30 18:54:15,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87129 conditions, 9642 events. 4998/9642 cut-off events. For 257939/257939 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 79202 event pairs, 1860 based on Foata normal form. 20/9662 useless extension candidates. Maximal degree in co-relation 87043. Up to 8070 conditions per place. [2023-08-30 18:54:15,050 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 471 selfloop transitions, 84 changer transitions 2/557 dead transitions. [2023-08-30 18:54:15,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 557 transitions, 14160 flow [2023-08-30 18:54:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:54:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:54:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1566 transitions. [2023-08-30 18:54:15,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052795031055901 [2023-08-30 18:54:15,053 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1566 transitions. [2023-08-30 18:54:15,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1566 transitions. [2023-08-30 18:54:15,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:15,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1566 transitions. [2023-08-30 18:54:15,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:15,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:15,057 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:15,058 INFO L175 Difference]: Start difference. First operand has 259 places, 538 transitions, 12816 flow. Second operand 8 states and 1566 transitions. [2023-08-30 18:54:15,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 557 transitions, 14160 flow [2023-08-30 18:54:16,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 557 transitions, 13534 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 18:54:16,809 INFO L231 Difference]: Finished difference. Result has 258 places, 535 transitions, 12323 flow [2023-08-30 18:54:16,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12151, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12323, PETRI_PLACES=258, PETRI_TRANSITIONS=535} [2023-08-30 18:54:16,809 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 233 predicate places. [2023-08-30 18:54:16,810 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 535 transitions, 12323 flow [2023-08-30 18:54:16,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 191.1) internal successors, (1911), 10 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:16,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:16,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:16,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-30 18:54:16,810 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:16,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1130417944, now seen corresponding path program 8 times [2023-08-30 18:54:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:16,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283985663] [2023-08-30 18:54:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:16,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283985663] [2023-08-30 18:54:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283985663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:54:17,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:54:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 18:54:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746328534] [2023-08-30 18:54:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:54:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:54:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:54:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:54:17,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-08-30 18:54:17,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 535 transitions, 12323 flow. Second operand has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:17,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:17,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-08-30 18:54:17,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:20,083 INFO L130 PetriNetUnfolder]: 5058/9807 cut-off events. [2023-08-30 18:54:20,083 INFO L131 PetriNetUnfolder]: For 247148/247148 co-relation queries the response was YES. [2023-08-30 18:54:20,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87256 conditions, 9807 events. 5058/9807 cut-off events. For 247148/247148 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 81261 event pairs, 1827 based on Foata normal form. 30/9837 useless extension candidates. Maximal degree in co-relation 87170. Up to 8070 conditions per place. [2023-08-30 18:54:20,167 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 506 selfloop transitions, 59 changer transitions 19/584 dead transitions. [2023-08-30 18:54:20,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 584 transitions, 14154 flow [2023-08-30 18:54:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:54:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:54:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1957 transitions. [2023-08-30 18:54:20,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405175983436853 [2023-08-30 18:54:20,169 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1957 transitions. [2023-08-30 18:54:20,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1957 transitions. [2023-08-30 18:54:20,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:20,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1957 transitions. [2023-08-30 18:54:20,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:20,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:20,174 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:20,175 INFO L175 Difference]: Start difference. First operand has 258 places, 535 transitions, 12323 flow. Second operand 10 states and 1957 transitions. [2023-08-30 18:54:20,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 584 transitions, 14154 flow [2023-08-30 18:54:21,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 584 transitions, 14038 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 18:54:21,901 INFO L231 Difference]: Finished difference. Result has 261 places, 526 transitions, 12123 flow [2023-08-30 18:54:21,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12207, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12123, PETRI_PLACES=261, PETRI_TRANSITIONS=526} [2023-08-30 18:54:21,902 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 236 predicate places. [2023-08-30 18:54:21,902 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 526 transitions, 12123 flow [2023-08-30 18:54:21,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:21,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:21,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:21,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-30 18:54:21,903 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:21,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:21,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1778753870, now seen corresponding path program 9 times [2023-08-30 18:54:21,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:21,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219313493] [2023-08-30 18:54:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:21,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:22,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:22,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219313493] [2023-08-30 18:54:22,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219313493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:22,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25741309] [2023-08-30 18:54:22,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:54:22,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:22,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:22,133 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:54:22,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 18:54:22,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:54:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:54:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:22,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:22,463 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:54:22,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:54:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25741309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:22,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:22,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-08-30 18:54:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772294582] [2023-08-30 18:54:22,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:54:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:54:22,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:54:22,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:54:22,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 526 transitions, 12123 flow. Second operand has 14 states, 14 states have (on average 194.71428571428572) internal successors, (2726), 14 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:22,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:22,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:54:22,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:25,186 INFO L130 PetriNetUnfolder]: 4903/9459 cut-off events. [2023-08-30 18:54:25,186 INFO L131 PetriNetUnfolder]: For 243593/243593 co-relation queries the response was YES. [2023-08-30 18:54:25,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84275 conditions, 9459 events. 4903/9459 cut-off events. For 243593/243593 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 77536 event pairs, 1806 based on Foata normal form. 20/9479 useless extension candidates. Maximal degree in co-relation 84189. Up to 8073 conditions per place. [2023-08-30 18:54:25,269 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 448 selfloop transitions, 87 changer transitions 5/540 dead transitions. [2023-08-30 18:54:25,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 540 transitions, 13299 flow [2023-08-30 18:54:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:54:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:54:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1597 transitions. [2023-08-30 18:54:25,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133022774327122 [2023-08-30 18:54:25,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1597 transitions. [2023-08-30 18:54:25,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1597 transitions. [2023-08-30 18:54:25,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:25,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1597 transitions. [2023-08-30 18:54:25,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.625) internal successors, (1597), 8 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:25,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:25,275 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:25,275 INFO L175 Difference]: Start difference. First operand has 261 places, 526 transitions, 12123 flow. Second operand 8 states and 1597 transitions. [2023-08-30 18:54:25,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 540 transitions, 13299 flow [2023-08-30 18:54:26,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 540 transitions, 13083 flow, removed 19 selfloop flow, removed 14 redundant places. [2023-08-30 18:54:26,986 INFO L231 Difference]: Finished difference. Result has 254 places, 518 transitions, 12006 flow [2023-08-30 18:54:26,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12006, PETRI_PLACES=254, PETRI_TRANSITIONS=518} [2023-08-30 18:54:26,986 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 229 predicate places. [2023-08-30 18:54:26,986 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 518 transitions, 12006 flow [2023-08-30 18:54:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 194.71428571428572) internal successors, (2726), 14 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:26,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:26,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:26,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 18:54:27,188 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:27,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2109707449, now seen corresponding path program 2 times [2023-08-30 18:54:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137949537] [2023-08-30 18:54:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:27,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:54:27,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137949537] [2023-08-30 18:54:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137949537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445967026] [2023-08-30 18:54:27,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:54:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:27,352 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:54:27,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 18:54:27,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:54:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 18:54:27,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:27,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:27,762 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 160 treesize of output 141 [2023-08-30 18:54:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:54:27,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:28,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:28,081 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 185 treesize of output 165 [2023-08-30 18:54:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:54:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445967026] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:28,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-30 18:54:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617253488] [2023-08-30 18:54:28,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:54:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:54:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:54:29,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 483 [2023-08-30 18:54:29,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 518 transitions, 12006 flow. Second operand has 27 states, 27 states have (on average 183.0) internal successors, (4941), 27 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:29,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:29,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 483 [2023-08-30 18:54:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:33,329 INFO L130 PetriNetUnfolder]: 5270/10157 cut-off events. [2023-08-30 18:54:33,329 INFO L131 PetriNetUnfolder]: For 266895/266895 co-relation queries the response was YES. [2023-08-30 18:54:33,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90161 conditions, 10157 events. 5270/10157 cut-off events. For 266895/266895 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 84445 event pairs, 951 based on Foata normal form. 160/10317 useless extension candidates. Maximal degree in co-relation 90078. Up to 3198 conditions per place. [2023-08-30 18:54:33,414 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 647 selfloop transitions, 625 changer transitions 69/1341 dead transitions. [2023-08-30 18:54:33,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1341 transitions, 31087 flow [2023-08-30 18:54:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 18:54:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 18:54:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 8435 transitions. [2023-08-30 18:54:33,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38808373590982287 [2023-08-30 18:54:33,420 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 8435 transitions. [2023-08-30 18:54:33,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 8435 transitions. [2023-08-30 18:54:33,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:33,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 8435 transitions. [2023-08-30 18:54:33,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 187.44444444444446) internal successors, (8435), 45 states have internal predecessors, (8435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 483.0) internal successors, (22218), 46 states have internal predecessors, (22218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,441 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 483.0) internal successors, (22218), 46 states have internal predecessors, (22218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,442 INFO L175 Difference]: Start difference. First operand has 254 places, 518 transitions, 12006 flow. Second operand 45 states and 8435 transitions. [2023-08-30 18:54:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1341 transitions, 31087 flow [2023-08-30 18:54:35,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1341 transitions, 30709 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 18:54:35,472 INFO L231 Difference]: Finished difference. Result has 311 places, 881 transitions, 22917 flow [2023-08-30 18:54:35,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11814, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=22917, PETRI_PLACES=311, PETRI_TRANSITIONS=881} [2023-08-30 18:54:35,473 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 286 predicate places. [2023-08-30 18:54:35,473 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 881 transitions, 22917 flow [2023-08-30 18:54:35,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 183.0) internal successors, (4941), 27 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:35,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:35,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:35,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:35,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:35,674 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:35,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1768613792, now seen corresponding path program 10 times [2023-08-30 18:54:35,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:35,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685319756] [2023-08-30 18:54:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:54:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685319756] [2023-08-30 18:54:36,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685319756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:54:36,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:54:36,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 18:54:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939814986] [2023-08-30 18:54:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:54:36,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:54:36,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:54:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:54:36,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 483 [2023-08-30 18:54:36,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 881 transitions, 22917 flow. Second operand has 11 states, 11 states have (on average 188.9090909090909) internal successors, (2078), 11 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:36,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:36,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 483 [2023-08-30 18:54:36,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:39,642 INFO L130 PetriNetUnfolder]: 4977/9639 cut-off events. [2023-08-30 18:54:39,642 INFO L131 PetriNetUnfolder]: For 294540/294540 co-relation queries the response was YES. [2023-08-30 18:54:39,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93729 conditions, 9639 events. 4977/9639 cut-off events. For 294540/294540 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 79902 event pairs, 1792 based on Foata normal form. 30/9669 useless extension candidates. Maximal degree in co-relation 93626. Up to 8431 conditions per place. [2023-08-30 18:54:39,771 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 768 selfloop transitions, 126 changer transitions 20/914 dead transitions. [2023-08-30 18:54:39,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 914 transitions, 25166 flow [2023-08-30 18:54:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:54:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:54:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1930 transitions. [2023-08-30 18:54:39,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995859213250518 [2023-08-30 18:54:39,773 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1930 transitions. [2023-08-30 18:54:39,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1930 transitions. [2023-08-30 18:54:39,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:39,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1930 transitions. [2023-08-30 18:54:39,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:39,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:39,777 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:39,777 INFO L175 Difference]: Start difference. First operand has 311 places, 881 transitions, 22917 flow. Second operand 10 states and 1930 transitions. [2023-08-30 18:54:39,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 914 transitions, 25166 flow [2023-08-30 18:54:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 914 transitions, 24267 flow, removed 436 selfloop flow, removed 10 redundant places. [2023-08-30 18:54:42,553 INFO L231 Difference]: Finished difference. Result has 307 places, 874 transitions, 22163 flow [2023-08-30 18:54:42,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=22063, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22163, PETRI_PLACES=307, PETRI_TRANSITIONS=874} [2023-08-30 18:54:42,554 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2023-08-30 18:54:42,554 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 874 transitions, 22163 flow [2023-08-30 18:54:42,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 188.9090909090909) internal successors, (2078), 11 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:42,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:42,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-30 18:54:42,555 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:42,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2075885073, now seen corresponding path program 3 times [2023-08-30 18:54:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006035328] [2023-08-30 18:54:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:54:42,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006035328] [2023-08-30 18:54:42,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006035328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039888880] [2023-08-30 18:54:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:54:42,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:42,740 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:54:42,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 18:54:42,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:54:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 18:54:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:54:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:43,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:43,238 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 185 treesize of output 165 [2023-08-30 18:54:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:54:43,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039888880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:43,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:43,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-30 18:54:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634999631] [2023-08-30 18:54:43,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:54:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:54:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-08-30 18:54:44,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 18:54:44,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 874 transitions, 22163 flow. Second operand has 29 states, 29 states have (on average 186.86206896551724) internal successors, (5419), 29 states have internal predecessors, (5419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:44,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:44,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 18:54:44,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:48,319 INFO L130 PetriNetUnfolder]: 5062/9802 cut-off events. [2023-08-30 18:54:48,319 INFO L131 PetriNetUnfolder]: For 288953/288953 co-relation queries the response was YES. [2023-08-30 18:54:48,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93164 conditions, 9802 events. 5062/9802 cut-off events. For 288953/288953 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 81199 event pairs, 1842 based on Foata normal form. 90/9892 useless extension candidates. Maximal degree in co-relation 93063. Up to 5613 conditions per place. [2023-08-30 18:54:48,423 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 1049 selfloop transitions, 139 changer transitions 20/1208 dead transitions. [2023-08-30 18:54:48,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1208 transitions, 30091 flow [2023-08-30 18:54:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:54:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:54:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3097 transitions. [2023-08-30 18:54:48,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007505175983437 [2023-08-30 18:54:48,425 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3097 transitions. [2023-08-30 18:54:48,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3097 transitions. [2023-08-30 18:54:48,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:48,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3097 transitions. [2023-08-30 18:54:48,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 193.5625) internal successors, (3097), 16 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:48,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:48,431 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:48,431 INFO L175 Difference]: Start difference. First operand has 307 places, 874 transitions, 22163 flow. Second operand 16 states and 3097 transitions. [2023-08-30 18:54:48,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1208 transitions, 30091 flow [2023-08-30 18:54:51,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1208 transitions, 29225 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-08-30 18:54:51,119 INFO L231 Difference]: Finished difference. Result has 307 places, 912 transitions, 22815 flow [2023-08-30 18:54:51,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=21377, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22815, PETRI_PLACES=307, PETRI_TRANSITIONS=912} [2023-08-30 18:54:51,120 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2023-08-30 18:54:51,120 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 912 transitions, 22815 flow [2023-08-30 18:54:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 186.86206896551724) internal successors, (5419), 29 states have internal predecessors, (5419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:51,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:51,327 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:51,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1698496599, now seen corresponding path program 4 times [2023-08-30 18:54:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674453179] [2023-08-30 18:54:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:54:51,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674453179] [2023-08-30 18:54:51,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674453179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109585556] [2023-08-30 18:54:51,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:54:51,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:51,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:51,529 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:54:51,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 18:54:51,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:54:51,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 18:54:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:54:51,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:52,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:52,035 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 185 treesize of output 165 [2023-08-30 18:54:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:54:52,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109585556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:52,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:52,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 18:54:52,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691155290] [2023-08-30 18:54:52,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:52,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:54:52,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:54:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:54:53,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 18:54:53,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 912 transitions, 22815 flow. Second operand has 25 states, 25 states have (on average 186.96) internal successors, (4674), 25 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:53,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:53,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 18:54:53,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:56,728 INFO L130 PetriNetUnfolder]: 4886/9586 cut-off events. [2023-08-30 18:54:56,729 INFO L131 PetriNetUnfolder]: For 293193/293193 co-relation queries the response was YES. [2023-08-30 18:54:56,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91921 conditions, 9586 events. 4886/9586 cut-off events. For 293193/293193 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 80486 event pairs, 1488 based on Foata normal form. 144/9730 useless extension candidates. Maximal degree in co-relation 91821. Up to 4124 conditions per place. [2023-08-30 18:54:56,828 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 1046 selfloop transitions, 132 changer transitions 19/1197 dead transitions. [2023-08-30 18:54:56,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1197 transitions, 30019 flow [2023-08-30 18:54:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:54:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:54:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2331 transitions. [2023-08-30 18:54:56,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40217391304347827 [2023-08-30 18:54:56,830 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2331 transitions. [2023-08-30 18:54:56,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2331 transitions. [2023-08-30 18:54:56,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:56,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2331 transitions. [2023-08-30 18:54:56,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 194.25) internal successors, (2331), 12 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:56,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:56,835 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:56,835 INFO L175 Difference]: Start difference. First operand has 307 places, 912 transitions, 22815 flow. Second operand 12 states and 2331 transitions. [2023-08-30 18:54:56,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1197 transitions, 30019 flow [2023-08-30 18:54:59,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1197 transitions, 29818 flow, removed 91 selfloop flow, removed 7 redundant places. [2023-08-30 18:54:59,999 INFO L231 Difference]: Finished difference. Result has 316 places, 938 transitions, 23782 flow [2023-08-30 18:55:00,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=22584, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23782, PETRI_PLACES=316, PETRI_TRANSITIONS=938} [2023-08-30 18:55:00,000 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 291 predicate places. [2023-08-30 18:55:00,000 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 938 transitions, 23782 flow [2023-08-30 18:55:00,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 186.96) internal successors, (4674), 25 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:00,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:00,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:00,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:00,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 18:55:00,201 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:00,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:00,202 INFO L85 PathProgramCache]: Analyzing trace with hash 950430547, now seen corresponding path program 5 times [2023-08-30 18:55:00,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:00,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053548561] [2023-08-30 18:55:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:00,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:55:00,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:00,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053548561] [2023-08-30 18:55:00,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053548561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:00,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850391220] [2023-08-30 18:55:00,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:55:00,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:00,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:00,397 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:55:00,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 18:55:00,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:55:00,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 18:55:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:55:00,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:00,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:00,956 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 185 treesize of output 165 [2023-08-30 18:55:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:55:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850391220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:01,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:01,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-08-30 18:55:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954418649] [2023-08-30 18:55:01,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:01,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:55:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:55:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-08-30 18:55:02,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 18:55:02,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 938 transitions, 23782 flow. Second operand has 26 states, 26 states have (on average 186.69230769230768) internal successors, (4854), 26 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:02,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:02,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 18:55:02,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:05,688 INFO L130 PetriNetUnfolder]: 4729/9325 cut-off events. [2023-08-30 18:55:05,688 INFO L131 PetriNetUnfolder]: For 290224/290224 co-relation queries the response was YES. [2023-08-30 18:55:05,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90586 conditions, 9325 events. 4729/9325 cut-off events. For 290224/290224 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 78230 event pairs, 1757 based on Foata normal form. 62/9387 useless extension candidates. Maximal degree in co-relation 90482. Up to 5425 conditions per place. [2023-08-30 18:55:05,787 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 982 selfloop transitions, 132 changer transitions 17/1131 dead transitions. [2023-08-30 18:55:05,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1131 transitions, 28912 flow [2023-08-30 18:55:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:55:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:55:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2701 transitions. [2023-08-30 18:55:05,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994380360839988 [2023-08-30 18:55:05,790 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2701 transitions. [2023-08-30 18:55:05,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2701 transitions. [2023-08-30 18:55:05,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:05,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2701 transitions. [2023-08-30 18:55:05,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 192.92857142857142) internal successors, (2701), 14 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:05,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:05,794 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:05,794 INFO L175 Difference]: Start difference. First operand has 316 places, 938 transitions, 23782 flow. Second operand 14 states and 2701 transitions. [2023-08-30 18:55:05,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1131 transitions, 28912 flow [2023-08-30 18:55:09,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1131 transitions, 28789 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-08-30 18:55:09,155 INFO L231 Difference]: Finished difference. Result has 324 places, 934 transitions, 23993 flow [2023-08-30 18:55:09,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23620, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23993, PETRI_PLACES=324, PETRI_TRANSITIONS=934} [2023-08-30 18:55:09,156 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 299 predicate places. [2023-08-30 18:55:09,156 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 934 transitions, 23993 flow [2023-08-30 18:55:09,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 186.69230769230768) internal successors, (4854), 26 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:09,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:09,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:09,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:09,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:09,359 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:09,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1122305270, now seen corresponding path program 11 times [2023-08-30 18:55:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184426044] [2023-08-30 18:55:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:55:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184426044] [2023-08-30 18:55:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184426044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:55:09,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:55:09,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 18:55:09,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009314523] [2023-08-30 18:55:09,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:55:09,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:55:09,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:09,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:55:09,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:55:09,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-08-30 18:55:09,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 934 transitions, 23993 flow. Second operand has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:09,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:09,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-08-30 18:55:09,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:13,080 INFO L130 PetriNetUnfolder]: 4650/9161 cut-off events. [2023-08-30 18:55:13,080 INFO L131 PetriNetUnfolder]: For 281924/281924 co-relation queries the response was YES. [2023-08-30 18:55:13,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88553 conditions, 9161 events. 4650/9161 cut-off events. For 281924/281924 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 76691 event pairs, 1779 based on Foata normal form. 30/9191 useless extension candidates. Maximal degree in co-relation 88448. Up to 8294 conditions per place. [2023-08-30 18:55:13,166 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 771 selfloop transitions, 157 changer transitions 11/939 dead transitions. [2023-08-30 18:55:13,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 939 transitions, 25784 flow [2023-08-30 18:55:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:55:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:55:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1749 transitions. [2023-08-30 18:55:13,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023464458247067 [2023-08-30 18:55:13,168 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1749 transitions. [2023-08-30 18:55:13,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1749 transitions. [2023-08-30 18:55:13,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:13,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1749 transitions. [2023-08-30 18:55:13,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:13,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:13,171 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:13,171 INFO L175 Difference]: Start difference. First operand has 324 places, 934 transitions, 23993 flow. Second operand 9 states and 1749 transitions. [2023-08-30 18:55:13,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 939 transitions, 25784 flow [2023-08-30 18:55:15,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 939 transitions, 25747 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 18:55:15,737 INFO L231 Difference]: Finished difference. Result has 324 places, 912 transitions, 23837 flow [2023-08-30 18:55:15,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23634, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23837, PETRI_PLACES=324, PETRI_TRANSITIONS=912} [2023-08-30 18:55:15,737 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 299 predicate places. [2023-08-30 18:55:15,738 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 912 transitions, 23837 flow [2023-08-30 18:55:15,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:15,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:15,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-30 18:55:15,738 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:15,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash -858824887, now seen corresponding path program 6 times [2023-08-30 18:55:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:15,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178754495] [2023-08-30 18:55:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:55:15,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:15,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178754495] [2023-08-30 18:55:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178754495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22561470] [2023-08-30 18:55:15,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:55:15,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:15,863 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:55:15,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 18:55:16,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 18:55:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 18:55:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:55:16,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:55:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22561470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:16,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 18:55:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115444462] [2023-08-30 18:55:16,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:16,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:55:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:55:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:55:16,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-08-30 18:55:16,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 912 transitions, 23837 flow. Second operand has 22 states, 22 states have (on average 192.86363636363637) internal successors, (4243), 22 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:16,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:16,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-08-30 18:55:16,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:20,091 INFO L130 PetriNetUnfolder]: 4617/9057 cut-off events. [2023-08-30 18:55:20,091 INFO L131 PetriNetUnfolder]: For 284913/284913 co-relation queries the response was YES. [2023-08-30 18:55:20,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88462 conditions, 9057 events. 4617/9057 cut-off events. For 284913/284913 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 74981 event pairs, 935 based on Foata normal form. 13/9070 useless extension candidates. Maximal degree in co-relation 88357. Up to 3298 conditions per place. [2023-08-30 18:55:20,191 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 904 selfloop transitions, 192 changer transitions 14/1110 dead transitions. [2023-08-30 18:55:20,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1110 transitions, 29337 flow [2023-08-30 18:55:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:55:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:55:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2793 transitions. [2023-08-30 18:55:20,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-08-30 18:55:20,194 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2793 transitions. [2023-08-30 18:55:20,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2793 transitions. [2023-08-30 18:55:20,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:20,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2793 transitions. [2023-08-30 18:55:20,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.5) internal successors, (2793), 14 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:20,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:20,198 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:20,198 INFO L175 Difference]: Start difference. First operand has 324 places, 912 transitions, 23837 flow. Second operand 14 states and 2793 transitions. [2023-08-30 18:55:20,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1110 transitions, 29337 flow [2023-08-30 18:55:22,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1110 transitions, 28782 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-30 18:55:22,619 INFO L231 Difference]: Finished difference. Result has 317 places, 913 transitions, 23823 flow [2023-08-30 18:55:22,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23301, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23823, PETRI_PLACES=317, PETRI_TRANSITIONS=913} [2023-08-30 18:55:22,621 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 292 predicate places. [2023-08-30 18:55:22,621 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 913 transitions, 23823 flow [2023-08-30 18:55:22,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 192.86363636363637) internal successors, (4243), 22 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:22,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:22,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:22,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:22,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 18:55:22,831 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:22,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:22,831 INFO L85 PathProgramCache]: Analyzing trace with hash -921077659, now seen corresponding path program 1 times [2023-08-30 18:55:22,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:22,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619686276] [2023-08-30 18:55:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:22,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:55:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619686276] [2023-08-30 18:55:22,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619686276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335966403] [2023-08-30 18:55:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:22,896 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:55:22,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 18:55:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:55:23,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:55:23,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:55:23,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335966403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:23,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:23,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-30 18:55:23,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564442031] [2023-08-30 18:55:23,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:23,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:55:23,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:23,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:55:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-30 18:55:23,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 18:55:23,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 913 transitions, 23823 flow. Second operand has 16 states, 16 states have (on average 195.1875) internal successors, (3123), 16 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:23,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:23,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 18:55:23,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:24,990 INFO L130 PetriNetUnfolder]: 1707/3387 cut-off events. [2023-08-30 18:55:24,990 INFO L131 PetriNetUnfolder]: For 122695/122695 co-relation queries the response was YES. [2023-08-30 18:55:25,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35548 conditions, 3387 events. 1707/3387 cut-off events. For 122695/122695 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23374 event pairs, 502 based on Foata normal form. 126/3513 useless extension candidates. Maximal degree in co-relation 35443. Up to 1911 conditions per place. [2023-08-30 18:55:25,023 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 317 selfloop transitions, 6 changer transitions 261/584 dead transitions. [2023-08-30 18:55:25,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 584 transitions, 15219 flow [2023-08-30 18:55:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:55:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:55:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3379 transitions. [2023-08-30 18:55:25,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115211301912069 [2023-08-30 18:55:25,025 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3379 transitions. [2023-08-30 18:55:25,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3379 transitions. [2023-08-30 18:55:25,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:25,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3379 transitions. [2023-08-30 18:55:25,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 198.76470588235293) internal successors, (3379), 17 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:25,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 483.0) internal successors, (8694), 18 states have internal predecessors, (8694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:25,031 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 483.0) internal successors, (8694), 18 states have internal predecessors, (8694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:25,031 INFO L175 Difference]: Start difference. First operand has 317 places, 913 transitions, 23823 flow. Second operand 17 states and 3379 transitions. [2023-08-30 18:55:25,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 584 transitions, 15219 flow [2023-08-30 18:55:25,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 584 transitions, 14462 flow, removed 77 selfloop flow, removed 21 redundant places. [2023-08-30 18:55:25,671 INFO L231 Difference]: Finished difference. Result has 310 places, 323 transitions, 6985 flow [2023-08-30 18:55:25,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11784, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6985, PETRI_PLACES=310, PETRI_TRANSITIONS=323} [2023-08-30 18:55:25,672 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2023-08-30 18:55:25,672 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 323 transitions, 6985 flow [2023-08-30 18:55:25,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 195.1875) internal successors, (3123), 16 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:25,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:25,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:25,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:25,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:25,879 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:25,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1369840006, now seen corresponding path program 7 times [2023-08-30 18:55:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:25,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161094490] [2023-08-30 18:55:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:26,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161094490] [2023-08-30 18:55:26,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161094490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217757467] [2023-08-30 18:55:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:55:26,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:26,481 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:55:26,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 18:55:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:55:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:26,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:27,194 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:27,194 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 20 treesize of output 4 [2023-08-30 18:55:27,230 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 18:55:27,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-08-30 18:55:27,248 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:27,248 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 16 treesize of output 4 [2023-08-30 18:55:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217757467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:27,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:27,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-08-30 18:55:27,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027316134] [2023-08-30 18:55:27,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:27,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 18:55:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 18:55:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 18:55:30,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-08-30 18:55:30,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 323 transitions, 6985 flow. Second operand has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:30,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:30,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-08-30 18:55:30,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:33,232 INFO L130 PetriNetUnfolder]: 2935/5183 cut-off events. [2023-08-30 18:55:33,232 INFO L131 PetriNetUnfolder]: For 161325/161325 co-relation queries the response was YES. [2023-08-30 18:55:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51123 conditions, 5183 events. 2935/5183 cut-off events. For 161325/161325 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34504 event pairs, 296 based on Foata normal form. 136/5319 useless extension candidates. Maximal degree in co-relation 51024. Up to 1637 conditions per place. [2023-08-30 18:55:33,280 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 652 selfloop transitions, 279 changer transitions 0/931 dead transitions. [2023-08-30 18:55:33,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 931 transitions, 20925 flow [2023-08-30 18:55:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:55:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:55:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4564 transitions. [2023-08-30 18:55:33,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779710144927536 [2023-08-30 18:55:33,283 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4564 transitions. [2023-08-30 18:55:33,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4564 transitions. [2023-08-30 18:55:33,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:33,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4564 transitions. [2023-08-30 18:55:33,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 182.56) internal successors, (4564), 25 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 483.0) internal successors, (12558), 26 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,290 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 483.0) internal successors, (12558), 26 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,290 INFO L175 Difference]: Start difference. First operand has 310 places, 323 transitions, 6985 flow. Second operand 25 states and 4564 transitions. [2023-08-30 18:55:33,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 931 transitions, 20925 flow [2023-08-30 18:55:33,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 931 transitions, 19688 flow, removed 416 selfloop flow, removed 46 redundant places. [2023-08-30 18:55:33,959 INFO L231 Difference]: Finished difference. Result has 241 places, 501 transitions, 11468 flow [2023-08-30 18:55:33,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11468, PETRI_PLACES=241, PETRI_TRANSITIONS=501} [2023-08-30 18:55:33,960 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 216 predicate places. [2023-08-30 18:55:33,960 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 501 transitions, 11468 flow [2023-08-30 18:55:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:33,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:33,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 18:55:34,167 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:34,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash 10466820, now seen corresponding path program 8 times [2023-08-30 18:55:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150151351] [2023-08-30 18:55:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:34,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:34,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150151351] [2023-08-30 18:55:34,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150151351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:34,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753110527] [2023-08-30 18:55:34,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:55:34,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:34,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:34,657 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:55:34,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 18:55:34,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:55:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 18:55:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:35,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:35,478 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:35,478 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 20 treesize of output 4 [2023-08-30 18:55:35,522 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 18:55:35,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-08-30 18:55:35,546 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:35,547 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 16 treesize of output 4 [2023-08-30 18:55:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753110527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:35,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:35,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-08-30 18:55:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512013885] [2023-08-30 18:55:35,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:35,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 18:55:35,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:35,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 18:55:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 18:55:39,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-08-30 18:55:39,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 501 transitions, 11468 flow. Second operand has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:39,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:39,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-08-30 18:55:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:42,044 INFO L130 PetriNetUnfolder]: 3063/5419 cut-off events. [2023-08-30 18:55:42,044 INFO L131 PetriNetUnfolder]: For 126918/126918 co-relation queries the response was YES. [2023-08-30 18:55:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50204 conditions, 5419 events. 3063/5419 cut-off events. For 126918/126918 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36548 event pairs, 457 based on Foata normal form. 52/5471 useless extension candidates. Maximal degree in co-relation 50126. Up to 1677 conditions per place. [2023-08-30 18:55:42,102 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 541 selfloop transitions, 397 changer transitions 0/938 dead transitions. [2023-08-30 18:55:42,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 938 transitions, 21845 flow [2023-08-30 18:55:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 18:55:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 18:55:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6313 transitions. [2023-08-30 18:55:42,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734398107068915 [2023-08-30 18:55:42,106 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6313 transitions. [2023-08-30 18:55:42,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6313 transitions. [2023-08-30 18:55:42,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:42,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6313 transitions. [2023-08-30 18:55:42,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 180.37142857142857) internal successors, (6313), 35 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 483.0) internal successors, (17388), 36 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,117 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 483.0) internal successors, (17388), 36 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,117 INFO L175 Difference]: Start difference. First operand has 241 places, 501 transitions, 11468 flow. Second operand 35 states and 6313 transitions. [2023-08-30 18:55:42,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 938 transitions, 21845 flow [2023-08-30 18:55:42,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 938 transitions, 21685 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-08-30 18:55:42,808 INFO L231 Difference]: Finished difference. Result has 282 places, 659 transitions, 15971 flow [2023-08-30 18:55:42,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11376, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15971, PETRI_PLACES=282, PETRI_TRANSITIONS=659} [2023-08-30 18:55:42,809 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2023-08-30 18:55:42,809 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 659 transitions, 15971 flow [2023-08-30 18:55:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:42,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:42,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:43,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 18:55:43,016 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:43,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash -779428774, now seen corresponding path program 9 times [2023-08-30 18:55:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:43,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465265225] [2023-08-30 18:55:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:43,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465265225] [2023-08-30 18:55:43,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465265225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455849985] [2023-08-30 18:55:43,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:55:43,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:43,541 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:55:43,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 18:55:43,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:55:43,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:43,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 18:55:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:43,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:55:43,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:55:43,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:55:44,428 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-08-30 18:55:44,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 154 [2023-08-30 18:55:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:44,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:45,559 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (+ c_~a1~0.offset 4)) (.cse7 (+ 4 c_~a2~0.offset))) (let ((.cse0 (forall ((~a1~0.base Int) (v_ArrVal_2194 (Array Int Int))) (not (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2194))) (= (select (select .cse9 ~a1~0.base) .cse6) (select (select .cse9 c_~a2~0.base) .cse7))))))) (and (or (<= c_~n2~0 c_~n1~0) .cse0) (or (<= c_~n1~0 c_~n2~0) .cse0) (forall ((~a1~0.base Int) (v_ArrVal_2194 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2194))) (let ((.cse3 (select .cse8 ~a1~0.base)) (.cse5 (select .cse8 c_~a2~0.base))) (or (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_148| Int)) (let ((.cse4 (* |v_thread2Thread1of1ForFork1_~i~1#1_148| 4))) (let ((.cse2 (select .cse5 (+ .cse4 c_~a2~0.offset))) (.cse1 (select .cse3 (+ .cse4 c_~a1~0.offset)))) (or (= .cse1 .cse2) (<= c_~n1~0 |v_thread2Thread1of1ForFork1_~i~1#1_148|) (< (+ 2147483647 .cse1) .cse2) (<= c_~n2~0 |v_thread2Thread1of1ForFork1_~i~1#1_148|) (< |v_thread2Thread1of1ForFork1_~i~1#1_148| 1) (< (+ 2147483648 .cse2) .cse1))))) (not (= (select .cse3 .cse6) (select .cse5 .cse7)))))))))) is different from false [2023-08-30 18:55:45,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:45,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 138 [2023-08-30 18:55:45,841 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 18:55:45,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1638 treesize of output 1442 [2023-08-30 18:55:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:55:45,868 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:55:45,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:45,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1398 treesize of output 1090 [2023-08-30 18:55:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:55:45,921 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:55:45,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:45,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1046 treesize of output 914 [2023-08-30 18:55:48,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:48,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-08-30 18:55:48,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:48,914 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 726 treesize of output 642 [2023-08-30 18:55:48,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:48,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 255 [2023-08-30 18:55:48,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:48,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-08-30 18:55:49,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:49,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-08-30 18:55:49,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:49,070 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 726 treesize of output 642 [2023-08-30 18:55:49,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:49,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 255 [2023-08-30 18:55:49,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:49,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-08-30 18:55:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:55:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455849985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:49,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:49,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 43 [2023-08-30 18:55:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018671777] [2023-08-30 18:55:49,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:49,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 18:55:49,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 18:55:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1599, Unknown=2, NotChecked=82, Total=1892 [2023-08-30 18:55:49,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 483 [2023-08-30 18:55:49,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 659 transitions, 15971 flow. Second operand has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:49,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:49,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 483 [2023-08-30 18:55:49,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:52,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:56:03,247 INFO L130 PetriNetUnfolder]: 5545/9772 cut-off events. [2023-08-30 18:56:03,248 INFO L131 PetriNetUnfolder]: For 276771/276771 co-relation queries the response was YES. [2023-08-30 18:56:03,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95920 conditions, 9772 events. 5545/9772 cut-off events. For 276771/276771 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 73025 event pairs, 576 based on Foata normal form. 161/9933 useless extension candidates. Maximal degree in co-relation 95829. Up to 2909 conditions per place. [2023-08-30 18:56:03,349 INFO L137 encePairwiseOnDemand]: 466/483 looper letters, 862 selfloop transitions, 734 changer transitions 76/1672 dead transitions. [2023-08-30 18:56:03,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1672 transitions, 40351 flow [2023-08-30 18:56:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-30 18:56:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-30 18:56:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 8933 transitions. [2023-08-30 18:56:03,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802246063115628 [2023-08-30 18:56:03,355 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 8933 transitions. [2023-08-30 18:56:03,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 8933 transitions. [2023-08-30 18:56:03,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:03,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 8933 transitions. [2023-08-30 18:56:03,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 135.34848484848484) internal successors, (8933), 66 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:03,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 483.0) internal successors, (32361), 67 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:03,374 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 483.0) internal successors, (32361), 67 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:03,374 INFO L175 Difference]: Start difference. First operand has 282 places, 659 transitions, 15971 flow. Second operand 66 states and 8933 transitions. [2023-08-30 18:56:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1672 transitions, 40351 flow [2023-08-30 18:56:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1672 transitions, 39576 flow, removed 223 selfloop flow, removed 15 redundant places. [2023-08-30 18:56:06,179 INFO L231 Difference]: Finished difference. Result has 359 places, 1119 transitions, 28193 flow [2023-08-30 18:56:06,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=15461, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=28193, PETRI_PLACES=359, PETRI_TRANSITIONS=1119} [2023-08-30 18:56:06,179 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 334 predicate places. [2023-08-30 18:56:06,180 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1119 transitions, 28193 flow [2023-08-30 18:56:06,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:06,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:06,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:06,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:06,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:06,381 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:06,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 875882456, now seen corresponding path program 10 times [2023-08-30 18:56:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570374586] [2023-08-30 18:56:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:06,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:56:06,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:06,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570374586] [2023-08-30 18:56:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570374586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:06,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967861063] [2023-08-30 18:56:06,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:56:06,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:06,959 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:56:06,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 18:56:07,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:56:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:56:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:56:07,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:07,746 INFO L321 Elim1Store]: treesize reduction 13, result has 93.4 percent of original size [2023-08-30 18:56:07,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 218 [2023-08-30 18:56:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:56:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967861063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:08,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:08,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-08-30 18:56:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251928404] [2023-08-30 18:56:08,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:08,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:56:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:56:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:56:11,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 483 [2023-08-30 18:56:11,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1119 transitions, 28193 flow. Second operand has 31 states, 31 states have (on average 177.90322580645162) internal successors, (5515), 31 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:11,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:11,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 483 [2023-08-30 18:56:11,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:15,235 INFO L130 PetriNetUnfolder]: 5222/9254 cut-off events. [2023-08-30 18:56:15,236 INFO L131 PetriNetUnfolder]: For 394010/394010 co-relation queries the response was YES. [2023-08-30 18:56:15,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102732 conditions, 9254 events. 5222/9254 cut-off events. For 394010/394010 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 69053 event pairs, 1247 based on Foata normal form. 116/9370 useless extension candidates. Maximal degree in co-relation 102614. Up to 5923 conditions per place. [2023-08-30 18:56:15,355 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 779 selfloop transitions, 402 changer transitions 5/1186 dead transitions. [2023-08-30 18:56:15,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1186 transitions, 31900 flow [2023-08-30 18:56:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:56:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:56:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2721 transitions. [2023-08-30 18:56:15,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755693581780538 [2023-08-30 18:56:15,357 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2721 transitions. [2023-08-30 18:56:15,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2721 transitions. [2023-08-30 18:56:15,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:15,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2721 transitions. [2023-08-30 18:56:15,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 181.4) internal successors, (2721), 15 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,362 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,362 INFO L175 Difference]: Start difference. First operand has 359 places, 1119 transitions, 28193 flow. Second operand 15 states and 2721 transitions. [2023-08-30 18:56:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1186 transitions, 31900 flow [2023-08-30 18:56:19,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1186 transitions, 30966 flow, removed 388 selfloop flow, removed 18 redundant places. [2023-08-30 18:56:19,583 INFO L231 Difference]: Finished difference. Result has 349 places, 1120 transitions, 28256 flow [2023-08-30 18:56:19,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=27353, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28256, PETRI_PLACES=349, PETRI_TRANSITIONS=1120} [2023-08-30 18:56:19,584 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 324 predicate places. [2023-08-30 18:56:19,584 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1120 transitions, 28256 flow [2023-08-30 18:56:19,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 177.90322580645162) internal successors, (5515), 31 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:19,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:19,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:19,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-30 18:56:19,785 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:19,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash -357005494, now seen corresponding path program 11 times [2023-08-30 18:56:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:19,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898849508] [2023-08-30 18:56:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:56:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898849508] [2023-08-30 18:56:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898849508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356451861] [2023-08-30 18:56:20,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:56:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:20,442 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:56:20,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 18:56:20,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 18:56:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 18:56:20,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:56:21,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:21,492 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-08-30 18:56:21,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 193 [2023-08-30 18:56:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:56:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356451861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:22,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:22,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 27 [2023-08-30 18:56:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062728083] [2023-08-30 18:56:22,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:22,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:56:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:56:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:56:24,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-08-30 18:56:24,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1120 transitions, 28256 flow. Second operand has 27 states, 27 states have (on average 177.0) internal successors, (4779), 27 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:24,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:24,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-08-30 18:56:24,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:28,608 INFO L130 PetriNetUnfolder]: 5992/10828 cut-off events. [2023-08-30 18:56:28,609 INFO L131 PetriNetUnfolder]: For 433311/433311 co-relation queries the response was YES. [2023-08-30 18:56:28,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116377 conditions, 10828 events. 5992/10828 cut-off events. For 433311/433311 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 83873 event pairs, 1261 based on Foata normal form. 288/11116 useless extension candidates. Maximal degree in co-relation 116265. Up to 6416 conditions per place. [2023-08-30 18:56:28,747 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 999 selfloop transitions, 388 changer transitions 0/1387 dead transitions. [2023-08-30 18:56:28,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1387 transitions, 36552 flow [2023-08-30 18:56:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 18:56:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 18:56:28,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3268 transitions. [2023-08-30 18:56:28,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37589141936968024 [2023-08-30 18:56:28,750 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3268 transitions. [2023-08-30 18:56:28,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3268 transitions. [2023-08-30 18:56:28,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:28,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3268 transitions. [2023-08-30 18:56:28,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.55555555555554) internal successors, (3268), 18 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:28,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 483.0) internal successors, (9177), 19 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:28,755 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 483.0) internal successors, (9177), 19 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:28,755 INFO L175 Difference]: Start difference. First operand has 349 places, 1120 transitions, 28256 flow. Second operand 18 states and 3268 transitions. [2023-08-30 18:56:28,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1387 transitions, 36552 flow [2023-08-30 18:56:33,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1387 transitions, 35405 flow, removed 33 selfloop flow, removed 11 redundant places. [2023-08-30 18:56:33,312 INFO L231 Difference]: Finished difference. Result has 363 places, 1225 transitions, 31287 flow [2023-08-30 18:56:33,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=27272, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=31287, PETRI_PLACES=363, PETRI_TRANSITIONS=1225} [2023-08-30 18:56:33,312 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 338 predicate places. [2023-08-30 18:56:33,312 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1225 transitions, 31287 flow [2023-08-30 18:56:33,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.0) internal successors, (4779), 27 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:33,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:33,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:33,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:33,514 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:33,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1857435442, now seen corresponding path program 12 times [2023-08-30 18:56:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:33,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665410895] [2023-08-30 18:56:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:56:34,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665410895] [2023-08-30 18:56:34,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665410895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:34,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468693861] [2023-08-30 18:56:34,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:56:34,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:34,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:34,077 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:56:34,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 18:56:34,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:56:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:34,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 18:56:34,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:56:34,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:35,207 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:56:35,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-08-30 18:56:35,261 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:56:35,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-08-30 18:56:35,284 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:56:35,284 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 20 treesize of output 4 [2023-08-30 18:56:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:56:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468693861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:35,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 32 [2023-08-30 18:56:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784643878] [2023-08-30 18:56:35,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:35,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:56:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:56:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2023-08-30 18:56:39,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 483 [2023-08-30 18:56:39,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1225 transitions, 31287 flow. Second operand has 32 states, 32 states have (on average 171.125) internal successors, (5476), 32 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:39,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:39,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 483 [2023-08-30 18:56:39,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:58,994 INFO L130 PetriNetUnfolder]: 11221/20173 cut-off events. [2023-08-30 18:56:58,994 INFO L131 PetriNetUnfolder]: For 906641/906641 co-relation queries the response was YES. [2023-08-30 18:56:59,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227912 conditions, 20173 events. 11221/20173 cut-off events. For 906641/906641 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 172157 event pairs, 416 based on Foata normal form. 414/20587 useless extension candidates. Maximal degree in co-relation 227792. Up to 5983 conditions per place. [2023-08-30 18:56:59,227 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 1458 selfloop transitions, 1576 changer transitions 71/3105 dead transitions. [2023-08-30 18:56:59,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 3105 transitions, 77912 flow [2023-08-30 18:56:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-08-30 18:56:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-08-30 18:56:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 20550 transitions. [2023-08-30 18:56:59,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36364601581992884 [2023-08-30 18:56:59,237 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 20550 transitions. [2023-08-30 18:56:59,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 20550 transitions. [2023-08-30 18:56:59,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:59,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 20550 transitions. [2023-08-30 18:56:59,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 175.64102564102564) internal successors, (20550), 117 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:59,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 483.0) internal successors, (56994), 118 states have internal predecessors, (56994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:59,279 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 483.0) internal successors, (56994), 118 states have internal predecessors, (56994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:59,279 INFO L175 Difference]: Start difference. First operand has 363 places, 1225 transitions, 31287 flow. Second operand 117 states and 20550 transitions. [2023-08-30 18:56:59,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 3105 transitions, 77912 flow [2023-08-30 18:57:08,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 3105 transitions, 76534 flow, removed 599 selfloop flow, removed 8 redundant places. [2023-08-30 18:57:08,796 INFO L231 Difference]: Finished difference. Result has 525 places, 2278 transitions, 61850 flow [2023-08-30 18:57:08,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=30542, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=61850, PETRI_PLACES=525, PETRI_TRANSITIONS=2278} [2023-08-30 18:57:08,797 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 500 predicate places. [2023-08-30 18:57:08,797 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 2278 transitions, 61850 flow [2023-08-30 18:57:08,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 171.125) internal successors, (5476), 32 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:08,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:08,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:08,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:08,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-30 18:57:08,999 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:08,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 561451278, now seen corresponding path program 13 times [2023-08-30 18:57:09,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:09,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666995154] [2023-08-30 18:57:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:57:09,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:09,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666995154] [2023-08-30 18:57:09,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666995154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:09,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966113663] [2023-08-30 18:57:09,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:57:09,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:09,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:09,501 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:09,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 18:57:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:57:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:57:10,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:10,277 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:10,278 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 20 treesize of output 4 [2023-08-30 18:57:10,316 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:57:10,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 70 [2023-08-30 18:57:10,333 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:10,333 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 20 treesize of output 4 [2023-08-30 18:57:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:57:10,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966113663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:10,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:10,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-08-30 18:57:10,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38755145] [2023-08-30 18:57:10,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:10,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 18:57:10,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 18:57:10,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 18:57:14,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-08-30 18:57:14,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 2278 transitions, 61850 flow. Second operand has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:14,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:14,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-08-30 18:57:14,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:27,079 INFO L130 PetriNetUnfolder]: 10832/19196 cut-off events. [2023-08-30 18:57:27,080 INFO L131 PetriNetUnfolder]: For 942771/942771 co-relation queries the response was YES. [2023-08-30 18:57:27,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236030 conditions, 19196 events. 10832/19196 cut-off events. For 942771/942771 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 159714 event pairs, 2346 based on Foata normal form. 36/19232 useless extension candidates. Maximal degree in co-relation 235856. Up to 12036 conditions per place. [2023-08-30 18:57:27,345 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 1368 selfloop transitions, 973 changer transitions 0/2341 dead transitions. [2023-08-30 18:57:27,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2341 transitions, 68122 flow [2023-08-30 18:57:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:57:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:57:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3596 transitions. [2023-08-30 18:57:27,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722567287784679 [2023-08-30 18:57:27,347 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3596 transitions. [2023-08-30 18:57:27,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3596 transitions. [2023-08-30 18:57:27,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:27,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3596 transitions. [2023-08-30 18:57:27,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 179.8) internal successors, (3596), 20 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:27,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 483.0) internal successors, (10143), 21 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:27,353 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 483.0) internal successors, (10143), 21 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:27,353 INFO L175 Difference]: Start difference. First operand has 525 places, 2278 transitions, 61850 flow. Second operand 20 states and 3596 transitions. [2023-08-30 18:57:27,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2341 transitions, 68122 flow [2023-08-30 18:57:45,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 2341 transitions, 59106 flow, removed 4371 selfloop flow, removed 17 redundant places. [2023-08-30 18:57:45,599 INFO L231 Difference]: Finished difference. Result has 528 places, 2291 transitions, 56385 flow [2023-08-30 18:57:45,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=53026, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=56385, PETRI_PLACES=528, PETRI_TRANSITIONS=2291} [2023-08-30 18:57:45,600 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 503 predicate places. [2023-08-30 18:57:45,600 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 2291 transitions, 56385 flow [2023-08-30 18:57:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:45,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:45,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:45,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:45,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:45,802 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:45,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1055073050, now seen corresponding path program 14 times [2023-08-30 18:57:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:45,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070806839] [2023-08-30 18:57:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:45,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:57:46,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:46,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070806839] [2023-08-30 18:57:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070806839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:46,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737612205] [2023-08-30 18:57:46,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:57:46,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:46,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:46,301 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:46,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 18:57:46,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:57:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 18:57:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:57:46,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:46,984 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:46,985 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 20 treesize of output 4 [2023-08-30 18:57:47,021 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:57:47,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 70 [2023-08-30 18:57:47,038 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:47,038 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 20 treesize of output 4 [2023-08-30 18:57:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:57:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737612205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:47,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-08-30 18:57:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101004909] [2023-08-30 18:57:47,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:47,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 18:57:47,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 18:57:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 18:57:50,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-08-30 18:57:50,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 2291 transitions, 56385 flow. Second operand has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:50,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:50,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-08-30 18:57:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:03,245 INFO L130 PetriNetUnfolder]: 11284/19982 cut-off events. [2023-08-30 18:58:03,245 INFO L131 PetriNetUnfolder]: For 534387/534387 co-relation queries the response was YES. [2023-08-30 18:58:03,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190817 conditions, 19982 events. 11284/19982 cut-off events. For 534387/534387 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 167361 event pairs, 1721 based on Foata normal form. 144/20126 useless extension candidates. Maximal degree in co-relation 190646. Up to 7944 conditions per place. [2023-08-30 18:58:03,511 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 1674 selfloop transitions, 820 changer transitions 2/2496 dead transitions. [2023-08-30 18:58:03,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2496 transitions, 64589 flow [2023-08-30 18:58:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 18:58:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 18:58:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5075 transitions. [2023-08-30 18:58:03,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752587991718426 [2023-08-30 18:58:03,514 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5075 transitions. [2023-08-30 18:58:03,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5075 transitions. [2023-08-30 18:58:03,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:03,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5075 transitions. [2023-08-30 18:58:03,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 181.25) internal successors, (5075), 28 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:03,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 483.0) internal successors, (14007), 29 states have internal predecessors, (14007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:03,523 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 483.0) internal successors, (14007), 29 states have internal predecessors, (14007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:03,523 INFO L175 Difference]: Start difference. First operand has 528 places, 2291 transitions, 56385 flow. Second operand 28 states and 5075 transitions. [2023-08-30 18:58:03,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2496 transitions, 64589 flow [2023-08-30 18:58:12,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2496 transitions, 63410 flow, removed 96 selfloop flow, removed 13 redundant places. [2023-08-30 18:58:12,760 INFO L231 Difference]: Finished difference. Result has 547 places, 2345 transitions, 58252 flow [2023-08-30 18:58:12,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=55232, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=58252, PETRI_PLACES=547, PETRI_TRANSITIONS=2345} [2023-08-30 18:58:12,761 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 522 predicate places. [2023-08-30 18:58:12,762 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 2345 transitions, 58252 flow [2023-08-30 18:58:12,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:12,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:12,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:12,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-30 18:58:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:12,963 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:12,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2127378916, now seen corresponding path program 15 times [2023-08-30 18:58:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939856536] [2023-08-30 18:58:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:58:13,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939856536] [2023-08-30 18:58:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939856536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225303470] [2023-08-30 18:58:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:58:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:13,478 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:13,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 18:58:13,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 18:58:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:58:13,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-30 18:58:13,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:13,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:58:14,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:58:14,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:58:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:58:14,524 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-30 18:58:14,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 1 [2023-08-30 18:58:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:58:14,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:15,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:15,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-30 18:58:15,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:15,925 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 422 treesize of output 370 [2023-08-30 18:58:15,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:15,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 271 [2023-08-30 18:58:15,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:15,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 223 [2023-08-30 18:58:16,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:16,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 130 [2023-08-30 18:58:16,127 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 18:58:16,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3062 treesize of output 2690 [2023-08-30 18:58:16,291 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:58:16,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:58:16,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:16,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1302 treesize of output 1202 [2023-08-30 18:58:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:58:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:58:16,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:16,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1158 treesize of output 914 Killed by 15