./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --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 20:10:14,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:10:14,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:10:14,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:10:14,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:10:14,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:10:14,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:10:14,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:10:14,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:10:14,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:10:14,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:10:14,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:10:14,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:10:14,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:10:14,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:10:14,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:10:14,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:10:14,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:10:14,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:10:14,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:10:14,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:10:14,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:10:14,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:10:14,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:10:14,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:10:14,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:10:14,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:10:14,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:10:14,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:10:14,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:10:14,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:10:14,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:10:14,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:10:14,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:10:14,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:10:14,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:10:14,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:10:14,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:10:14,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:10:14,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:10:14,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:10:14,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:10:14,226 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:10:14,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:10:14,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:10:14,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:10:14,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:10:14,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:10:14,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:10:14,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:10:14,229 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:10:14,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:10:14,230 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:10:14,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:10:14,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:10:14,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:10:14,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:10:14,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:10:14,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:10:14,231 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:10:14,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:10:14,232 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:10:14,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:10:14,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:10:14,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:10:14,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:10:14,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:10:14,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:10:14,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:10:14,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:10:14,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:10:14,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:10:14,234 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:10:14,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:10:14,235 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:10:14,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:10:14,235 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:10:14,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:10:14,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:10:14,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:10:14,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:10:14,554 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:10:14,555 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:10:14,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 20:10:15,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:10:15,865 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:10:15,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 20:10:15,874 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4912f652e/0c3483dcf1e4403fb58f26d2ac2e5c14/FLAGc4318c867 [2023-08-30 20:10:15,888 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4912f652e/0c3483dcf1e4403fb58f26d2ac2e5c14 [2023-08-30 20:10:15,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:10:15,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:10:15,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:10:15,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:10:15,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:10:15,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:10:15" (1/1) ... [2023-08-30 20:10:15,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444333da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:15, skipping insertion in model container [2023-08-30 20:10:15,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:10:15" (1/1) ... [2023-08-30 20:10:15,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:10:15,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:10:16,065 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/popl20-channel-sum.wvr.c[2947,2960] [2023-08-30 20:10:16,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:10:16,080 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:10:16,099 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-30 20:10:16,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:10:16,109 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:10:16,109 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:10:16,115 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:10:16,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16 WrapperNode [2023-08-30 20:10:16,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:10:16,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:10:16,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:10:16,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:10:16,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,150 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 155 [2023-08-30 20:10:16,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:10:16,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:10:16,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:10:16,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:10:16,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,199 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:10:16,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:10:16,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:10:16,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:10:16,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (1/1) ... [2023-08-30 20:10:16,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:10:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:16,246 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 20:10:16,274 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 20:10:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:10:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:10:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:10:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:10:16,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:10:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:10:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:10:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:10:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:10:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:10:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:10:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:10:16,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:10:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:10:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:10:16,293 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 20:10:16,445 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:10:16,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:10:16,762 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:10:16,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:10:16,832 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 20:10:16,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:10:16 BoogieIcfgContainer [2023-08-30 20:10:16,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:10:16,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:10:16,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:10:16,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:10:16,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:10:15" (1/3) ... [2023-08-30 20:10:16,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e18f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:10:16, skipping insertion in model container [2023-08-30 20:10:16,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:16" (2/3) ... [2023-08-30 20:10:16,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e18f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:10:16, skipping insertion in model container [2023-08-30 20:10:16,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:10:16" (3/3) ... [2023-08-30 20:10:16,843 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-08-30 20:10:16,850 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:10:16,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:10:16,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:10:16,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:10:16,941 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:10:16,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 135 transitions, 286 flow [2023-08-30 20:10:17,033 INFO L130 PetriNetUnfolder]: 11/133 cut-off events. [2023-08-30 20:10:17,034 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:10:17,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 11/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-30 20:10:17,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 135 transitions, 286 flow [2023-08-30 20:10:17,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2023-08-30 20:10:17,049 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:10:17,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 125 transitions, 262 flow [2023-08-30 20:10:17,071 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 125 transitions, 262 flow [2023-08-30 20:10:17,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 262 flow [2023-08-30 20:10:17,118 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-08-30 20:10:17,118 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:10:17,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-30 20:10:17,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-08-30 20:10:21,258 INFO L134 LiptonReduction]: Checked pairs total: 1508 [2023-08-30 20:10:21,258 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-30 20:10:21,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:10:21,275 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;@688c1783, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:10:21,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:10:21,281 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-08-30 20:10:21,281 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:10:21,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:21,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:21,282 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 20:10:21,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1385195944, now seen corresponding path program 1 times [2023-08-30 20:10:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:21,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722485689] [2023-08-30 20:10:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:21,685 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 20:10:21,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:21,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722485689] [2023-08-30 20:10:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722485689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:21,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:21,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:10:21,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542621576] [2023-08-30 20:10:21,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:21,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:10:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:21,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:10:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:10:21,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 267 [2023-08-30 20:10:21,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:21,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:21,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 267 [2023-08-30 20:10:21,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:21,794 INFO L130 PetriNetUnfolder]: 87/153 cut-off events. [2023-08-30 20:10:21,794 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 20:10:21,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 153 events. 87/153 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 486 event pairs, 21 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 244. Up to 87 conditions per place. [2023-08-30 20:10:21,797 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-08-30 20:10:21,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-08-30 20:10:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:10:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:10:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-30 20:10:21,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47191011235955055 [2023-08-30 20:10:21,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-30 20:10:21,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-30 20:10:21,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:21,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-30 20:10:21,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:21,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:21,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:21,824 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 378 transitions. [2023-08-30 20:10:21,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-08-30 20:10:21,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:10:21,828 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-08-30 20:10:21,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-08-30 20:10:21,832 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-30 20:10:21,832 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-08-30 20:10:21,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:21,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:21,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:21,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:10:21,833 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 20:10:21,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1301726337, now seen corresponding path program 1 times [2023-08-30 20:10:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:21,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930748928] [2023-08-30 20:10:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:22,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930748928] [2023-08-30 20:10:22,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930748928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:22,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:10:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208960381] [2023-08-30 20:10:22,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:22,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:10:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:10:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:10:22,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 267 [2023-08-30 20:10:22,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:22,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 267 [2023-08-30 20:10:22,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:22,119 INFO L130 PetriNetUnfolder]: 74/139 cut-off events. [2023-08-30 20:10:22,119 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:10:22,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 139 events. 74/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 11 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 191. Up to 98 conditions per place. [2023-08-30 20:10:22,121 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 4 changer transitions 6/32 dead transitions. [2023-08-30 20:10:22,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 32 transitions, 143 flow [2023-08-30 20:10:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:10:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:10:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-30 20:10:22,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410112359550562 [2023-08-30 20:10:22,126 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-30 20:10:22,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-30 20:10:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-30 20:10:22,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,134 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 471 transitions. [2023-08-30 20:10:22,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 32 transitions, 143 flow [2023-08-30 20:10:22,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:10:22,136 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 75 flow [2023-08-30 20:10:22,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-08-30 20:10:22,137 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-30 20:10:22,137 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 75 flow [2023-08-30 20:10:22,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:22,138 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 20:10:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:10:22,138 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 20:10:22,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1080410029, now seen corresponding path program 1 times [2023-08-30 20:10:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851884225] [2023-08-30 20:10:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:22,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:10:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851884225] [2023-08-30 20:10:22,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851884225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:22,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:22,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:10:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629654645] [2023-08-30 20:10:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:22,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:10:22,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:10:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:10:22,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 267 [2023-08-30 20:10:22,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:22,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 267 [2023-08-30 20:10:22,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:22,425 INFO L130 PetriNetUnfolder]: 74/157 cut-off events. [2023-08-30 20:10:22,425 INFO L131 PetriNetUnfolder]: For 37/46 co-relation queries the response was YES. [2023-08-30 20:10:22,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 157 events. 74/157 cut-off events. For 37/46 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 523 event pairs, 50 based on Foata normal form. 14/166 useless extension candidates. Maximal degree in co-relation 269. Up to 123 conditions per place. [2023-08-30 20:10:22,430 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 18 selfloop transitions, 2 changer transitions 10/33 dead transitions. [2023-08-30 20:10:22,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 161 flow [2023-08-30 20:10:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:10:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:10:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-08-30 20:10:22,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44569288389513106 [2023-08-30 20:10:22,433 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-08-30 20:10:22,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-08-30 20:10:22,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:22,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-08-30 20:10:22,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,437 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,437 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 75 flow. Second operand 4 states and 476 transitions. [2023-08-30 20:10:22,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 161 flow [2023-08-30 20:10:22,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:10:22,440 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 91 flow [2023-08-30 20:10:22,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-30 20:10:22,441 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-08-30 20:10:22,443 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 91 flow [2023-08-30 20:10:22,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:22,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:22,445 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 20:10:22,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:10:22,445 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 20:10:22,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -350690420, now seen corresponding path program 1 times [2023-08-30 20:10:22,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:22,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838961699] [2023-08-30 20:10:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:22,620 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 20:10:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838961699] [2023-08-30 20:10:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838961699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:22,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909901457] [2023-08-30 20:10:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:22,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:22,625 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 20:10:22,649 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 20:10:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:10:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:23,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2023-08-30 20:10:23,233 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 20:10:23,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:23,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-08-30 20:10:23,512 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 20:10:23,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909901457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:23,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:23,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 10 [2023-08-30 20:10:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423765562] [2023-08-30 20:10:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:23,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:10:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:10:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:10:23,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:10:23,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 112.72727272727273) internal successors, (1240), 11 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:23,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:23,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:10:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:23,685 INFO L130 PetriNetUnfolder]: 98/190 cut-off events. [2023-08-30 20:10:23,685 INFO L131 PetriNetUnfolder]: For 70/73 co-relation queries the response was YES. [2023-08-30 20:10:23,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 190 events. 98/190 cut-off events. For 70/73 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 596 event pairs, 9 based on Foata normal form. 10/197 useless extension candidates. Maximal degree in co-relation 468. Up to 39 conditions per place. [2023-08-30 20:10:23,686 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 21 selfloop transitions, 6 changer transitions 25/53 dead transitions. [2023-08-30 20:10:23,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 270 flow [2023-08-30 20:10:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:10:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:10:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2023-08-30 20:10:23,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43258426966292135 [2023-08-30 20:10:23,696 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2023-08-30 20:10:23,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2023-08-30 20:10:23,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:23,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2023-08-30 20:10:23,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:23,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:23,703 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:23,703 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 91 flow. Second operand 8 states and 924 transitions. [2023-08-30 20:10:23,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 270 flow [2023-08-30 20:10:23,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 262 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 20:10:23,706 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 86 flow [2023-08-30 20:10:23,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2023-08-30 20:10:23,707 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-08-30 20:10:23,707 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 86 flow [2023-08-30 20:10:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 112.72727272727273) internal successors, (1240), 11 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:23,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:23,708 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 20:10:23,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 20:10:23,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:23,915 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 20:10:23,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1764708894, now seen corresponding path program 2 times [2023-08-30 20:10:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229694639] [2023-08-30 20:10:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:24,692 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 20:10:24,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:24,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229694639] [2023-08-30 20:10:24,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229694639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:24,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519358154] [2023-08-30 20:10:24,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:10:24,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:24,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:24,694 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 20:10:24,704 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 20:10:24,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:10:24,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 20:10:24,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:24,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:10:24,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:10:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:10:25,193 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 20:10:25,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:25,873 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ (select .cse0 .cse1) c_~sum~0) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= 0 (+ (select .cse3 .cse1) c_~sum~0)) (not (= (select .cse3 .cse2) 1))))))) (<= c_~n~0 c_~back~0) (<= (+ c_~back~0 1) c_~front~0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-30 20:10:25,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:25,911 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 62 treesize of output 50 [2023-08-30 20:10:25,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:25,923 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 148 treesize of output 140 [2023-08-30 20:10:25,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:25,937 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 132 treesize of output 116 [2023-08-30 20:10:25,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:25,951 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 83 treesize of output 79 [2023-08-30 20:10:26,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:26,263 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 62 treesize of output 50 [2023-08-30 20:10:26,274 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:10:26,274 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 316 treesize of output 288 [2023-08-30 20:10:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:10:26,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-30 20:10:26,316 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:10:26,317 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 95 treesize of output 75 [2023-08-30 20:10:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 20:10:26,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519358154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:26,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:26,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-30 20:10:26,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244269627] [2023-08-30 20:10:26,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:26,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:10:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:10:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=521, Unknown=7, NotChecked=48, Total=702 [2023-08-30 20:10:26,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-08-30 20:10:26,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 86 flow. Second operand has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 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 20:10:26,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:26,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-08-30 20:10:26,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:40,014 WARN L222 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:10:41,476 INFO L130 PetriNetUnfolder]: 375/677 cut-off events. [2023-08-30 20:10:41,476 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2023-08-30 20:10:41,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2009 conditions, 677 events. 375/677 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2943 event pairs, 12 based on Foata normal form. 17/690 useless extension candidates. Maximal degree in co-relation 1249. Up to 140 conditions per place. [2023-08-30 20:10:41,480 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 113 selfloop transitions, 65 changer transitions 43/221 dead transitions. [2023-08-30 20:10:41,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 221 transitions, 1263 flow [2023-08-30 20:10:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 20:10:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 20:10:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3263 transitions. [2023-08-30 20:10:41,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26567334310372903 [2023-08-30 20:10:41,494 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3263 transitions. [2023-08-30 20:10:41,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3263 transitions. [2023-08-30 20:10:41,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:41,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3263 transitions. [2023-08-30 20:10:41,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 70.93478260869566) internal successors, (3263), 46 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:41,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:41,524 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:41,524 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 86 flow. Second operand 46 states and 3263 transitions. [2023-08-30 20:10:41,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 221 transitions, 1263 flow [2023-08-30 20:10:41,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 221 transitions, 1077 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-08-30 20:10:41,534 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 561 flow [2023-08-30 20:10:41,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=561, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-08-30 20:10:41,536 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-08-30 20:10:41,537 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 561 flow [2023-08-30 20:10:41,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 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 20:10:41,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:41,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:41,557 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 20:10:41,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:41,751 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 20:10:41,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1161701845, now seen corresponding path program 3 times [2023-08-30 20:10:41,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:41,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696364073] [2023-08-30 20:10:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:41,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696364073] [2023-08-30 20:10:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696364073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137381441] [2023-08-30 20:10:41,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:10:41,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:41,966 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 20:10:41,993 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 20:10:42,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:10:42,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:10:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:42,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:42,164 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 27 treesize of output 9 [2023-08-30 20:10:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:42,706 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:10:42,707 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 231 treesize of output 183 [2023-08-30 20:10:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137381441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:42,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:42,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-08-30 20:10:42,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819050690] [2023-08-30 20:10:42,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:42,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:10:42,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:10:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:10:43,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 267 [2023-08-30 20:10:43,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 561 flow. Second operand has 17 states, 17 states have (on average 100.88235294117646) internal successors, (1715), 17 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:43,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:43,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 267 [2023-08-30 20:10:43,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:43,963 INFO L130 PetriNetUnfolder]: 855/1488 cut-off events. [2023-08-30 20:10:43,963 INFO L131 PetriNetUnfolder]: For 792/792 co-relation queries the response was YES. [2023-08-30 20:10:43,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4611 conditions, 1488 events. 855/1488 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7401 event pairs, 26 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 4515. Up to 302 conditions per place. [2023-08-30 20:10:43,973 INFO L137 encePairwiseOnDemand]: 260/267 looper letters, 163 selfloop transitions, 188 changer transitions 1/352 dead transitions. [2023-08-30 20:10:43,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 352 transitions, 2457 flow [2023-08-30 20:10:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 20:10:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 20:10:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3417 transitions. [2023-08-30 20:10:43,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878106911814777 [2023-08-30 20:10:43,982 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3417 transitions. [2023-08-30 20:10:43,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3417 transitions. [2023-08-30 20:10:43,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:43,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3417 transitions. [2023-08-30 20:10:43,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.54545454545455) internal successors, (3417), 33 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,003 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,003 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 561 flow. Second operand 33 states and 3417 transitions. [2023-08-30 20:10:44,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 352 transitions, 2457 flow [2023-08-30 20:10:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 352 transitions, 2080 flow, removed 182 selfloop flow, removed 7 redundant places. [2023-08-30 20:10:44,015 INFO L231 Difference]: Finished difference. Result has 109 places, 253 transitions, 1649 flow [2023-08-30 20:10:44,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1649, PETRI_PLACES=109, PETRI_TRANSITIONS=253} [2023-08-30 20:10:44,016 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2023-08-30 20:10:44,017 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 253 transitions, 1649 flow [2023-08-30 20:10:44,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.88235294117646) internal successors, (1715), 17 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:44,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:44,028 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 20:10:44,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:44,224 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 20:10:44,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1509252043, now seen corresponding path program 4 times [2023-08-30 20:10:44,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:44,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280913356] [2023-08-30 20:10:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:10:44,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:44,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280913356] [2023-08-30 20:10:44,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280913356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:44,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963337686] [2023-08-30 20:10:44,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:10:44,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:44,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:44,416 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 20:10:44,440 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 20:10:44,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:10:44,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 20:10:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:10:44,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:44,908 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:10:44,908 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 211 treesize of output 163 [2023-08-30 20:10:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:10:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963337686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:44,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 20:10:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557676799] [2023-08-30 20:10:44,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:10:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:44,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:10:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:10:45,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 267 [2023-08-30 20:10:45,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 253 transitions, 1649 flow. Second operand has 12 states, 12 states have (on average 103.33333333333333) internal successors, (1240), 12 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:45,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:45,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 267 [2023-08-30 20:10:45,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:45,396 INFO L130 PetriNetUnfolder]: 535/970 cut-off events. [2023-08-30 20:10:45,396 INFO L131 PetriNetUnfolder]: For 525/531 co-relation queries the response was YES. [2023-08-30 20:10:45,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 970 events. 535/970 cut-off events. For 525/531 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4436 event pairs, 272 based on Foata normal form. 22/957 useless extension candidates. Maximal degree in co-relation 3203. Up to 866 conditions per place. [2023-08-30 20:10:45,403 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 171 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-08-30 20:10:45,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1497 flow [2023-08-30 20:10:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:10:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:10:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 643 transitions. [2023-08-30 20:10:45,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013732833957553 [2023-08-30 20:10:45,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 643 transitions. [2023-08-30 20:10:45,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 643 transitions. [2023-08-30 20:10:45,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:45,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 643 transitions. [2023-08-30 20:10:45,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.16666666666667) internal successors, (643), 6 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:45,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 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 20:10:45,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 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 20:10:45,411 INFO L175 Difference]: Start difference. First operand has 109 places, 253 transitions, 1649 flow. Second operand 6 states and 643 transitions. [2023-08-30 20:10:45,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1497 flow [2023-08-30 20:10:45,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 182 transitions, 1344 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-08-30 20:10:45,420 INFO L231 Difference]: Finished difference. Result has 90 places, 171 transitions, 970 flow [2023-08-30 20:10:45,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=970, PETRI_PLACES=90, PETRI_TRANSITIONS=171} [2023-08-30 20:10:45,421 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2023-08-30 20:10:45,421 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 171 transitions, 970 flow [2023-08-30 20:10:45,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 103.33333333333333) internal successors, (1240), 12 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:45,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:45,422 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:45,434 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 20:10:45,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:45,631 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 20:10:45,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1696286187, now seen corresponding path program 5 times [2023-08-30 20:10:45,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:45,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398083168] [2023-08-30 20:10:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:45,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398083168] [2023-08-30 20:10:46,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398083168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014356241] [2023-08-30 20:10:46,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:10:46,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:46,881 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 20:10:46,891 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 20:10:46,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:10:46,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:46,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 20:10:46,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:10:47,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:47,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:47,502 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 186 treesize of output 146 [2023-08-30 20:10:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:10:47,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014356241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:47,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:47,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-30 20:10:47,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068708717] [2023-08-30 20:10:47,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:47,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:10:47,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:10:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-08-30 20:10:48,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-08-30 20:10:48,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 171 transitions, 970 flow. Second operand has 26 states, 26 states have (on average 91.03846153846153) internal successors, (2367), 26 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:48,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:48,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-08-30 20:10:48,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:50,334 INFO L130 PetriNetUnfolder]: 1047/1843 cut-off events. [2023-08-30 20:10:50,334 INFO L131 PetriNetUnfolder]: For 660/660 co-relation queries the response was YES. [2023-08-30 20:10:50,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 1843 events. 1047/1843 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9631 event pairs, 39 based on Foata normal form. 7/1788 useless extension candidates. Maximal degree in co-relation 5456. Up to 461 conditions per place. [2023-08-30 20:10:50,343 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 243 selfloop transitions, 133 changer transitions 28/404 dead transitions. [2023-08-30 20:10:50,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 404 transitions, 2874 flow [2023-08-30 20:10:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:10:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:10:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3466 transitions. [2023-08-30 20:10:50,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508452272497216 [2023-08-30 20:10:50,350 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3466 transitions. [2023-08-30 20:10:50,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3466 transitions. [2023-08-30 20:10:50,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:50,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3466 transitions. [2023-08-30 20:10:50,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 93.67567567567568) internal successors, (3466), 37 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:50,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:50,383 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:50,383 INFO L175 Difference]: Start difference. First operand has 90 places, 171 transitions, 970 flow. Second operand 37 states and 3466 transitions. [2023-08-30 20:10:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 404 transitions, 2874 flow [2023-08-30 20:10:50,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 404 transitions, 2865 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:10:50,395 INFO L231 Difference]: Finished difference. Result has 131 places, 246 transitions, 1858 flow [2023-08-30 20:10:50,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1858, PETRI_PLACES=131, PETRI_TRANSITIONS=246} [2023-08-30 20:10:50,397 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2023-08-30 20:10:50,397 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 246 transitions, 1858 flow [2023-08-30 20:10:50,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 91.03846153846153) internal successors, (2367), 26 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:50,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:50,399 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:50,404 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 20:10:50,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:50,605 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 20:10:50,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1631762424, now seen corresponding path program 6 times [2023-08-30 20:10:50,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:50,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235737438] [2023-08-30 20:10:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:50,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:50,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235737438] [2023-08-30 20:10:50,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235737438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:50,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720393358] [2023-08-30 20:10:50,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:10:50,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:50,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:50,752 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 20:10:50,754 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 20:10:50,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 20:10:50,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:10:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:51,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2023-08-30 20:10:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:10:51,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:51,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-08-30 20:10:51,332 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:10:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:10:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720393358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:51,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 20:10:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694522715] [2023-08-30 20:10:51,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:10:51,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:10:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:10:51,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 267 [2023-08-30 20:10:51,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 246 transitions, 1858 flow. Second operand has 15 states, 15 states have (on average 105.06666666666666) internal successors, (1576), 15 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:51,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:51,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 267 [2023-08-30 20:10:51,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:51,963 INFO L130 PetriNetUnfolder]: 922/1624 cut-off events. [2023-08-30 20:10:51,964 INFO L131 PetriNetUnfolder]: For 1471/1471 co-relation queries the response was YES. [2023-08-30 20:10:51,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1624 events. 922/1624 cut-off events. For 1471/1471 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8159 event pairs, 163 based on Foata normal form. 20/1638 useless extension candidates. Maximal degree in co-relation 4971. Up to 1339 conditions per place. [2023-08-30 20:10:51,974 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 207 selfloop transitions, 33 changer transitions 16/260 dead transitions. [2023-08-30 20:10:51,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 260 transitions, 2344 flow [2023-08-30 20:10:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:10:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:10:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1077 transitions. [2023-08-30 20:10:51,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337078651685393 [2023-08-30 20:10:51,977 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1077 transitions. [2023-08-30 20:10:51,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1077 transitions. [2023-08-30 20:10:51,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:51,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1077 transitions. [2023-08-30 20:10:51,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 107.7) internal successors, (1077), 10 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:51,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:51,982 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:51,982 INFO L175 Difference]: Start difference. First operand has 131 places, 246 transitions, 1858 flow. Second operand 10 states and 1077 transitions. [2023-08-30 20:10:51,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 260 transitions, 2344 flow [2023-08-30 20:10:51,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 260 transitions, 2218 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-08-30 20:10:51,997 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 1706 flow [2023-08-30 20:10:51,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1706, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2023-08-30 20:10:51,999 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 107 predicate places. [2023-08-30 20:10:51,999 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 1706 flow [2023-08-30 20:10:51,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 105.06666666666666) internal successors, (1576), 15 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:51,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:52,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:52,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 20:10:52,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:52,206 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 20:10:52,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash 398771022, now seen corresponding path program 7 times [2023-08-30 20:10:52,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:52,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301111126] [2023-08-30 20:10:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:53,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301111126] [2023-08-30 20:10:53,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301111126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:53,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713795234] [2023-08-30 20:10:53,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:10:53,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:53,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:53,082 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 20:10:53,084 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 20:10:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 20:10:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:53,462 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-30 20:10:53,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-08-30 20:10:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:10:53,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:54,126 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 20:10:54,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 204 [2023-08-30 20:10:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:54,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713795234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:54,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:54,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-08-30 20:10:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554775321] [2023-08-30 20:10:54,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:54,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:10:54,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:10:54,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-08-30 20:10:55,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 267 [2023-08-30 20:10:55,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 1706 flow. Second operand has 32 states, 32 states have (on average 89.90625) internal successors, (2877), 32 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:55,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:55,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 267 [2023-08-30 20:10:55,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:58,060 INFO L130 PetriNetUnfolder]: 2207/3813 cut-off events. [2023-08-30 20:10:58,060 INFO L131 PetriNetUnfolder]: For 3470/3470 co-relation queries the response was YES. [2023-08-30 20:10:58,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13509 conditions, 3813 events. 2207/3813 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22929 event pairs, 50 based on Foata normal form. 36/3849 useless extension candidates. Maximal degree in co-relation 12496. Up to 1073 conditions per place. [2023-08-30 20:10:58,080 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 319 selfloop transitions, 307 changer transitions 82/708 dead transitions. [2023-08-30 20:10:58,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 708 transitions, 6036 flow [2023-08-30 20:10:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 20:10:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 20:10:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4708 transitions. [2023-08-30 20:10:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457442902254535 [2023-08-30 20:10:58,088 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4708 transitions. [2023-08-30 20:10:58,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4708 transitions. [2023-08-30 20:10:58,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:58,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4708 transitions. [2023-08-30 20:10:58,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 92.31372549019608) internal successors, (4708), 51 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:58,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:58,146 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:58,146 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 1706 flow. Second operand 51 states and 4708 transitions. [2023-08-30 20:10:58,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 708 transitions, 6036 flow [2023-08-30 20:10:58,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 708 transitions, 5978 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-30 20:10:58,179 INFO L231 Difference]: Finished difference. Result has 183 places, 414 transitions, 4002 flow [2023-08-30 20:10:58,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4002, PETRI_PLACES=183, PETRI_TRANSITIONS=414} [2023-08-30 20:10:58,180 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2023-08-30 20:10:58,181 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 414 transitions, 4002 flow [2023-08-30 20:10:58,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.90625) internal successors, (2877), 32 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:58,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:58,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:58,188 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 20:10:58,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:58,388 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 20:10:58,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash 365335128, now seen corresponding path program 8 times [2023-08-30 20:10:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575626442] [2023-08-30 20:10:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:58,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575626442] [2023-08-30 20:10:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575626442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414203450] [2023-08-30 20:10:59,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:10:59,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:59,401 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 20:10:59,409 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 20:10:59,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:10:59,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 20:10:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:59,824 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-08-30 20:10:59,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-08-30 20:10:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:10:59,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:00,478 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 20:11:00,479 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 258 treesize of output 204 [2023-08-30 20:11:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414203450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:00,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:00,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-08-30 20:11:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901818664] [2023-08-30 20:11:00,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:00,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:11:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:11:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-08-30 20:11:01,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-08-30 20:11:01,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 414 transitions, 4002 flow. Second operand has 32 states, 32 states have (on average 90.90625) internal successors, (2909), 32 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:01,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:01,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-08-30 20:11:01,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:04,358 INFO L130 PetriNetUnfolder]: 3555/6063 cut-off events. [2023-08-30 20:11:04,358 INFO L131 PetriNetUnfolder]: For 11452/11452 co-relation queries the response was YES. [2023-08-30 20:11:04,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 6063 events. 3555/6063 cut-off events. For 11452/11452 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39747 event pairs, 106 based on Foata normal form. 34/6097 useless extension candidates. Maximal degree in co-relation 24895. Up to 2075 conditions per place. [2023-08-30 20:11:04,406 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 313 selfloop transitions, 466 changer transitions 78/857 dead transitions. [2023-08-30 20:11:04,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 857 transitions, 9113 flow [2023-08-30 20:11:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 20:11:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 20:11:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4107 transitions. [2023-08-30 20:11:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495914198161389 [2023-08-30 20:11:04,412 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4107 transitions. [2023-08-30 20:11:04,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4107 transitions. [2023-08-30 20:11:04,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:11:04,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4107 transitions. [2023-08-30 20:11:04,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 93.3409090909091) internal successors, (4107), 44 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:04,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:04,428 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:04,428 INFO L175 Difference]: Start difference. First operand has 183 places, 414 transitions, 4002 flow. Second operand 44 states and 4107 transitions. [2023-08-30 20:11:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 857 transitions, 9113 flow [2023-08-30 20:11:04,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 857 transitions, 8808 flow, removed 96 selfloop flow, removed 14 redundant places. [2023-08-30 20:11:04,701 INFO L231 Difference]: Finished difference. Result has 219 places, 611 transitions, 7052 flow [2023-08-30 20:11:04,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7052, PETRI_PLACES=219, PETRI_TRANSITIONS=611} [2023-08-30 20:11:04,702 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 197 predicate places. [2023-08-30 20:11:04,702 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 611 transitions, 7052 flow [2023-08-30 20:11:04,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 90.90625) internal successors, (2909), 32 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:04,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:04,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:04,709 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 20:11:04,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 20:11:04,904 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 20:11:04,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -27716245, now seen corresponding path program 9 times [2023-08-30 20:11:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:04,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078875816] [2023-08-30 20:11:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:11:06,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:06,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078875816] [2023-08-30 20:11:06,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078875816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:06,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848355574] [2023-08-30 20:11:06,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:11:06,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:06,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:06,500 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 20:11:06,526 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 20:11:06,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:11:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:11:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 20:11:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:06,995 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-08-30 20:11:06,995 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 50 treesize of output 21 [2023-08-30 20:11:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:11:07,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:07,611 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:11:07,612 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 268 treesize of output 222 [2023-08-30 20:11:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:11:08,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848355574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:08,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:08,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 33 [2023-08-30 20:11:08,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839920160] [2023-08-30 20:11:08,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:08,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:11:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:11:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 20:11:09,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 267 [2023-08-30 20:11:09,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 611 transitions, 7052 flow. Second operand has 35 states, 35 states have (on average 85.8) internal successors, (3003), 35 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:09,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:09,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 267 [2023-08-30 20:11:09,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:13,372 INFO L130 PetriNetUnfolder]: 6085/10306 cut-off events. [2023-08-30 20:11:13,372 INFO L131 PetriNetUnfolder]: For 32346/32346 co-relation queries the response was YES. [2023-08-30 20:11:13,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47509 conditions, 10306 events. 6085/10306 cut-off events. For 32346/32346 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 72264 event pairs, 230 based on Foata normal form. 59/10365 useless extension candidates. Maximal degree in co-relation 47403. Up to 3997 conditions per place. [2023-08-30 20:11:13,450 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 447 selfloop transitions, 808 changer transitions 98/1353 dead transitions. [2023-08-30 20:11:13,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1353 transitions, 16882 flow [2023-08-30 20:11:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 20:11:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 20:11:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5927 transitions. [2023-08-30 20:11:13,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.331320923472525 [2023-08-30 20:11:13,458 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5927 transitions. [2023-08-30 20:11:13,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5927 transitions. [2023-08-30 20:11:13,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:11:13,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5927 transitions. [2023-08-30 20:11:13,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 88.46268656716418) internal successors, (5927), 67 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:13,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:13,481 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:13,482 INFO L175 Difference]: Start difference. First operand has 219 places, 611 transitions, 7052 flow. Second operand 67 states and 5927 transitions. [2023-08-30 20:11:13,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1353 transitions, 16882 flow [2023-08-30 20:11:14,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1353 transitions, 16410 flow, removed 153 selfloop flow, removed 25 redundant places. [2023-08-30 20:11:14,178 INFO L231 Difference]: Finished difference. Result has 280 places, 1000 transitions, 13853 flow [2023-08-30 20:11:14,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=13853, PETRI_PLACES=280, PETRI_TRANSITIONS=1000} [2023-08-30 20:11:14,179 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 258 predicate places. [2023-08-30 20:11:14,179 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 1000 transitions, 13853 flow [2023-08-30 20:11:14,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.8) internal successors, (3003), 35 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:14,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:14,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:14,185 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 20:11:14,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:14,380 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 20:11:14,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash 366817643, now seen corresponding path program 10 times [2023-08-30 20:11:14,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:14,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479525275] [2023-08-30 20:11:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 20:11:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479525275] [2023-08-30 20:11:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479525275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:14,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590092507] [2023-08-30 20:11:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:11:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:14,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:14,597 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 20:11:14,620 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 20:11:14,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:11:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:11:14,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:11:14,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 20:11:15,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:15,644 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 20:11:15,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 177 [2023-08-30 20:11:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 20:11:15,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590092507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:15,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:15,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-30 20:11:15,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313354450] [2023-08-30 20:11:15,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:11:15,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:11:15,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:11:16,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 267 [2023-08-30 20:11:16,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1000 transitions, 13853 flow. Second operand has 19 states, 19 states have (on average 100.84210526315789) internal successors, (1916), 19 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:16,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:16,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 267 [2023-08-30 20:11:16,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:17,995 INFO L130 PetriNetUnfolder]: 5035/8533 cut-off events. [2023-08-30 20:11:17,995 INFO L131 PetriNetUnfolder]: For 42655/42687 co-relation queries the response was YES. [2023-08-30 20:11:18,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44534 conditions, 8533 events. 5035/8533 cut-off events. For 42655/42687 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 58407 event pairs, 2478 based on Foata normal form. 30/8531 useless extension candidates. Maximal degree in co-relation 44448. Up to 8358 conditions per place. [2023-08-30 20:11:18,075 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 853 selfloop transitions, 4 changer transitions 31/902 dead transitions. [2023-08-30 20:11:18,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 902 transitions, 14220 flow [2023-08-30 20:11:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:11:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:11:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 930 transitions. [2023-08-30 20:11:18,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38701622971285893 [2023-08-30 20:11:18,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 930 transitions. [2023-08-30 20:11:18,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 930 transitions. [2023-08-30 20:11:18,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:11:18,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 930 transitions. [2023-08-30 20:11:18,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.33333333333333) internal successors, (930), 9 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:18,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:18,082 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:18,082 INFO L175 Difference]: Start difference. First operand has 280 places, 1000 transitions, 13853 flow. Second operand 9 states and 930 transitions. [2023-08-30 20:11:18,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 902 transitions, 14220 flow [2023-08-30 20:11:18,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 902 transitions, 13705 flow, removed 156 selfloop flow, removed 23 redundant places. [2023-08-30 20:11:18,968 INFO L231 Difference]: Finished difference. Result has 259 places, 871 transitions, 11681 flow [2023-08-30 20:11:18,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11870, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11681, PETRI_PLACES=259, PETRI_TRANSITIONS=871} [2023-08-30 20:11:18,969 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2023-08-30 20:11:18,969 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 871 transitions, 11681 flow [2023-08-30 20:11:18,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.84210526315789) internal successors, (1916), 19 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:18,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:18,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:18,975 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 20:11:19,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:11:19,170 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 20:11:19,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1142993844, now seen corresponding path program 11 times [2023-08-30 20:11:19,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:19,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927442156] [2023-08-30 20:11:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:19,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:11:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927442156] [2023-08-30 20:11:20,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927442156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481342252] [2023-08-30 20:11:20,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:11:20,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:20,649 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 20:11:20,651 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 20:11:20,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:11:20,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:11:20,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 20:11:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:20,908 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 15 treesize of output 11 [2023-08-30 20:11:20,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:11:21,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:11:21,775 INFO L321 Elim1Store]: treesize reduction 77, result has 11.5 percent of original size [2023-08-30 20:11:21,776 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 73 treesize of output 29 [2023-08-30 20:11:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:11:21,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:24,009 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 (+ c_~back~0 2)) (let ((.cse9 (* c_~front~0 4)) (.cse8 (* c_~back~0 4))) (let ((.cse4 (+ .cse8 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse9 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ .cse9 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse8 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_421 (Array Int Int)) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 .cse3)) 1) (not (= (+ (select .cse0 .cse4) 1) 0)) (not (= (select .cse0 .cse5) 1)) (not (= (select .cse0 .cse6) 1))))) (forall ((v_ArrVal_421 (Array Int Int)) (v_ArrVal_420 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (+ (select .cse7 .cse4) 1) 0)) (not (= (select .cse7 .cse5) 1)) (<= 0 (+ c_~sum~0 (select .cse7 .cse1) (select .cse7 .cse2) (select .cse7 .cse3))) (not (= (select .cse7 .cse6) 1)))))))) (<= (+ c_~back~0 1) c_~front~0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-30 20:11:24,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:24,070 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 182 treesize of output 122 [2023-08-30 20:11:24,150 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:11:24,151 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 792 treesize of output 742 [2023-08-30 20:11:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:24,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:24,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:24,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:24,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 270 [2023-08-30 20:11:24,291 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:11:24,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 255 treesize of output 229 [2023-08-30 20:11:26,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:26,388 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 182 treesize of output 122 [2023-08-30 20:11:26,418 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:11:26,418 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 376 treesize of output 336 [2023-08-30 20:11:26,452 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:11:26,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 324 treesize of output 256 [2023-08-30 20:11:26,484 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:11:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 215 treesize of output 187 [2023-08-30 20:11:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 20:11:26,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481342252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:26,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:26,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 48 [2023-08-30 20:11:26,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541353854] [2023-08-30 20:11:26,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:26,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-30 20:11:26,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:26,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-30 20:11:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1948, Unknown=4, NotChecked=94, Total=2450 [2023-08-30 20:11:27,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-08-30 20:11:27,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 871 transitions, 11681 flow. Second operand has 50 states, 50 states have (on average 67.48) internal successors, (3374), 50 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:27,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:27,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-08-30 20:11:27,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:40,851 INFO L130 PetriNetUnfolder]: 7042/11958 cut-off events. [2023-08-30 20:11:40,852 INFO L131 PetriNetUnfolder]: For 53931/53931 co-relation queries the response was YES. [2023-08-30 20:11:40,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60886 conditions, 11958 events. 7042/11958 cut-off events. For 53931/53931 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 86424 event pairs, 234 based on Foata normal form. 78/12036 useless extension candidates. Maximal degree in co-relation 60823. Up to 4861 conditions per place. [2023-08-30 20:11:40,954 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 449 selfloop transitions, 1072 changer transitions 138/1659 dead transitions. [2023-08-30 20:11:40,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1659 transitions, 22612 flow [2023-08-30 20:11:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-30 20:11:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-30 20:11:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 6837 transitions. [2023-08-30 20:11:40,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2639870265261207 [2023-08-30 20:11:40,965 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 6837 transitions. [2023-08-30 20:11:40,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 6837 transitions. [2023-08-30 20:11:40,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:11:40,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 6837 transitions. [2023-08-30 20:11:40,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 70.48453608247422) internal successors, (6837), 97 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:40,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 267.0) internal successors, (26166), 98 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:40,996 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 267.0) internal successors, (26166), 98 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:40,997 INFO L175 Difference]: Start difference. First operand has 259 places, 871 transitions, 11681 flow. Second operand 97 states and 6837 transitions. [2023-08-30 20:11:40,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1659 transitions, 22612 flow [2023-08-30 20:11:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1659 transitions, 22217 flow, removed 132 selfloop flow, removed 19 redundant places. [2023-08-30 20:11:42,041 INFO L231 Difference]: Finished difference. Result has 368 places, 1271 transitions, 20418 flow [2023-08-30 20:11:42,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=10337, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=20418, PETRI_PLACES=368, PETRI_TRANSITIONS=1271} [2023-08-30 20:11:42,042 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 346 predicate places. [2023-08-30 20:11:42,042 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1271 transitions, 20418 flow [2023-08-30 20:11:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 67.48) internal successors, (3374), 50 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:42,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:42,043 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:42,049 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 20:11:42,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:11:42,247 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 20:11:42,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 48671904, now seen corresponding path program 12 times [2023-08-30 20:11:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105197998] [2023-08-30 20:11:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:11:43,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:43,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105197998] [2023-08-30 20:11:43,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105197998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:43,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546509218] [2023-08-30 20:11:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:11:43,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:43,689 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 20:11:43,692 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 20:11:44,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 20:11:44,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:11:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-30 20:11:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:44,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 20:11:44,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:11:44,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:11:44,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:44,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 12 [2023-08-30 20:11:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:11:44,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:46,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:46,680 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 182 treesize of output 122 [2023-08-30 20:11:46,738 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:11:46,739 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 792 treesize of output 742 [2023-08-30 20:11:46,759 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:46,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:46,761 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:46,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:46,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 270 [2023-08-30 20:11:46,857 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:11:46,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 255 treesize of output 229 [2023-08-30 20:11:49,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:49,160 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 182 treesize of output 122 [2023-08-30 20:11:49,187 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:11:49,188 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 792 treesize of output 700 [2023-08-30 20:11:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:11:49,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:49,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:49,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:11:49,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:11:49,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-08-30 20:11:49,245 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-30 20:11:49,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 255 treesize of output 187 [2023-08-30 20:11:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:11:49,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546509218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:49,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:49,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 51 [2023-08-30 20:11:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989075304] [2023-08-30 20:11:49,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:49,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 20:11:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 20:11:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2323, Unknown=4, NotChecked=0, Total=2756 [2023-08-30 20:11:50,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-08-30 20:11:50,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1271 transitions, 20418 flow. Second operand has 53 states, 53 states have (on average 67.39622641509433) internal successors, (3572), 53 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:50,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:50,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-08-30 20:11:50,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:51,125 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse14 (* c_~front~0 4)) (.cse13 (* c_~back~0 4))) (let ((.cse0 (<= c_~n~0 (+ c_~back~0 2))) (.cse1 (<= (+ c_~back~0 1) c_~front~0)) (.cse3 (+ c_~queue~0.offset .cse13 4)) (.cse7 (+ c_~queue~0.offset .cse14)) (.cse8 (+ c_~queue~0.offset .cse14 4)) (.cse6 (+ c_~queue~0.offset .cse14 8)) (.cse10 (+ c_~queue~0.offset .cse13)) (.cse4 (+ c_~queue~0.offset .cse13 8)) (.cse9 (< c_~front~0 0))) (and (let ((.cse2 (select |c_#memory_int| c_~queue~0.base))) (or .cse0 .cse1 (not (= (+ (select .cse2 .cse3) 1) 0)) (not (= (select .cse2 .cse4) 1)) (let ((.cse5 (+ c_~sum~0 (select .cse2 .cse6) (select .cse2 .cse7) (select .cse2 .cse8)))) (and (<= 0 .cse5) (<= .cse5 1))) .cse9 (not (= (select .cse2 .cse10) 1)))) (or (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 (and (<= c_~sum~0 0) (<= 0 (+ c_~sum~0 1)) (= c_~back~0 c_~front~0)) .cse1 .cse9) (or .cse0 .cse1 (and (forall ((v_ArrVal_463 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_463) c_~queue~0.base))) (or (not (= (+ (select .cse11 .cse3) 1) 0)) (<= 0 (+ c_~sum~0 (select .cse11 .cse7) (select .cse11 .cse8) (select .cse11 .cse6))) (not (= (select .cse11 .cse10) 1)) (not (= (select .cse11 .cse4) 1))))) (forall ((v_ArrVal_463 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_463) c_~queue~0.base))) (or (not (= (+ (select .cse12 .cse3) 1) 0)) (<= (+ c_~sum~0 (select .cse12 .cse7) (select .cse12 .cse8) (select .cse12 .cse6)) 1) (not (= (select .cse12 .cse10) 1)) (not (= (select .cse12 .cse4) 1)))))) .cse9) (<= 0 c_~sum~0) (<= c_~sum~0 1)))) is different from false [2023-08-30 20:12:28,314 INFO L130 PetriNetUnfolder]: 11344/19341 cut-off events. [2023-08-30 20:12:28,314 INFO L131 PetriNetUnfolder]: For 176363/176363 co-relation queries the response was YES. [2023-08-30 20:12:28,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118918 conditions, 19341 events. 11344/19341 cut-off events. For 176363/176363 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 150041 event pairs, 464 based on Foata normal form. 189/19530 useless extension candidates. Maximal degree in co-relation 118812. Up to 7621 conditions per place. [2023-08-30 20:12:28,545 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 943 selfloop transitions, 1919 changer transitions 102/2964 dead transitions. [2023-08-30 20:12:28,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 2964 transitions, 48382 flow [2023-08-30 20:12:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-08-30 20:12:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2023-08-30 20:12:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 13791 transitions. [2023-08-30 20:12:28,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2635290071084614 [2023-08-30 20:12:28,562 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 13791 transitions. [2023-08-30 20:12:28,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 13791 transitions. [2023-08-30 20:12:28,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:12:28,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 13791 transitions. [2023-08-30 20:12:28,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 197 states, 196 states have (on average 70.36224489795919) internal successors, (13791), 196 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:28,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 197 states, 197 states have (on average 267.0) internal successors, (52599), 197 states have internal predecessors, (52599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:28,630 INFO L81 ComplementDD]: Finished complementDD. Result has 197 states, 197 states have (on average 267.0) internal successors, (52599), 197 states have internal predecessors, (52599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:28,631 INFO L175 Difference]: Start difference. First operand has 368 places, 1271 transitions, 20418 flow. Second operand 196 states and 13791 transitions. [2023-08-30 20:12:28,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 2964 transitions, 48382 flow [2023-08-30 20:12:32,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 2964 transitions, 43983 flow, removed 1295 selfloop flow, removed 29 redundant places. [2023-08-30 20:12:32,527 INFO L231 Difference]: Finished difference. Result has 613 places, 2216 transitions, 39734 flow [2023-08-30 20:12:32,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=17081, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=958, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=39734, PETRI_PLACES=613, PETRI_TRANSITIONS=2216} [2023-08-30 20:12:32,529 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 591 predicate places. [2023-08-30 20:12:32,529 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 2216 transitions, 39734 flow [2023-08-30 20:12:32,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 67.39622641509433) internal successors, (3572), 53 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:32,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:12:32,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:12:32,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 20:12:32,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:12:32,731 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 20:12:32,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:12:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1100804600, now seen corresponding path program 13 times [2023-08-30 20:12:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:12:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610613261] [2023-08-30 20:12:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:12:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:12:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:12:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:12:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610613261] [2023-08-30 20:12:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610613261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:12:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617275137] [2023-08-30 20:12:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:12:34,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:12:34,158 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 20:12:34,160 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 20:12:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 20:12:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:12:34,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:34,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 12 [2023-08-30 20:12:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:12:34,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:12:35,979 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 20:12:35,980 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 316 treesize of output 256 [2023-08-30 20:12:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:12:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617275137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:12:37,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:12:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2023-08-30 20:12:37,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670091724] [2023-08-30 20:12:37,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:12:37,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 20:12:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:12:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 20:12:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1746, Unknown=0, NotChecked=0, Total=2162 [2023-08-30 20:12:38,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 267 [2023-08-30 20:12:38,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 2216 transitions, 39734 flow. Second operand has 47 states, 47 states have (on average 88.53191489361703) internal successors, (4161), 47 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:38,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:12:38,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 267 [2023-08-30 20:12:38,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:03,345 INFO L130 PetriNetUnfolder]: 16948/28924 cut-off events. [2023-08-30 20:13:03,346 INFO L131 PetriNetUnfolder]: For 1043002/1043002 co-relation queries the response was YES. [2023-08-30 20:13:04,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227231 conditions, 28924 events. 16948/28924 cut-off events. For 1043002/1043002 co-relation queries the response was YES. Maximal size of possible extension queue 1114. Compared 230308 event pairs, 690 based on Foata normal form. 62/28986 useless extension candidates. Maximal degree in co-relation 227047. Up to 10689 conditions per place. [2023-08-30 20:13:04,286 INFO L137 encePairwiseOnDemand]: 258/267 looper letters, 1167 selfloop transitions, 2639 changer transitions 130/3936 dead transitions. [2023-08-30 20:13:04,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 3936 transitions, 78055 flow [2023-08-30 20:13:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-30 20:13:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-08-30 20:13:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 10257 transitions. [2023-08-30 20:13:04,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3429975922953451 [2023-08-30 20:13:04,300 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 10257 transitions. [2023-08-30 20:13:04,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 10257 transitions. [2023-08-30 20:13:04,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:04,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 10257 transitions. [2023-08-30 20:13:04,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 91.58035714285714) internal successors, (10257), 112 states have internal predecessors, (10257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:04,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 267.0) internal successors, (30171), 113 states have internal predecessors, (30171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:04,348 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 267.0) internal successors, (30171), 113 states have internal predecessors, (30171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:04,349 INFO L175 Difference]: Start difference. First operand has 613 places, 2216 transitions, 39734 flow. Second operand 112 states and 10257 transitions. [2023-08-30 20:13:04,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 3936 transitions, 78055 flow [2023-08-30 20:13:25,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 3936 transitions, 70732 flow, removed 3580 selfloop flow, removed 32 redundant places. [2023-08-30 20:13:25,219 INFO L231 Difference]: Finished difference. Result has 745 places, 3281 transitions, 64618 flow [2023-08-30 20:13:25,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=36678, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=64618, PETRI_PLACES=745, PETRI_TRANSITIONS=3281} [2023-08-30 20:13:25,221 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 723 predicate places. [2023-08-30 20:13:25,221 INFO L495 AbstractCegarLoop]: Abstraction has has 745 places, 3281 transitions, 64618 flow [2023-08-30 20:13:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 88.53191489361703) internal successors, (4161), 47 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:25,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:25,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:25,228 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 20:13:25,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:13:25,428 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 20:13:25,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1162124930, now seen corresponding path program 14 times [2023-08-30 20:13:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:25,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160618486] [2023-08-30 20:13:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:25,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:13:25,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:25,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160618486] [2023-08-30 20:13:25,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160618486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:25,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853738837] [2023-08-30 20:13:25,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:13:25,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:25,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:25,690 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 20:13:25,691 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 20:13:25,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:13:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:13:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:13:26,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:27,260 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-30 20:13:27,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 299 treesize of output 197 [2023-08-30 20:13:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:13:27,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853738837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:27,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:27,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2023-08-30 20:13:27,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266379490] [2023-08-30 20:13:27,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:27,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:13:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:13:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-08-30 20:13:28,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 267 [2023-08-30 20:13:28,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 3281 transitions, 64618 flow. Second operand has 28 states, 28 states have (on average 97.0) internal successors, (2716), 28 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:28,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 267 [2023-08-30 20:13:28,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:42,159 INFO L130 PetriNetUnfolder]: 10274/17906 cut-off events. [2023-08-30 20:13:42,159 INFO L131 PetriNetUnfolder]: For 770759/770759 co-relation queries the response was YES. [2023-08-30 20:13:42,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148817 conditions, 17906 events. 10274/17906 cut-off events. For 770759/770759 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 141758 event pairs, 1126 based on Foata normal form. 744/18650 useless extension candidates. Maximal degree in co-relation 148584. Up to 5573 conditions per place. [2023-08-30 20:13:42,499 INFO L137 encePairwiseOnDemand]: 258/267 looper letters, 981 selfloop transitions, 1235 changer transitions 20/2236 dead transitions. [2023-08-30 20:13:42,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 2236 transitions, 48121 flow [2023-08-30 20:13:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 20:13:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 20:13:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5491 transitions. [2023-08-30 20:13:42,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739189649302009 [2023-08-30 20:13:42,503 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5491 transitions. [2023-08-30 20:13:42,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5491 transitions. [2023-08-30 20:13:42,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:42,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5491 transitions. [2023-08-30 20:13:42,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 99.83636363636364) internal successors, (5491), 55 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:42,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 267.0) internal successors, (14952), 56 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:42,523 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 267.0) internal successors, (14952), 56 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:42,523 INFO L175 Difference]: Start difference. First operand has 745 places, 3281 transitions, 64618 flow. Second operand 55 states and 5491 transitions. [2023-08-30 20:13:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 2236 transitions, 48121 flow [2023-08-30 20:13:54,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2236 transitions, 45612 flow, removed 938 selfloop flow, removed 147 redundant places. [2023-08-30 20:13:54,440 INFO L231 Difference]: Finished difference. Result has 537 places, 1802 transitions, 39127 flow [2023-08-30 20:13:54,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=23090, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=720, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=39127, PETRI_PLACES=537, PETRI_TRANSITIONS=1802} [2023-08-30 20:13:54,442 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 515 predicate places. [2023-08-30 20:13:54,442 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1802 transitions, 39127 flow [2023-08-30 20:13:54,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.0) internal successors, (2716), 28 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:54,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:54,443 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:54,449 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 20:13:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:54,649 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 20:13:54,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash -423606935, now seen corresponding path program 15 times [2023-08-30 20:13:54,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415008115] [2023-08-30 20:13:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:13:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415008115] [2023-08-30 20:13:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415008115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297785731] [2023-08-30 20:13:57,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:13:57,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:57,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:57,132 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 20:13:57,134 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 20:13:57,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:13:57,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:57,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:13:57,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:58,022 INFO L321 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2023-08-30 20:13:58,022 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 50 treesize of output 18 [2023-08-30 20:13:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:13:58,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:59,293 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-08-30 20:13:59,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 220 [2023-08-30 20:13:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:13:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297785731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:59,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 12] total 43 [2023-08-30 20:13:59,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423863054] [2023-08-30 20:13:59,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:59,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 20:13:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 20:13:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 20:14:02,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 267 [2023-08-30 20:14:02,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1802 transitions, 39127 flow. Second operand has 45 states, 45 states have (on average 85.64444444444445) internal successors, (3854), 45 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:02,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:02,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 267 [2023-08-30 20:14:02,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:26,668 INFO L130 PetriNetUnfolder]: 14994/25927 cut-off events. [2023-08-30 20:14:26,668 INFO L131 PetriNetUnfolder]: For 490708/490708 co-relation queries the response was YES. [2023-08-30 20:14:27,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199270 conditions, 25927 events. 14994/25927 cut-off events. For 490708/490708 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 216375 event pairs, 530 based on Foata normal form. 65/25992 useless extension candidates. Maximal degree in co-relation 199123. Up to 8462 conditions per place. [2023-08-30 20:14:27,452 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 695 selfloop transitions, 2396 changer transitions 98/3189 dead transitions. [2023-08-30 20:14:27,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 3189 transitions, 71472 flow [2023-08-30 20:14:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-30 20:14:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-08-30 20:14:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 9888 transitions. [2023-08-30 20:14:27,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306581059390048 [2023-08-30 20:14:27,459 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 9888 transitions. [2023-08-30 20:14:27,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 9888 transitions. [2023-08-30 20:14:27,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:27,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 9888 transitions. [2023-08-30 20:14:27,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 88.28571428571429) internal successors, (9888), 112 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 267.0) internal successors, (30171), 113 states have internal predecessors, (30171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,498 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 267.0) internal successors, (30171), 113 states have internal predecessors, (30171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,499 INFO L175 Difference]: Start difference. First operand has 537 places, 1802 transitions, 39127 flow. Second operand 112 states and 9888 transitions. [2023-08-30 20:14:27,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 3189 transitions, 71472 flow [2023-08-30 20:14:42,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 3189 transitions, 67105 flow, removed 1679 selfloop flow, removed 81 redundant places. [2023-08-30 20:14:43,033 INFO L231 Difference]: Finished difference. Result has 598 places, 2788 transitions, 66988 flow [2023-08-30 20:14:43,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=35437, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=66988, PETRI_PLACES=598, PETRI_TRANSITIONS=2788} [2023-08-30 20:14:43,035 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2023-08-30 20:14:43,035 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 2788 transitions, 66988 flow [2023-08-30 20:14:43,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 85.64444444444445) internal successors, (3854), 45 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:43,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:43,036 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:43,044 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 20:14:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 20:14:43,242 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 20:14:43,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash -94110327, now seen corresponding path program 16 times [2023-08-30 20:14:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:43,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143935749] [2023-08-30 20:14:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143935749] [2023-08-30 20:14:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143935749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51740963] [2023-08-30 20:14:45,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:14:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:45,344 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 20:14:45,346 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 20:14:45,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:14:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 20:14:45,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:45,996 INFO L321 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2023-08-30 20:14:45,997 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 50 treesize of output 18 [2023-08-30 20:14:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:46,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:47,258 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 20:14:47,258 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 316 treesize of output 256 [2023-08-30 20:14:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:14:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51740963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:47,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 12] total 43 [2023-08-30 20:14:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074909998] [2023-08-30 20:14:47,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:48,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 20:14:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 20:14:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1647, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 20:14:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-08-30 20:14:50,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 2788 transitions, 66988 flow. Second operand has 45 states, 45 states have (on average 90.64444444444445) internal successors, (4079), 45 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:50,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:50,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-08-30 20:14:50,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:15,031 INFO L130 PetriNetUnfolder]: 17854/30713 cut-off events. [2023-08-30 20:15:15,032 INFO L131 PetriNetUnfolder]: For 497575/497575 co-relation queries the response was YES. [2023-08-30 20:15:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246182 conditions, 30713 events. 17854/30713 cut-off events. For 497575/497575 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 259277 event pairs, 432 based on Foata normal form. 41/30754 useless extension candidates. Maximal degree in co-relation 246054. Up to 10645 conditions per place. [2023-08-30 20:15:15,784 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 1314 selfloop transitions, 2585 changer transitions 81/3980 dead transitions. [2023-08-30 20:15:15,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 3980 transitions, 96336 flow [2023-08-30 20:15:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-30 20:15:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-30 20:15:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 9214 transitions. [2023-08-30 20:15:15,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485794272311126 [2023-08-30 20:15:15,791 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 9214 transitions. [2023-08-30 20:15:15,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 9214 transitions. [2023-08-30 20:15:15,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:15,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 9214 transitions. [2023-08-30 20:15:15,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 93.07070707070707) internal successors, (9214), 99 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 267.0) internal successors, (26700), 100 states have internal predecessors, (26700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,822 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 267.0) internal successors, (26700), 100 states have internal predecessors, (26700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,822 INFO L175 Difference]: Start difference. First operand has 598 places, 2788 transitions, 66988 flow. Second operand 99 states and 9214 transitions. [2023-08-30 20:15:15,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 3980 transitions, 96336 flow [2023-08-30 20:15:31,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 3980 transitions, 94279 flow, removed 958 selfloop flow, removed 27 redundant places. [2023-08-30 20:15:31,202 INFO L231 Difference]: Finished difference. Result has 687 places, 3333 transitions, 87395 flow [2023-08-30 20:15:31,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=65449, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=87395, PETRI_PLACES=687, PETRI_TRANSITIONS=3333} [2023-08-30 20:15:31,204 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 665 predicate places. [2023-08-30 20:15:31,205 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 3333 transitions, 87395 flow [2023-08-30 20:15:31,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 90.64444444444445) internal successors, (4079), 45 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:31,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:31,205 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:31,210 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 20:15:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:31,406 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 20:15:31,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1575467589, now seen corresponding path program 17 times [2023-08-30 20:15:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021456640] [2023-08-30 20:15:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:31,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021456640] [2023-08-30 20:15:33,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021456640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:33,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13827581] [2023-08-30 20:15:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:15:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:33,290 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 20:15:33,291 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 20:15:33,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:15:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:33,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 20:15:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:34,023 INFO L321 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2023-08-30 20:15:34,024 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 50 treesize of output 18 [2023-08-30 20:15:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:15:34,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:35,191 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 20:15:35,192 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 316 treesize of output 256 [2023-08-30 20:15:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:15:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13827581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:35,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:35,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 12] total 43 [2023-08-30 20:15:35,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189484330] [2023-08-30 20:15:35,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:35,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 20:15:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 20:15:35,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 20:15:38,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-08-30 20:15:38,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 3333 transitions, 87395 flow. Second operand has 45 states, 45 states have (on average 90.64444444444445) internal successors, (4079), 45 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:38,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:38,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-08-30 20:15:38,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:18,045 INFO L130 PetriNetUnfolder]: 25784/44114 cut-off events. [2023-08-30 20:16:18,046 INFO L131 PetriNetUnfolder]: For 943616/943616 co-relation queries the response was YES. [2023-08-30 20:16:19,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382409 conditions, 44114 events. 25784/44114 cut-off events. For 943616/943616 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 381416 event pairs, 600 based on Foata normal form. 140/44254 useless extension candidates. Maximal degree in co-relation 382259. Up to 14971 conditions per place. [2023-08-30 20:16:19,749 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 1459 selfloop transitions, 3810 changer transitions 158/5427 dead transitions. [2023-08-30 20:16:19,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 5427 transitions, 145155 flow [2023-08-30 20:16:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-08-30 20:16:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-08-30 20:16:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 9190 transitions. [2023-08-30 20:16:19,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3512191393411297 [2023-08-30 20:16:19,754 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 9190 transitions. [2023-08-30 20:16:19,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 9190 transitions. [2023-08-30 20:16:19,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:19,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 9190 transitions. [2023-08-30 20:16:19,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 93.77551020408163) internal successors, (9190), 98 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:19,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 267.0) internal successors, (26433), 99 states have internal predecessors, (26433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:20,002 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 267.0) internal successors, (26433), 99 states have internal predecessors, (26433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:20,002 INFO L175 Difference]: Start difference. First operand has 687 places, 3333 transitions, 87395 flow. Second operand 98 states and 9190 transitions. [2023-08-30 20:16:20,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 5427 transitions, 145155 flow [2023-08-30 20:16:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 5427 transitions, 143724 flow, removed 398 selfloop flow, removed 36 redundant places. [2023-08-30 20:16:53,192 INFO L231 Difference]: Finished difference. Result has 772 places, 4540 transitions, 134825 flow [2023-08-30 20:16:53,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=83690, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=134825, PETRI_PLACES=772, PETRI_TRANSITIONS=4540} [2023-08-30 20:16:53,194 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 750 predicate places. [2023-08-30 20:16:53,194 INFO L495 AbstractCegarLoop]: Abstraction has has 772 places, 4540 transitions, 134825 flow [2023-08-30 20:16:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 90.64444444444445) internal successors, (4079), 45 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:53,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:53,195 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:53,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:53,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:53,396 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 20:16:53,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1634018524, now seen corresponding path program 18 times [2023-08-30 20:16:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:53,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950171940] [2023-08-30 20:16:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:16:53,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:53,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950171940] [2023-08-30 20:16:53,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950171940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:53,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073111581] [2023-08-30 20:16:53,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:16:53,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:53,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:53,609 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 20:16:53,613 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 20:16:53,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 20:16:53,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 20:16:53,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:54,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:54,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 12 [2023-08-30 20:16:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:16:54,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:54,688 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 20:16:54,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 187 [2023-08-30 20:16:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:16:54,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073111581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:54,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:54,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2023-08-30 20:16:54,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001453335] [2023-08-30 20:16:54,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:54,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:16:54,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:16:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:16:55,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 267 [2023-08-30 20:16:55,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 772 places, 4540 transitions, 134825 flow. Second operand has 22 states, 22 states have (on average 100.9090909090909) internal successors, (2220), 22 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:55,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:55,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 267 [2023-08-30 20:16:55,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:36,706 INFO L130 PetriNetUnfolder]: 23210/39758 cut-off events. [2023-08-30 20:17:36,706 INFO L131 PetriNetUnfolder]: For 1080009/1080009 co-relation queries the response was YES. [2023-08-30 20:17:37,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376560 conditions, 39758 events. 23210/39758 cut-off events. For 1080009/1080009 co-relation queries the response was YES. Maximal size of possible extension queue 2145. Compared 344897 event pairs, 500 based on Foata normal form. 356/40114 useless extension candidates. Maximal degree in co-relation 376384. Up to 14498 conditions per place. [2023-08-30 20:17:37,864 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 551 selfloop transitions, 3643 changer transitions 269/4463 dead transitions. [2023-08-30 20:17:37,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 4463 transitions, 139983 flow [2023-08-30 20:17:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:17:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:17:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2271 transitions. [2023-08-30 20:17:37,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38661899897854957 [2023-08-30 20:17:37,867 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2271 transitions. [2023-08-30 20:17:37,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2271 transitions. [2023-08-30 20:17:37,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:37,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2271 transitions. [2023-08-30 20:17:37,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 103.22727272727273) internal successors, (2271), 22 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:37,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 267.0) internal successors, (6141), 23 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:37,871 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 267.0) internal successors, (6141), 23 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:37,871 INFO L175 Difference]: Start difference. First operand has 772 places, 4540 transitions, 134825 flow. Second operand 22 states and 2271 transitions. [2023-08-30 20:17:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 4463 transitions, 139983 flow [2023-08-30 20:18:26,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 4463 transitions, 136460 flow, removed 768 selfloop flow, removed 39 redundant places. [2023-08-30 20:18:26,109 INFO L231 Difference]: Finished difference. Result has 719 places, 4114 transitions, 129909 flow [2023-08-30 20:18:26,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=119712, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=129909, PETRI_PLACES=719, PETRI_TRANSITIONS=4114} [2023-08-30 20:18:26,112 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 697 predicate places. [2023-08-30 20:18:26,112 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 4114 transitions, 129909 flow [2023-08-30 20:18:26,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.9090909090909) internal successors, (2220), 22 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:26,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:26,113 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:26,119 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 20:18:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:26,318 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 20:18:26,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1099413833, now seen corresponding path program 19 times [2023-08-30 20:18:26,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:26,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665254132] [2023-08-30 20:18:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:26,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:18:26,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665254132] [2023-08-30 20:18:26,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665254132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888326198] [2023-08-30 20:18:26,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:18:26,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:26,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:26,541 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 20:18:26,546 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 20:18:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 20:18:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:18:27,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:27,896 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-08-30 20:18:27,896 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 271 treesize of output 187 [2023-08-30 20:18:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:18:27,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888326198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:27,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:27,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 20:18:27,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117662422] [2023-08-30 20:18:27,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:18:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:27,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:18:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:18:28,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 267 [2023-08-30 20:18:28,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 4114 transitions, 129909 flow. Second operand has 24 states, 24 states have (on average 103.04166666666667) internal successors, (2473), 24 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:28,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:28,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 267 [2023-08-30 20:18:28,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:19:02,327 INFO L130 PetriNetUnfolder]: 21912/37214 cut-off events. [2023-08-30 20:19:02,327 INFO L131 PetriNetUnfolder]: For 1127307/1127349 co-relation queries the response was YES. [2023-08-30 20:19:03,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370277 conditions, 37214 events. 21912/37214 cut-off events. For 1127307/1127349 co-relation queries the response was YES. Maximal size of possible extension queue 2052. Compared 315216 event pairs, 11238 based on Foata normal form. 22/37194 useless extension candidates. Maximal degree in co-relation 370118. Up to 36864 conditions per place. [2023-08-30 20:19:03,757 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 4021 selfloop transitions, 5 changer transitions 55/4094 dead transitions. [2023-08-30 20:19:03,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 4094 transitions, 137289 flow [2023-08-30 20:19:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:19:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:19:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1052 transitions. [2023-08-30 20:19:03,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940074906367041 [2023-08-30 20:19:03,758 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1052 transitions. [2023-08-30 20:19:03,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1052 transitions. [2023-08-30 20:19:03,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:19:03,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1052 transitions. [2023-08-30 20:19:03,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.2) internal successors, (1052), 10 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:03,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:03,760 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:03,760 INFO L175 Difference]: Start difference. First operand has 719 places, 4114 transitions, 129909 flow. Second operand 10 states and 1052 transitions. [2023-08-30 20:19:03,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 4094 transitions, 137289 flow [2023-08-30 20:19:44,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 4094 transitions, 132118 flow, removed 881 selfloop flow, removed 29 redundant places. [2023-08-30 20:19:44,826 INFO L231 Difference]: Finished difference. Result has 596 places, 4039 transitions, 123174 flow [2023-08-30 20:19:44,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=123939, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4079, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=123174, PETRI_PLACES=596, PETRI_TRANSITIONS=4039} [2023-08-30 20:19:44,829 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 574 predicate places. [2023-08-30 20:19:44,829 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 4039 transitions, 123174 flow [2023-08-30 20:19:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 103.04166666666667) internal successors, (2473), 24 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:44,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:19:44,829 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:19:44,833 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 20:19:45,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:45,030 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 20:19:45,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:19:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash -934146126, now seen corresponding path program 20 times [2023-08-30 20:19:45,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:19:45,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924965931] [2023-08-30 20:19:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:19:45,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:19:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:19:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:46,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:19:46,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924965931] [2023-08-30 20:19:46,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924965931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:19:46,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098789529] [2023-08-30 20:19:46,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:19:46,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:46,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:19:46,939 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 20:19:46,941 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 20:19:47,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:19:47,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:19:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 20:19:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:19:48,049 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2023-08-30 20:19:48,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 23 [2023-08-30 20:19:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:48,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:19:49,741 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-08-30 20:19:49,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 358 treesize of output 302 [2023-08-30 20:19:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:52,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098789529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:19:52,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:19:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 59 [2023-08-30 20:19:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931961192] [2023-08-30 20:19:52,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:19:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-08-30 20:19:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:19:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-08-30 20:19:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=3207, Unknown=0, NotChecked=0, Total=3660 [2023-08-30 20:19:55,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 267 [2023-08-30 20:19:55,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 4039 transitions, 123174 flow. Second operand has 61 states, 61 states have (on average 88.40983606557377) internal successors, (5393), 61 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:55,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:19:55,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 267 [2023-08-30 20:19:55,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:44,732 INFO L130 PetriNetUnfolder]: 24862/42114 cut-off events. [2023-08-30 20:20:44,733 INFO L131 PetriNetUnfolder]: For 1191050/1191050 co-relation queries the response was YES. [2023-08-30 20:20:46,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405855 conditions, 42114 events. 24862/42114 cut-off events. For 1191050/1191050 co-relation queries the response was YES. Maximal size of possible extension queue 2296. Compared 364401 event pairs, 560 based on Foata normal form. 7/42121 useless extension candidates. Maximal degree in co-relation 405707. Up to 16273 conditions per place. [2023-08-30 20:20:46,269 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 1149 selfloop transitions, 3756 changer transitions 90/4995 dead transitions. [2023-08-30 20:20:46,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 4995 transitions, 154219 flow [2023-08-30 20:20:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-30 20:20:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-30 20:20:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8800 transitions. [2023-08-30 20:20:46,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33978145874358084 [2023-08-30 20:20:46,275 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8800 transitions. [2023-08-30 20:20:46,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8800 transitions. [2023-08-30 20:20:46,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:46,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8800 transitions. [2023-08-30 20:20:46,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 90.72164948453609) internal successors, (8800), 97 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:46,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 267.0) internal successors, (26166), 98 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:46,302 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 267.0) internal successors, (26166), 98 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:46,302 INFO L175 Difference]: Start difference. First operand has 596 places, 4039 transitions, 123174 flow. Second operand 97 states and 8800 transitions. [2023-08-30 20:20:46,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 4995 transitions, 154219 flow [2023-08-30 20:21:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 4995 transitions, 153797 flow, removed 180 selfloop flow, removed 10 redundant places. [2023-08-30 20:21:32,237 INFO L231 Difference]: Finished difference. Result has 653 places, 4495 transitions, 149433 flow [2023-08-30 20:21:32,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=122778, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=149433, PETRI_PLACES=653, PETRI_TRANSITIONS=4495} [2023-08-30 20:21:32,241 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 631 predicate places. [2023-08-30 20:21:32,242 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 4495 transitions, 149433 flow [2023-08-30 20:21:32,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 88.40983606557377) internal successors, (5393), 61 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:32,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:32,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:32,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-30 20:21:32,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 20:21:32,450 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 20:21:32,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1406374882, now seen corresponding path program 21 times [2023-08-30 20:21:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:32,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935751317] [2023-08-30 20:21:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:32,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:34,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935751317] [2023-08-30 20:21:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935751317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509184451] [2023-08-30 20:21:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:21:34,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:34,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:34,677 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 20:21:34,681 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 20:21:35,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 20:21:35,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-30 20:21:35,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:35,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:21:35,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:21:35,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:21:35,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:21:36,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:36,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:36,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:36,267 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:36,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:36,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:36,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:36,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 35 [2023-08-30 20:21:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:36,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:40,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:40,361 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 2 case distinctions, treesize of input 306 treesize of output 171 [2023-08-30 20:21:40,413 INFO L321 Elim1Store]: treesize reduction 160, result has 11.6 percent of original size [2023-08-30 20:21:40,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 490 treesize of output 441 [2023-08-30 20:21:40,475 INFO L321 Elim1Store]: treesize reduction 160, result has 11.6 percent of original size [2023-08-30 20:21:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 421 treesize of output 335 [2023-08-30 20:21:40,538 INFO L321 Elim1Store]: treesize reduction 160, result has 11.6 percent of original size [2023-08-30 20:21:40,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 284 treesize of output 251 [2023-08-30 20:21:41,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:41,167 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 2 case distinctions, treesize of input 306 treesize of output 171 [2023-08-30 20:21:41,249 INFO L321 Elim1Store]: treesize reduction 164, result has 9.4 percent of original size [2023-08-30 20:21:41,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1030 treesize of output 908 [2023-08-30 20:21:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:41,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:41,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:41,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:41,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:41,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:41,302 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:21:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:21:41,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 286 [2023-08-30 20:21:41,371 INFO L321 Elim1Store]: treesize reduction 164, result has 9.4 percent of original size [2023-08-30 20:21:41,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 337 treesize of output 247 [2023-08-30 20:21:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509184451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:41,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:41,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 61 [2023-08-30 20:21:41,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321743517] [2023-08-30 20:21:41,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:41,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 20:21:41,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 20:21:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=3103, Unknown=17, NotChecked=0, Total=3906 [2023-08-30 20:21:42,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-08-30 20:21:42,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 4495 transitions, 149433 flow. Second operand has 63 states, 63 states have (on average 67.36507936507937) internal successors, (4244), 63 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:42,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:42,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-08-30 20:21:42,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15