./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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 ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:19:18,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:19:18,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:19:18,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:19:18,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:19:18,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:19:18,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:19:18,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:19:18,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:19:18,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:19:18,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:19:18,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:19:18,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:19:18,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:19:18,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:19:18,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:19:18,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:19:18,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:19:18,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:19:18,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:19:18,174 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:19:18,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:19:18,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:19:18,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:19:18,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:19:18,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:19:18,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:19:18,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:19:18,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:19:18,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:19:18,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:19:18,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:19:18,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:19:18,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:19:18,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:19:18,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:19:18,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:19:18,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:19:18,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:19:18,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:19:18,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:19:18,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:19:18,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:19:18,216 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:19:18,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:19:18,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:19:18,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:19:18,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:19:18,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:19:18,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:19:18,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:19:18,219 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:19:18,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:19:18,220 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:19:18,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:19:18,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:19:18,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:19:18,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:19:18,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:19:18,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:19:18,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:19:18,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:19:18,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:19:18,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:19:18,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:19:18,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:19:18,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:19:18,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:19:18,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:19:18,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:19:18,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:19:18,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:19:18,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:19:18,224 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:19:18,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:19:18,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:19:18,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-07-12 10:19:18,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:19:18,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:19:18,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:19:18,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:19:18,458 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:19:18,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-07-12 10:19:18,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa96be15/ebb3beb0bbc149a6b820df7ca03ecb67/FLAGb14d24e0c [2022-07-12 10:19:18,829 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:19:18,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-07-12 10:19:18,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa96be15/ebb3beb0bbc149a6b820df7ca03ecb67/FLAGb14d24e0c [2022-07-12 10:19:18,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa96be15/ebb3beb0bbc149a6b820df7ca03ecb67 [2022-07-12 10:19:18,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:19:18,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:19:18,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:19:18,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:19:18,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:19:18,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:19:18" (1/1) ... [2022-07-12 10:19:18,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c26f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:18, skipping insertion in model container [2022-07-12 10:19:18,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:19:18" (1/1) ... [2022-07-12 10:19:18,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:19:18,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:19:19,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-07-12 10:19:19,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:19:19,050 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:19:19,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-07-12 10:19:19,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:19:19,092 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:19:19,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19 WrapperNode [2022-07-12 10:19:19,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:19:19,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:19:19,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:19:19,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:19:19,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,131 INFO L137 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2022-07-12 10:19:19,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:19:19,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:19:19,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:19:19,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:19:19,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:19:19,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:19:19,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:19:19,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:19:19,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (1/1) ... [2022-07-12 10:19:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:19:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:19,230 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) [2022-07-12 10:19:19,265 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 [2022-07-12 10:19:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:19:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:19:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:19:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:19:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:19:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:19:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:19:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:19:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:19:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:19:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:19:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:19:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:19:19,284 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:19:19,334 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:19:19,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:19:19,567 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:19:19,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:19:19,574 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:19:19,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:19:19 BoogieIcfgContainer [2022-07-12 10:19:19,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:19:19,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:19:19,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:19:19,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:19:19,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:19:18" (1/3) ... [2022-07-12 10:19:19,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5d2dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:19:19, skipping insertion in model container [2022-07-12 10:19:19,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:19" (2/3) ... [2022-07-12 10:19:19,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5d2dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:19:19, skipping insertion in model container [2022-07-12 10:19:19,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:19:19" (3/3) ... [2022-07-12 10:19:19,588 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-07-12 10:19:19,592 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:19:19,598 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:19:19,599 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:19:19,599 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:19:19,646 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:19:19,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 364 flow [2022-07-12 10:19:19,739 INFO L129 PetriNetUnfolder]: 15/172 cut-off events. [2022-07-12 10:19:19,739 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:19:19,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 15/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2022-07-12 10:19:19,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 174 transitions, 364 flow [2022-07-12 10:19:19,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2022-07-12 10:19:19,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:19,781 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a061ee4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3683d497 [2022-07-12 10:19:19,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:19:19,803 INFO L129 PetriNetUnfolder]: 15/162 cut-off events. [2022-07-12 10:19:19,816 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:19:19,817 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:19,818 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:19,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:19,822 INFO L85 PathProgramCache]: Analyzing trace with hash -425245189, now seen corresponding path program 1 times [2022-07-12 10:19:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721170808] [2022-07-12 10:19:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:19,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:20,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:20,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721170808] [2022-07-12 10:19:20,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721170808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:20,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:20,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:19:20,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962684167] [2022-07-12 10:19:20,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:20,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:19:20,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:19:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:19:20,042 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 174 [2022-07-12 10:19:20,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:20,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 174 [2022-07-12 10:19:20,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:20,098 INFO L129 PetriNetUnfolder]: 6/154 cut-off events. [2022-07-12 10:19:20,098 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:19:20,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 154 events. 6/154 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 11/154 useless extension candidates. Maximal degree in co-relation 125. Up to 5 conditions per place. [2022-07-12 10:19:20,100 INFO L132 encePairwiseOnDemand]: 165/174 looper letters, 4 selfloop transitions, 0 changer transitions 5/154 dead transitions. [2022-07-12 10:19:20,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 328 flow [2022-07-12 10:19:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:19:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:19:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2022-07-12 10:19:20,108 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9568965517241379 [2022-07-12 10:19:20,109 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2022-07-12 10:19:20,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2022-07-12 10:19:20,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:20,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2022-07-12 10:19:20,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,120 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,122 INFO L186 Difference]: Start difference. First operand has 155 places, 163 transitions, 338 flow. Second operand 2 states and 333 transitions. [2022-07-12 10:19:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 328 flow [2022-07-12 10:19:20,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 154 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:19:20,130 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 302 flow [2022-07-12 10:19:20,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=302, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-07-12 10:19:20,134 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -3 predicate places. [2022-07-12 10:19:20,134 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 302 flow [2022-07-12 10:19:20,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,143 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:20,143 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:20,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:19:20,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2116646914, now seen corresponding path program 1 times [2022-07-12 10:19:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:20,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630806110] [2022-07-12 10:19:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:20,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:20,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630806110] [2022-07-12 10:19:20,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630806110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:20,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:20,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:19:20,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731422405] [2022-07-12 10:19:20,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:20,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:19:20,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:19:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:19:20,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2022-07-12 10:19:20,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:20,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2022-07-12 10:19:20,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:20,652 INFO L129 PetriNetUnfolder]: 171/632 cut-off events. [2022-07-12 10:19:20,653 INFO L130 PetriNetUnfolder]: For 22/34 co-relation queries the response was YES. [2022-07-12 10:19:20,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 632 events. 171/632 cut-off events. For 22/34 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3089 event pairs, 41 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 961. Up to 122 conditions per place. [2022-07-12 10:19:20,658 INFO L132 encePairwiseOnDemand]: 167/174 looper letters, 65 selfloop transitions, 5 changer transitions 4/185 dead transitions. [2022-07-12 10:19:20,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 185 transitions, 527 flow [2022-07-12 10:19:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:19:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:19:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2022-07-12 10:19:20,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2022-07-12 10:19:20,664 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2022-07-12 10:19:20,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2022-07-12 10:19:20,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:20,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2022-07-12 10:19:20,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,671 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,672 INFO L186 Difference]: Start difference. First operand has 152 places, 149 transitions, 302 flow. Second operand 6 states and 801 transitions. [2022-07-12 10:19:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 185 transitions, 527 flow [2022-07-12 10:19:20,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:20,679 INFO L242 Difference]: Finished difference. Result has 155 places, 152 transitions, 331 flow [2022-07-12 10:19:20,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2022-07-12 10:19:20,680 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-07-12 10:19:20,681 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 331 flow [2022-07-12 10:19:20,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:20,682 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:20,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:19:20,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash 336168701, now seen corresponding path program 1 times [2022-07-12 10:19:20,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:20,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578976700] [2022-07-12 10:19:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:20,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:20,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578976700] [2022-07-12 10:19:20,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578976700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:20,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:20,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:19:20,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098358434] [2022-07-12 10:19:20,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:20,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:19:20,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:20,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:19:20,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:19:20,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-12 10:19:20,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:20,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-12 10:19:20,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:20,956 INFO L129 PetriNetUnfolder]: 119/657 cut-off events. [2022-07-12 10:19:20,956 INFO L130 PetriNetUnfolder]: For 39/50 co-relation queries the response was YES. [2022-07-12 10:19:20,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 657 events. 119/657 cut-off events. For 39/50 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3077 event pairs, 44 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 972. Up to 97 conditions per place. [2022-07-12 10:19:20,960 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 63 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2022-07-12 10:19:20,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 188 transitions, 569 flow [2022-07-12 10:19:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:19:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:19:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1317 transitions. [2022-07-12 10:19:20,964 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.756896551724138 [2022-07-12 10:19:20,964 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1317 transitions. [2022-07-12 10:19:20,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1317 transitions. [2022-07-12 10:19:20,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:20,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1317 transitions. [2022-07-12 10:19:20,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,971 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,971 INFO L186 Difference]: Start difference. First operand has 155 places, 152 transitions, 331 flow. Second operand 10 states and 1317 transitions. [2022-07-12 10:19:20,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 188 transitions, 569 flow [2022-07-12 10:19:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 188 transitions, 565 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-12 10:19:20,977 INFO L242 Difference]: Finished difference. Result has 163 places, 157 transitions, 388 flow [2022-07-12 10:19:20,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=388, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2022-07-12 10:19:20,979 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 8 predicate places. [2022-07-12 10:19:20,979 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 388 flow [2022-07-12 10:19:20,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:20,980 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:20,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:19:20,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash -506615031, now seen corresponding path program 1 times [2022-07-12 10:19:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:20,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104107090] [2022-07-12 10:19:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:20,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:21,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:21,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104107090] [2022-07-12 10:19:21,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104107090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:21,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:21,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:19:21,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546886507] [2022-07-12 10:19:21,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:21,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:19:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:19:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:19:21,147 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-12 10:19:21,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 388 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:21,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-12 10:19:21,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:21,279 INFO L129 PetriNetUnfolder]: 105/629 cut-off events. [2022-07-12 10:19:21,279 INFO L130 PetriNetUnfolder]: For 88/97 co-relation queries the response was YES. [2022-07-12 10:19:21,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 629 events. 105/629 cut-off events. For 88/97 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2949 event pairs, 32 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 974. Up to 87 conditions per place. [2022-07-12 10:19:21,283 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 46 selfloop transitions, 11 changer transitions 19/187 dead transitions. [2022-07-12 10:19:21,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 187 transitions, 611 flow [2022-07-12 10:19:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:19:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:19:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1316 transitions. [2022-07-12 10:19:21,293 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7563218390804598 [2022-07-12 10:19:21,293 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1316 transitions. [2022-07-12 10:19:21,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1316 transitions. [2022-07-12 10:19:21,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:21,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1316 transitions. [2022-07-12 10:19:21,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.6) internal successors, (1316), 10 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,299 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,299 INFO L186 Difference]: Start difference. First operand has 163 places, 157 transitions, 388 flow. Second operand 10 states and 1316 transitions. [2022-07-12 10:19:21,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 187 transitions, 611 flow [2022-07-12 10:19:21,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 187 transitions, 603 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:19:21,302 INFO L242 Difference]: Finished difference. Result has 170 places, 154 transitions, 393 flow [2022-07-12 10:19:21,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=170, PETRI_TRANSITIONS=154} [2022-07-12 10:19:21,303 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 15 predicate places. [2022-07-12 10:19:21,304 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 154 transitions, 393 flow [2022-07-12 10:19:21,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:21,304 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:21,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:19:21,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:21,305 INFO L85 PathProgramCache]: Analyzing trace with hash 131354636, now seen corresponding path program 1 times [2022-07-12 10:19:21,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:21,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588852347] [2022-07-12 10:19:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:21,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:19:21,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:21,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588852347] [2022-07-12 10:19:21,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588852347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:21,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:21,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:19:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140958454] [2022-07-12 10:19:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:21,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:19:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:19:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:19:21,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-12 10:19:21,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 154 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:21,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-12 10:19:21,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:21,525 INFO L129 PetriNetUnfolder]: 118/629 cut-off events. [2022-07-12 10:19:21,526 INFO L130 PetriNetUnfolder]: For 137/148 co-relation queries the response was YES. [2022-07-12 10:19:21,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 629 events. 118/629 cut-off events. For 137/148 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2982 event pairs, 44 based on Foata normal form. 7/589 useless extension candidates. Maximal degree in co-relation 1019. Up to 97 conditions per place. [2022-07-12 10:19:21,529 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 56 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2022-07-12 10:19:21,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 177 transitions, 587 flow [2022-07-12 10:19:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:19:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:19:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2022-07-12 10:19:21,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7593390804597702 [2022-07-12 10:19:21,532 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2022-07-12 10:19:21,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2022-07-12 10:19:21,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:21,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2022-07-12 10:19:21,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,536 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,536 INFO L186 Difference]: Start difference. First operand has 170 places, 154 transitions, 393 flow. Second operand 8 states and 1057 transitions. [2022-07-12 10:19:21,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 177 transitions, 587 flow [2022-07-12 10:19:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 177 transitions, 552 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-07-12 10:19:21,540 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 398 flow [2022-07-12 10:19:21,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2022-07-12 10:19:21,541 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 10 predicate places. [2022-07-12 10:19:21,541 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 398 flow [2022-07-12 10:19:21,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:21,542 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:21,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:19:21,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:21,543 INFO L85 PathProgramCache]: Analyzing trace with hash -679366620, now seen corresponding path program 1 times [2022-07-12 10:19:21,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058185217] [2022-07-12 10:19:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:19:21,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058185217] [2022-07-12 10:19:21,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058185217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:21,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:21,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:19:21,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707251195] [2022-07-12 10:19:21,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:21,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:19:21,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:19:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:19:21,626 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-12 10:19:21,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:21,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-12 10:19:21,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:21,751 INFO L129 PetriNetUnfolder]: 104/601 cut-off events. [2022-07-12 10:19:21,752 INFO L130 PetriNetUnfolder]: For 112/121 co-relation queries the response was YES. [2022-07-12 10:19:21,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 601 events. 104/601 cut-off events. For 112/121 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2854 event pairs, 32 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 943. Up to 87 conditions per place. [2022-07-12 10:19:21,755 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 49 selfloop transitions, 9 changer transitions 7/176 dead transitions. [2022-07-12 10:19:21,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 176 transitions, 579 flow [2022-07-12 10:19:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:19:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:19:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1056 transitions. [2022-07-12 10:19:21,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7586206896551724 [2022-07-12 10:19:21,758 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1056 transitions. [2022-07-12 10:19:21,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1056 transitions. [2022-07-12 10:19:21,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:21,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1056 transitions. [2022-07-12 10:19:21,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,762 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,763 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 398 flow. Second operand 8 states and 1056 transitions. [2022-07-12 10:19:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 176 transitions, 579 flow [2022-07-12 10:19:21,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 176 transitions, 561 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:19:21,767 INFO L242 Difference]: Finished difference. Result has 168 places, 155 transitions, 394 flow [2022-07-12 10:19:21,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2022-07-12 10:19:21,768 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 13 predicate places. [2022-07-12 10:19:21,768 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 394 flow [2022-07-12 10:19:21,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:21,769 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:21,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:19:21,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1008062393, now seen corresponding path program 1 times [2022-07-12 10:19:21,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:21,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344516125] [2022-07-12 10:19:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:19:21,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344516125] [2022-07-12 10:19:21,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344516125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906788584] [2022-07-12 10:19:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:21,939 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) [2022-07-12 10:19:21,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:19:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:19:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:19:22,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:19:22,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906788584] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:22,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:19:22,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2022-07-12 10:19:22,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747927568] [2022-07-12 10:19:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:22,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:19:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:19:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:19:22,721 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2022-07-12 10:19:22,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:22,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:22,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2022-07-12 10:19:22,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:23,008 INFO L129 PetriNetUnfolder]: 89/571 cut-off events. [2022-07-12 10:19:23,009 INFO L130 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2022-07-12 10:19:23,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 571 events. 89/571 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2674 event pairs, 24 based on Foata normal form. 6/540 useless extension candidates. Maximal degree in co-relation 906. Up to 71 conditions per place. [2022-07-12 10:19:23,012 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 49 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2022-07-12 10:19:23,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 173 transitions, 574 flow [2022-07-12 10:19:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:19:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:19:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1770 transitions. [2022-07-12 10:19:23,015 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7266009852216748 [2022-07-12 10:19:23,016 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1770 transitions. [2022-07-12 10:19:23,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1770 transitions. [2022-07-12 10:19:23,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:23,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1770 transitions. [2022-07-12 10:19:23,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.42857142857143) internal successors, (1770), 14 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,023 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,023 INFO L186 Difference]: Start difference. First operand has 168 places, 155 transitions, 394 flow. Second operand 14 states and 1770 transitions. [2022-07-12 10:19:23,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 173 transitions, 574 flow [2022-07-12 10:19:23,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 544 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-07-12 10:19:23,026 INFO L242 Difference]: Finished difference. Result has 175 places, 158 transitions, 426 flow [2022-07-12 10:19:23,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=158} [2022-07-12 10:19:23,027 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 20 predicate places. [2022-07-12 10:19:23,027 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 158 transitions, 426 flow [2022-07-12 10:19:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:23,028 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:23,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:23,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:23,246 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:23,246 INFO L85 PathProgramCache]: Analyzing trace with hash -209614447, now seen corresponding path program 1 times [2022-07-12 10:19:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285414798] [2022-07-12 10:19:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:23,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:23,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:23,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285414798] [2022-07-12 10:19:23,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285414798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:23,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695968589] [2022-07-12 10:19:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:23,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:23,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:23,424 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) [2022-07-12 10:19:23,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:19:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:19:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:23,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:24,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695968589] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:24,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:19:24,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2022-07-12 10:19:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512990005] [2022-07-12 10:19:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:24,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:19:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:19:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:19:24,271 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2022-07-12 10:19:24,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 158 transitions, 426 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:24,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2022-07-12 10:19:24,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:24,631 INFO L129 PetriNetUnfolder]: 76/555 cut-off events. [2022-07-12 10:19:24,631 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-12 10:19:24,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 555 events. 76/555 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2656 event pairs, 27 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 910. Up to 80 conditions per place. [2022-07-12 10:19:24,641 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 50 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2022-07-12 10:19:24,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 174 transitions, 610 flow [2022-07-12 10:19:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:19:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:19:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1768 transitions. [2022-07-12 10:19:24,645 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7257799671592775 [2022-07-12 10:19:24,645 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1768 transitions. [2022-07-12 10:19:24,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1768 transitions. [2022-07-12 10:19:24,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:24,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1768 transitions. [2022-07-12 10:19:24,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.28571428571429) internal successors, (1768), 14 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,668 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,668 INFO L186 Difference]: Start difference. First operand has 175 places, 158 transitions, 426 flow. Second operand 14 states and 1768 transitions. [2022-07-12 10:19:24,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 174 transitions, 610 flow [2022-07-12 10:19:24,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 174 transitions, 591 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-07-12 10:19:24,671 INFO L242 Difference]: Finished difference. Result has 182 places, 159 transitions, 451 flow [2022-07-12 10:19:24,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=451, PETRI_PLACES=182, PETRI_TRANSITIONS=159} [2022-07-12 10:19:24,674 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 27 predicate places. [2022-07-12 10:19:24,674 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 159 transitions, 451 flow [2022-07-12 10:19:24,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:24,675 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:24,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:24,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-12 10:19:24,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1035696176, now seen corresponding path program 1 times [2022-07-12 10:19:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905353790] [2022-07-12 10:19:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:24,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:25,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905353790] [2022-07-12 10:19:25,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905353790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:25,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:25,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 10:19:25,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133031672] [2022-07-12 10:19:25,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:25,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:19:25,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:19:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:19:25,250 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:25,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 159 transitions, 451 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:25,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:25,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:25,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:26,149 INFO L129 PetriNetUnfolder]: 2027/4160 cut-off events. [2022-07-12 10:19:26,149 INFO L130 PetriNetUnfolder]: For 1852/1852 co-relation queries the response was YES. [2022-07-12 10:19:26,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8787 conditions, 4160 events. 2027/4160 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 29629 event pairs, 539 based on Foata normal form. 0/3892 useless extension candidates. Maximal degree in co-relation 8774. Up to 1677 conditions per place. [2022-07-12 10:19:26,170 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 139 selfloop transitions, 44 changer transitions 44/320 dead transitions. [2022-07-12 10:19:26,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 1313 flow [2022-07-12 10:19:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 10:19:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-12 10:19:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3451 transitions. [2022-07-12 10:19:26,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6397849462365591 [2022-07-12 10:19:26,176 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3451 transitions. [2022-07-12 10:19:26,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3451 transitions. [2022-07-12 10:19:26,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:26,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3451 transitions. [2022-07-12 10:19:26,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 111.3225806451613) internal successors, (3451), 31 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,244 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,244 INFO L186 Difference]: Start difference. First operand has 182 places, 159 transitions, 451 flow. Second operand 31 states and 3451 transitions. [2022-07-12 10:19:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 1313 flow [2022-07-12 10:19:26,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 320 transitions, 1278 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-07-12 10:19:26,250 INFO L242 Difference]: Finished difference. Result has 214 places, 185 transitions, 693 flow [2022-07-12 10:19:26,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=693, PETRI_PLACES=214, PETRI_TRANSITIONS=185} [2022-07-12 10:19:26,251 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 59 predicate places. [2022-07-12 10:19:26,251 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 185 transitions, 693 flow [2022-07-12 10:19:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:26,252 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:26,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:19:26,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158248, now seen corresponding path program 2 times [2022-07-12 10:19:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538510659] [2022-07-12 10:19:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:26,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:26,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538510659] [2022-07-12 10:19:26,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538510659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:26,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:26,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:19:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142992722] [2022-07-12 10:19:26,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:26,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:19:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:19:26,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:19:26,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:26,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 185 transitions, 693 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:26,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:26,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:27,736 INFO L129 PetriNetUnfolder]: 2117/4258 cut-off events. [2022-07-12 10:19:27,736 INFO L130 PetriNetUnfolder]: For 4741/4759 co-relation queries the response was YES. [2022-07-12 10:19:27,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11657 conditions, 4258 events. 2117/4258 cut-off events. For 4741/4759 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 30063 event pairs, 624 based on Foata normal form. 35/4268 useless extension candidates. Maximal degree in co-relation 11631. Up to 1677 conditions per place. [2022-07-12 10:19:27,762 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 214 selfloop transitions, 76 changer transitions 1/384 dead transitions. [2022-07-12 10:19:27,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 384 transitions, 2155 flow [2022-07-12 10:19:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 10:19:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-12 10:19:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3893 transitions. [2022-07-12 10:19:27,766 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6392446633825944 [2022-07-12 10:19:27,767 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3893 transitions. [2022-07-12 10:19:27,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3893 transitions. [2022-07-12 10:19:27,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:27,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3893 transitions. [2022-07-12 10:19:27,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 111.22857142857143) internal successors, (3893), 35 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,778 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,778 INFO L186 Difference]: Start difference. First operand has 214 places, 185 transitions, 693 flow. Second operand 35 states and 3893 transitions. [2022-07-12 10:19:27,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 384 transitions, 2155 flow [2022-07-12 10:19:27,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 384 transitions, 2053 flow, removed 21 selfloop flow, removed 19 redundant places. [2022-07-12 10:19:27,797 INFO L242 Difference]: Finished difference. Result has 239 places, 233 transitions, 1207 flow [2022-07-12 10:19:27,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1207, PETRI_PLACES=239, PETRI_TRANSITIONS=233} [2022-07-12 10:19:27,798 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 84 predicate places. [2022-07-12 10:19:27,798 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 233 transitions, 1207 flow [2022-07-12 10:19:27,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:27,799 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:27,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:19:27,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:27,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1430989882, now seen corresponding path program 3 times [2022-07-12 10:19:27,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297717153] [2022-07-12 10:19:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:27,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:28,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:28,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297717153] [2022-07-12 10:19:28,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297717153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:28,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:28,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:19:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907704552] [2022-07-12 10:19:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:19:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:19:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:19:28,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-12 10:19:28,445 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 233 transitions, 1207 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:28,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:28,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-12 10:19:28,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:29,653 INFO L129 PetriNetUnfolder]: 2144/4352 cut-off events. [2022-07-12 10:19:29,653 INFO L130 PetriNetUnfolder]: For 8280/8298 co-relation queries the response was YES. [2022-07-12 10:19:29,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13844 conditions, 4352 events. 2144/4352 cut-off events. For 8280/8298 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 31322 event pairs, 669 based on Foata normal form. 20/4348 useless extension candidates. Maximal degree in co-relation 13804. Up to 1678 conditions per place. [2022-07-12 10:19:29,688 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 147 selfloop transitions, 79 changer transitions 40/356 dead transitions. [2022-07-12 10:19:29,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 356 transitions, 2361 flow [2022-07-12 10:19:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 10:19:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-12 10:19:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3381 transitions. [2022-07-12 10:19:29,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6072198275862069 [2022-07-12 10:19:29,691 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3381 transitions. [2022-07-12 10:19:29,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3381 transitions. [2022-07-12 10:19:29,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:29,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3381 transitions. [2022-07-12 10:19:29,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 105.65625) internal successors, (3381), 32 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,780 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,781 INFO L186 Difference]: Start difference. First operand has 239 places, 233 transitions, 1207 flow. Second operand 32 states and 3381 transitions. [2022-07-12 10:19:29,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 356 transitions, 2361 flow [2022-07-12 10:19:29,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 356 transitions, 2277 flow, removed 16 selfloop flow, removed 17 redundant places. [2022-07-12 10:19:29,816 INFO L242 Difference]: Finished difference. Result has 264 places, 244 transitions, 1501 flow [2022-07-12 10:19:29,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1501, PETRI_PLACES=264, PETRI_TRANSITIONS=244} [2022-07-12 10:19:29,817 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 109 predicate places. [2022-07-12 10:19:29,817 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 244 transitions, 1501 flow [2022-07-12 10:19:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,818 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:29,818 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:19:29,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2113386508, now seen corresponding path program 1 times [2022-07-12 10:19:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:29,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631438332] [2022-07-12 10:19:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:30,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631438332] [2022-07-12 10:19:30,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631438332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:30,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:30,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:19:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363059616] [2022-07-12 10:19:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:30,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:19:30,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:19:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:19:30,149 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:30,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 244 transitions, 1501 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:30,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:30,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:30,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:31,716 INFO L129 PetriNetUnfolder]: 2837/5702 cut-off events. [2022-07-12 10:19:31,717 INFO L130 PetriNetUnfolder]: For 16087/16100 co-relation queries the response was YES. [2022-07-12 10:19:31,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19734 conditions, 5702 events. 2837/5702 cut-off events. For 16087/16100 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 43469 event pairs, 337 based on Foata normal form. 44/5715 useless extension candidates. Maximal degree in co-relation 19682. Up to 1718 conditions per place. [2022-07-12 10:19:31,760 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 266 selfloop transitions, 111 changer transitions 1/471 dead transitions. [2022-07-12 10:19:31,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 471 transitions, 3612 flow [2022-07-12 10:19:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:19:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:19:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4064 transitions. [2022-07-12 10:19:31,764 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.648786717752235 [2022-07-12 10:19:31,764 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4064 transitions. [2022-07-12 10:19:31,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4064 transitions. [2022-07-12 10:19:31,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:31,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4064 transitions. [2022-07-12 10:19:31,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 112.88888888888889) internal successors, (4064), 36 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,774 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,774 INFO L186 Difference]: Start difference. First operand has 264 places, 244 transitions, 1501 flow. Second operand 36 states and 4064 transitions. [2022-07-12 10:19:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 471 transitions, 3612 flow [2022-07-12 10:19:31,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 471 transitions, 3437 flow, removed 53 selfloop flow, removed 22 redundant places. [2022-07-12 10:19:31,845 INFO L242 Difference]: Finished difference. Result has 282 places, 292 transitions, 2217 flow [2022-07-12 10:19:31,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2217, PETRI_PLACES=282, PETRI_TRANSITIONS=292} [2022-07-12 10:19:31,846 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 127 predicate places. [2022-07-12 10:19:31,846 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 292 transitions, 2217 flow [2022-07-12 10:19:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:31,847 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:19:31,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1472592122, now seen corresponding path program 2 times [2022-07-12 10:19:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837409824] [2022-07-12 10:19:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:32,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:32,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837409824] [2022-07-12 10:19:32,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837409824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:32,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:32,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 10:19:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811368809] [2022-07-12 10:19:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:19:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:19:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:19:32,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:32,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 292 transitions, 2217 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:32,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:32,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:33,514 INFO L129 PetriNetUnfolder]: 2853/5760 cut-off events. [2022-07-12 10:19:33,515 INFO L130 PetriNetUnfolder]: For 18750/18769 co-relation queries the response was YES. [2022-07-12 10:19:33,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20795 conditions, 5760 events. 2853/5760 cut-off events. For 18750/18769 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 44206 event pairs, 720 based on Foata normal form. 10/5735 useless extension candidates. Maximal degree in co-relation 20737. Up to 2754 conditions per place. [2022-07-12 10:19:33,556 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 186 selfloop transitions, 98 changer transitions 28/405 dead transitions. [2022-07-12 10:19:33,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 405 transitions, 3568 flow [2022-07-12 10:19:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:19:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:19:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3314 transitions. [2022-07-12 10:19:33,560 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6348659003831417 [2022-07-12 10:19:33,561 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3314 transitions. [2022-07-12 10:19:33,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3314 transitions. [2022-07-12 10:19:33,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:33,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3314 transitions. [2022-07-12 10:19:33,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 110.46666666666667) internal successors, (3314), 30 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:33,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:33,569 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:33,569 INFO L186 Difference]: Start difference. First operand has 282 places, 292 transitions, 2217 flow. Second operand 30 states and 3314 transitions. [2022-07-12 10:19:33,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 405 transitions, 3568 flow [2022-07-12 10:19:33,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 405 transitions, 3423 flow, removed 51 selfloop flow, removed 15 redundant places. [2022-07-12 10:19:33,659 INFO L242 Difference]: Finished difference. Result has 301 places, 304 transitions, 2450 flow [2022-07-12 10:19:33,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2450, PETRI_PLACES=301, PETRI_TRANSITIONS=304} [2022-07-12 10:19:33,660 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 146 predicate places. [2022-07-12 10:19:33,660 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 304 transitions, 2450 flow [2022-07-12 10:19:33,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:33,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:33,661 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:19:33,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456434, now seen corresponding path program 3 times [2022-07-12 10:19:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:33,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420515419] [2022-07-12 10:19:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:33,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:34,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420515419] [2022-07-12 10:19:34,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420515419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:34,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-12 10:19:34,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125497244] [2022-07-12 10:19:34,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:34,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:19:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:19:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:19:34,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-12 10:19:34,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 304 transitions, 2450 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:34,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-12 10:19:34,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:36,345 INFO L129 PetriNetUnfolder]: 3451/6773 cut-off events. [2022-07-12 10:19:36,345 INFO L130 PetriNetUnfolder]: For 18981/19000 co-relation queries the response was YES. [2022-07-12 10:19:36,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23681 conditions, 6773 events. 3451/6773 cut-off events. For 18981/19000 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 53322 event pairs, 543 based on Foata normal form. 48/6787 useless extension candidates. Maximal degree in co-relation 23618. Up to 1701 conditions per place. [2022-07-12 10:19:36,402 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 243 selfloop transitions, 157 changer transitions 3/490 dead transitions. [2022-07-12 10:19:36,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 490 transitions, 4315 flow [2022-07-12 10:19:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:19:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:19:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3713 transitions. [2022-07-12 10:19:36,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5927522349936143 [2022-07-12 10:19:36,414 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3713 transitions. [2022-07-12 10:19:36,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3713 transitions. [2022-07-12 10:19:36,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:36,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3713 transitions. [2022-07-12 10:19:36,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 103.13888888888889) internal successors, (3713), 36 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,431 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,431 INFO L186 Difference]: Start difference. First operand has 301 places, 304 transitions, 2450 flow. Second operand 36 states and 3713 transitions. [2022-07-12 10:19:36,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 490 transitions, 4315 flow [2022-07-12 10:19:36,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 490 transitions, 4108 flow, removed 33 selfloop flow, removed 23 redundant places. [2022-07-12 10:19:36,532 INFO L242 Difference]: Finished difference. Result has 317 places, 333 transitions, 3063 flow [2022-07-12 10:19:36,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3063, PETRI_PLACES=317, PETRI_TRANSITIONS=333} [2022-07-12 10:19:36,533 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 162 predicate places. [2022-07-12 10:19:36,533 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 333 transitions, 3063 flow [2022-07-12 10:19:36,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,534 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:36,534 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:19:36,535 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1562019108, now seen corresponding path program 4 times [2022-07-12 10:19:36,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:36,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623670888] [2022-07-12 10:19:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:36,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623670888] [2022-07-12 10:19:36,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623670888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:36,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:36,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 10:19:36,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277945956] [2022-07-12 10:19:36,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:36,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:19:36,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:19:36,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:19:36,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:36,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 333 transitions, 3063 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:36,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:36,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:38,413 INFO L129 PetriNetUnfolder]: 3548/7008 cut-off events. [2022-07-12 10:19:38,413 INFO L130 PetriNetUnfolder]: For 27000/27019 co-relation queries the response was YES. [2022-07-12 10:19:38,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26374 conditions, 7008 events. 3548/7008 cut-off events. For 27000/27019 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 55486 event pairs, 1163 based on Foata normal form. 12/6971 useless extension candidates. Maximal degree in co-relation 26307. Up to 3808 conditions per place. [2022-07-12 10:19:38,614 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 196 selfloop transitions, 154 changer transitions 0/443 dead transitions. [2022-07-12 10:19:38,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 443 transitions, 4663 flow [2022-07-12 10:19:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:19:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:19:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3216 transitions. [2022-07-12 10:19:38,618 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373365041617123 [2022-07-12 10:19:38,618 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3216 transitions. [2022-07-12 10:19:38,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3216 transitions. [2022-07-12 10:19:38,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:38,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3216 transitions. [2022-07-12 10:19:38,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,625 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,625 INFO L186 Difference]: Start difference. First operand has 317 places, 333 transitions, 3063 flow. Second operand 29 states and 3216 transitions. [2022-07-12 10:19:38,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 443 transitions, 4663 flow [2022-07-12 10:19:38,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 443 transitions, 4531 flow, removed 32 selfloop flow, removed 18 redundant places. [2022-07-12 10:19:38,750 INFO L242 Difference]: Finished difference. Result has 334 places, 364 transitions, 3858 flow [2022-07-12 10:19:38,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3858, PETRI_PLACES=334, PETRI_TRANSITIONS=364} [2022-07-12 10:19:38,751 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 179 predicate places. [2022-07-12 10:19:38,752 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 364 transitions, 3858 flow [2022-07-12 10:19:38,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,752 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:38,752 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:19:38,753 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1785868166, now seen corresponding path program 5 times [2022-07-12 10:19:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:38,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872342714] [2022-07-12 10:19:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:39,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872342714] [2022-07-12 10:19:39,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872342714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:39,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:39,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 10:19:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431113036] [2022-07-12 10:19:39,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:39,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:19:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:19:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:19:39,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:39,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 364 transitions, 3858 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:39,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:39,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:39,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:40,969 INFO L129 PetriNetUnfolder]: 3659/7154 cut-off events. [2022-07-12 10:19:40,970 INFO L130 PetriNetUnfolder]: For 27042/27061 co-relation queries the response was YES. [2022-07-12 10:19:41,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27322 conditions, 7154 events. 3659/7154 cut-off events. For 27042/27061 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 56519 event pairs, 1384 based on Foata normal form. 16/7120 useless extension candidates. Maximal degree in co-relation 27249. Up to 3808 conditions per place. [2022-07-12 10:19:41,026 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 231 selfloop transitions, 154 changer transitions 0/478 dead transitions. [2022-07-12 10:19:41,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 478 transitions, 5677 flow [2022-07-12 10:19:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:19:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:19:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3225 transitions. [2022-07-12 10:19:41,029 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6391200951248514 [2022-07-12 10:19:41,029 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3225 transitions. [2022-07-12 10:19:41,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3225 transitions. [2022-07-12 10:19:41,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:41,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3225 transitions. [2022-07-12 10:19:41,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.20689655172414) internal successors, (3225), 29 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,036 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,037 INFO L186 Difference]: Start difference. First operand has 334 places, 364 transitions, 3858 flow. Second operand 29 states and 3225 transitions. [2022-07-12 10:19:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 478 transitions, 5677 flow [2022-07-12 10:19:41,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 478 transitions, 5547 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-07-12 10:19:41,173 INFO L242 Difference]: Finished difference. Result has 353 places, 401 transitions, 4820 flow [2022-07-12 10:19:41,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4820, PETRI_PLACES=353, PETRI_TRANSITIONS=401} [2022-07-12 10:19:41,174 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 198 predicate places. [2022-07-12 10:19:41,174 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 401 transitions, 4820 flow [2022-07-12 10:19:41,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:41,175 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:41,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:19:41,175 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1680799936, now seen corresponding path program 6 times [2022-07-12 10:19:41,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:41,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995107109] [2022-07-12 10:19:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:41,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995107109] [2022-07-12 10:19:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995107109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 10:19:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3173780] [2022-07-12 10:19:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:19:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:19:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:19:41,557 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:41,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 401 transitions, 4820 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:41,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:41,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:43,452 INFO L129 PetriNetUnfolder]: 3671/7210 cut-off events. [2022-07-12 10:19:43,453 INFO L130 PetriNetUnfolder]: For 32094/32113 co-relation queries the response was YES. [2022-07-12 10:19:43,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28103 conditions, 7210 events. 3671/7210 cut-off events. For 32094/32113 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 57034 event pairs, 1341 based on Foata normal form. 12/7176 useless extension candidates. Maximal degree in co-relation 28021. Up to 3808 conditions per place. [2022-07-12 10:19:43,525 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 211 selfloop transitions, 183 changer transitions 1/488 dead transitions. [2022-07-12 10:19:43,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 488 transitions, 6259 flow [2022-07-12 10:19:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:19:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:19:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3216 transitions. [2022-07-12 10:19:43,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373365041617123 [2022-07-12 10:19:43,529 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3216 transitions. [2022-07-12 10:19:43,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3216 transitions. [2022-07-12 10:19:43,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:43,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3216 transitions. [2022-07-12 10:19:43,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,536 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,536 INFO L186 Difference]: Start difference. First operand has 353 places, 401 transitions, 4820 flow. Second operand 29 states and 3216 transitions. [2022-07-12 10:19:43,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 488 transitions, 6259 flow [2022-07-12 10:19:43,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 488 transitions, 6033 flow, removed 29 selfloop flow, removed 18 redundant places. [2022-07-12 10:19:43,700 INFO L242 Difference]: Finished difference. Result has 370 places, 410 transitions, 5279 flow [2022-07-12 10:19:43,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5279, PETRI_PLACES=370, PETRI_TRANSITIONS=410} [2022-07-12 10:19:43,701 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 215 predicate places. [2022-07-12 10:19:43,701 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 410 transitions, 5279 flow [2022-07-12 10:19:43,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:43,702 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:43,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:19:43,702 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:43,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash -403227108, now seen corresponding path program 4 times [2022-07-12 10:19:43,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:43,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021797863] [2022-07-12 10:19:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:43,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:44,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:44,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021797863] [2022-07-12 10:19:44,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021797863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:44,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:44,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 10:19:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937209624] [2022-07-12 10:19:44,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:44,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:19:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:19:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:19:44,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-12 10:19:44,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 410 transitions, 5279 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:44,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:44,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-12 10:19:44,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:45,833 INFO L129 PetriNetUnfolder]: 3672/7214 cut-off events. [2022-07-12 10:19:45,834 INFO L130 PetriNetUnfolder]: For 35564/35583 co-relation queries the response was YES. [2022-07-12 10:19:45,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28655 conditions, 7214 events. 3672/7214 cut-off events. For 35564/35583 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 57214 event pairs, 1367 based on Foata normal form. 14/7185 useless extension candidates. Maximal degree in co-relation 28568. Up to 3808 conditions per place. [2022-07-12 10:19:45,893 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 246 selfloop transitions, 133 changer transitions 12/484 dead transitions. [2022-07-12 10:19:45,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 484 transitions, 6531 flow [2022-07-12 10:19:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:19:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:19:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3205 transitions. [2022-07-12 10:19:45,896 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6351565596512089 [2022-07-12 10:19:45,896 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3205 transitions. [2022-07-12 10:19:45,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3205 transitions. [2022-07-12 10:19:45,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:45,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3205 transitions. [2022-07-12 10:19:45,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.51724137931035) internal successors, (3205), 29 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:45,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:45,903 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:45,903 INFO L186 Difference]: Start difference. First operand has 370 places, 410 transitions, 5279 flow. Second operand 29 states and 3205 transitions. [2022-07-12 10:19:45,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 484 transitions, 6531 flow [2022-07-12 10:19:46,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 484 transitions, 6305 flow, removed 34 selfloop flow, removed 24 redundant places. [2022-07-12 10:19:46,066 INFO L242 Difference]: Finished difference. Result has 379 places, 413 transitions, 5410 flow [2022-07-12 10:19:46,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5410, PETRI_PLACES=379, PETRI_TRANSITIONS=413} [2022-07-12 10:19:46,067 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 224 predicate places. [2022-07-12 10:19:46,067 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 413 transitions, 5410 flow [2022-07-12 10:19:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:46,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:46,067 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:19:46,068 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1821375558, now seen corresponding path program 5 times [2022-07-12 10:19:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:46,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668641006] [2022-07-12 10:19:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:19:46,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668641006] [2022-07-12 10:19:46,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668641006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972437621] [2022-07-12 10:19:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:19:46,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:46,621 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) [2022-07-12 10:19:46,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:19:46,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:19:46,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:19:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-12 10:19:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:46,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-12 10:19:46,857 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 10:19:46,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2022-07-12 10:19:47,036 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-12 10:19:47,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 10:19:47,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:19:47,646 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-12 10:19:47,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 10:19:47,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-07-12 10:19:48,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:19:48,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 23 [2022-07-12 10:19:48,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-07-12 10:19:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:48,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:49,743 INFO L356 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2022-07-12 10:19:49,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 182 treesize of output 88 [2022-07-12 10:19:49,831 INFO L356 Elim1Store]: treesize reduction 39, result has 76.1 percent of original size [2022-07-12 10:19:49,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 878 treesize of output 853 [2022-07-12 10:19:49,874 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:19:49,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 712 treesize of output 696 [2022-07-12 10:19:49,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:19:49,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 566 treesize of output 420 [2022-07-12 10:19:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972437621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:54,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:54,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 26] total 65 [2022-07-12 10:19:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865511073] [2022-07-12 10:19:54,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 10:19:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 10:19:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3705, Unknown=86, NotChecked=0, Total=4160 [2022-07-12 10:19:54,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-07-12 10:19:54,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 413 transitions, 5410 flow. Second operand has 65 states, 65 states have (on average 86.58461538461539) internal successors, (5628), 65 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:54,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-07-12 10:19:54,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:59,240 INFO L129 PetriNetUnfolder]: 3542/6859 cut-off events. [2022-07-12 10:19:59,240 INFO L130 PetriNetUnfolder]: For 35721/35740 co-relation queries the response was YES. [2022-07-12 10:19:59,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27809 conditions, 6859 events. 3542/6859 cut-off events. For 35721/35740 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 53037 event pairs, 407 based on Foata normal form. 40/6873 useless extension candidates. Maximal degree in co-relation 27725. Up to 1819 conditions per place. [2022-07-12 10:19:59,312 INFO L132 encePairwiseOnDemand]: 137/174 looper letters, 299 selfloop transitions, 245 changer transitions 4/621 dead transitions. [2022-07-12 10:19:59,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 621 transitions, 7708 flow [2022-07-12 10:19:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 10:19:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-12 10:19:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4378 transitions. [2022-07-12 10:19:59,316 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5241858237547893 [2022-07-12 10:19:59,316 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4378 transitions. [2022-07-12 10:19:59,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4378 transitions. [2022-07-12 10:19:59,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:59,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4378 transitions. [2022-07-12 10:19:59,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 91.20833333333333) internal successors, (4378), 48 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:59,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 174.0) internal successors, (8526), 49 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:59,325 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 174.0) internal successors, (8526), 49 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:59,325 INFO L186 Difference]: Start difference. First operand has 379 places, 413 transitions, 5410 flow. Second operand 48 states and 4378 transitions. [2022-07-12 10:19:59,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 621 transitions, 7708 flow [2022-07-12 10:19:59,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 621 transitions, 7543 flow, removed 24 selfloop flow, removed 21 redundant places. [2022-07-12 10:19:59,487 INFO L242 Difference]: Finished difference. Result has 406 places, 424 transitions, 5992 flow [2022-07-12 10:19:59,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5992, PETRI_PLACES=406, PETRI_TRANSITIONS=424} [2022-07-12 10:19:59,488 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 251 predicate places. [2022-07-12 10:19:59,488 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 424 transitions, 5992 flow [2022-07-12 10:19:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 86.58461538461539) internal successors, (5628), 65 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:59,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:59,489 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:59,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:59,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:59,706 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1841134454, now seen corresponding path program 7 times [2022-07-12 10:19:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:59,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249575216] [2022-07-12 10:19:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:59,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:00,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249575216] [2022-07-12 10:20:00,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249575216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:00,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:00,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:00,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282781649] [2022-07-12 10:20:00,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:00,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-12 10:20:00,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 424 transitions, 5992 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:00,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:00,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-12 10:20:00,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:02,180 INFO L129 PetriNetUnfolder]: 3656/7069 cut-off events. [2022-07-12 10:20:02,181 INFO L130 PetriNetUnfolder]: For 46552/46571 co-relation queries the response was YES. [2022-07-12 10:20:02,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31093 conditions, 7069 events. 3656/7069 cut-off events. For 46552/46571 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 54851 event pairs, 1105 based on Foata normal form. 32/7054 useless extension candidates. Maximal degree in co-relation 31010. Up to 3604 conditions per place. [2022-07-12 10:20:02,273 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 243 selfloop transitions, 211 changer transitions 0/541 dead transitions. [2022-07-12 10:20:02,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 541 transitions, 8276 flow [2022-07-12 10:20:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:20:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:20:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2660 transitions. [2022-07-12 10:20:02,276 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5879752431476569 [2022-07-12 10:20:02,276 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2660 transitions. [2022-07-12 10:20:02,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2660 transitions. [2022-07-12 10:20:02,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:02,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2660 transitions. [2022-07-12 10:20:02,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.3076923076923) internal successors, (2660), 26 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,281 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,281 INFO L186 Difference]: Start difference. First operand has 406 places, 424 transitions, 5992 flow. Second operand 26 states and 2660 transitions. [2022-07-12 10:20:02,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 541 transitions, 8276 flow [2022-07-12 10:20:02,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 541 transitions, 7491 flow, removed 28 selfloop flow, removed 41 redundant places. [2022-07-12 10:20:02,539 INFO L242 Difference]: Finished difference. Result has 396 places, 472 transitions, 6886 flow [2022-07-12 10:20:02,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5327, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6886, PETRI_PLACES=396, PETRI_TRANSITIONS=472} [2022-07-12 10:20:02,540 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 241 predicate places. [2022-07-12 10:20:02,540 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 472 transitions, 6886 flow [2022-07-12 10:20:02,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:02,541 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:02,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:20:02,541 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:02,541 INFO L85 PathProgramCache]: Analyzing trace with hash 773073508, now seen corresponding path program 6 times [2022-07-12 10:20:02,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:02,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189606086] [2022-07-12 10:20:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:02,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:03,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189606086] [2022-07-12 10:20:03,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189606086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:03,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:03,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:03,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020865940] [2022-07-12 10:20:03,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:03,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:03,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:03,065 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-12 10:20:03,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 472 transitions, 6886 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:03,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:03,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-12 10:20:03,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:05,009 INFO L129 PetriNetUnfolder]: 3618/7019 cut-off events. [2022-07-12 10:20:05,010 INFO L130 PetriNetUnfolder]: For 41717/41736 co-relation queries the response was YES. [2022-07-12 10:20:05,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29835 conditions, 7019 events. 3618/7019 cut-off events. For 41717/41736 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 54791 event pairs, 1110 based on Foata normal form. 28/7001 useless extension candidates. Maximal degree in co-relation 29749. Up to 3604 conditions per place. [2022-07-12 10:20:05,100 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 259 selfloop transitions, 177 changer transitions 7/530 dead transitions. [2022-07-12 10:20:05,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 530 transitions, 7909 flow [2022-07-12 10:20:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:20:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:20:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2650 transitions. [2022-07-12 10:20:05,103 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5857648099027409 [2022-07-12 10:20:05,103 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2650 transitions. [2022-07-12 10:20:05,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2650 transitions. [2022-07-12 10:20:05,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:05,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2650 transitions. [2022-07-12 10:20:05,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 101.92307692307692) internal successors, (2650), 26 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:05,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:05,128 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:05,128 INFO L186 Difference]: Start difference. First operand has 396 places, 472 transitions, 6886 flow. Second operand 26 states and 2650 transitions. [2022-07-12 10:20:05,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 530 transitions, 7909 flow [2022-07-12 10:20:05,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 530 transitions, 7654 flow, removed 19 selfloop flow, removed 21 redundant places. [2022-07-12 10:20:05,387 INFO L242 Difference]: Finished difference. Result has 403 places, 462 transitions, 6788 flow [2022-07-12 10:20:05,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6788, PETRI_PLACES=403, PETRI_TRANSITIONS=462} [2022-07-12 10:20:05,389 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 248 predicate places. [2022-07-12 10:20:05,389 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 462 transitions, 6788 flow [2022-07-12 10:20:05,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:05,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:05,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:05,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:20:05,390 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1869552764, now seen corresponding path program 7 times [2022-07-12 10:20:05,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:05,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925306027] [2022-07-12 10:20:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:05,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:05,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925306027] [2022-07-12 10:20:05,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925306027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:05,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:05,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-12 10:20:05,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746895922] [2022-07-12 10:20:05,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:05,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:20:05,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:05,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:20:05,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:20:05,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-12 10:20:05,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 462 transitions, 6788 flow. Second operand has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:05,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:05,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-12 10:20:05,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:08,087 INFO L129 PetriNetUnfolder]: 4296/8239 cut-off events. [2022-07-12 10:20:08,087 INFO L130 PetriNetUnfolder]: For 50387/50406 co-relation queries the response was YES. [2022-07-12 10:20:08,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35148 conditions, 8239 events. 4296/8239 cut-off events. For 50387/50406 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 66052 event pairs, 1137 based on Foata normal form. 76/8262 useless extension candidates. Maximal degree in co-relation 35061. Up to 3709 conditions per place. [2022-07-12 10:20:08,201 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 280 selfloop transitions, 244 changer transitions 0/614 dead transitions. [2022-07-12 10:20:08,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 614 transitions, 9013 flow [2022-07-12 10:20:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:20:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:20:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3516 transitions. [2022-07-12 10:20:08,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6123301985370951 [2022-07-12 10:20:08,209 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3516 transitions. [2022-07-12 10:20:08,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3516 transitions. [2022-07-12 10:20:08,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:08,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3516 transitions. [2022-07-12 10:20:08,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.54545454545455) internal successors, (3516), 33 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,238 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,238 INFO L186 Difference]: Start difference. First operand has 403 places, 462 transitions, 6788 flow. Second operand 33 states and 3516 transitions. [2022-07-12 10:20:08,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 614 transitions, 9013 flow [2022-07-12 10:20:08,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 614 transitions, 8748 flow, removed 4 selfloop flow, removed 20 redundant places. [2022-07-12 10:20:08,528 INFO L242 Difference]: Finished difference. Result has 420 places, 495 transitions, 7676 flow [2022-07-12 10:20:08,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7676, PETRI_PLACES=420, PETRI_TRANSITIONS=495} [2022-07-12 10:20:08,529 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 265 predicate places. [2022-07-12 10:20:08,529 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 495 transitions, 7676 flow [2022-07-12 10:20:08,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:08,530 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:08,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 10:20:08,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:08,531 INFO L85 PathProgramCache]: Analyzing trace with hash 397189860, now seen corresponding path program 8 times [2022-07-12 10:20:08,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218195286] [2022-07-12 10:20:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:09,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:09,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218195286] [2022-07-12 10:20:09,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218195286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:09,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:09,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882971757] [2022-07-12 10:20:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:09,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:09,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:09,105 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-12 10:20:09,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 495 transitions, 7676 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:09,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-12 10:20:09,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:11,551 INFO L129 PetriNetUnfolder]: 4266/8200 cut-off events. [2022-07-12 10:20:11,552 INFO L130 PetriNetUnfolder]: For 55803/55822 co-relation queries the response was YES. [2022-07-12 10:20:11,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36496 conditions, 8200 events. 4266/8200 cut-off events. For 55803/55822 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 66059 event pairs, 1248 based on Foata normal form. 20/8157 useless extension candidates. Maximal degree in co-relation 36405. Up to 4560 conditions per place. [2022-07-12 10:20:11,681 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 237 selfloop transitions, 231 changer transitions 0/555 dead transitions. [2022-07-12 10:20:11,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 555 transitions, 8848 flow [2022-07-12 10:20:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:20:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:20:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2749 transitions. [2022-07-12 10:20:11,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5851426138782461 [2022-07-12 10:20:11,684 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2749 transitions. [2022-07-12 10:20:11,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2749 transitions. [2022-07-12 10:20:11,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:11,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2749 transitions. [2022-07-12 10:20:11,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.81481481481481) internal successors, (2749), 27 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,689 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,689 INFO L186 Difference]: Start difference. First operand has 420 places, 495 transitions, 7676 flow. Second operand 27 states and 2749 transitions. [2022-07-12 10:20:11,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 555 transitions, 8848 flow [2022-07-12 10:20:12,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 555 transitions, 8618 flow, removed 15 selfloop flow, removed 21 redundant places. [2022-07-12 10:20:12,010 INFO L242 Difference]: Finished difference. Result has 426 places, 492 transitions, 7866 flow [2022-07-12 10:20:12,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7866, PETRI_PLACES=426, PETRI_TRANSITIONS=492} [2022-07-12 10:20:12,011 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 271 predicate places. [2022-07-12 10:20:12,011 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 492 transitions, 7866 flow [2022-07-12 10:20:12,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:12,012 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:12,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 10:20:12,012 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash -714716454, now seen corresponding path program 9 times [2022-07-12 10:20:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842162141] [2022-07-12 10:20:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:12,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842162141] [2022-07-12 10:20:12,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842162141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077136683] [2022-07-12 10:20:12,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:20:12,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:12,510 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) [2022-07-12 10:20:12,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:20:12,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:20:12,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:20:12,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 10:20:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:12,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-12 10:20:12,845 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:20:12,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:20:13,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:20:13,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:20:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:13,843 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 10:20:13,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-12 10:20:13,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:20:13,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-07-12 10:20:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:20:14,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:14,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:20:14,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 70 [2022-07-12 10:20:14,522 INFO L356 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2022-07-12 10:20:14,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 924 treesize of output 833 [2022-07-12 10:20:14,539 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:20:14,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 694 treesize of output 518 [2022-07-12 10:20:14,578 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:20:14,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 572 treesize of output 548 [2022-07-12 10:20:16,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 10:20:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:20:16,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077136683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:16,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:16,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 61 [2022-07-12 10:20:16,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368331282] [2022-07-12 10:20:16,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:16,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-12 10:20:16,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-12 10:20:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3318, Unknown=30, NotChecked=0, Total=3660 [2022-07-12 10:20:16,233 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-07-12 10:20:16,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 492 transitions, 7866 flow. Second operand has 61 states, 61 states have (on average 86.70491803278688) internal successors, (5289), 61 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:16,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:16,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-07-12 10:20:16,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:20,714 INFO L129 PetriNetUnfolder]: 4541/8748 cut-off events. [2022-07-12 10:20:20,714 INFO L130 PetriNetUnfolder]: For 61914/61933 co-relation queries the response was YES. [2022-07-12 10:20:20,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39634 conditions, 8748 events. 4541/8748 cut-off events. For 61914/61933 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 71586 event pairs, 901 based on Foata normal form. 68/8766 useless extension candidates. Maximal degree in co-relation 39544. Up to 3466 conditions per place. [2022-07-12 10:20:20,855 INFO L132 encePairwiseOnDemand]: 133/174 looper letters, 315 selfloop transitions, 366 changer transitions 2/756 dead transitions. [2022-07-12 10:20:20,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 756 transitions, 11354 flow [2022-07-12 10:20:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 10:20:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-12 10:20:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4626 transitions. [2022-07-12 10:20:20,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5212981744421906 [2022-07-12 10:20:20,859 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4626 transitions. [2022-07-12 10:20:20,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4626 transitions. [2022-07-12 10:20:20,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:20,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4626 transitions. [2022-07-12 10:20:20,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 90.70588235294117) internal successors, (4626), 51 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:20,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 174.0) internal successors, (9048), 52 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:20,870 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 174.0) internal successors, (9048), 52 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:20,870 INFO L186 Difference]: Start difference. First operand has 426 places, 492 transitions, 7866 flow. Second operand 51 states and 4626 transitions. [2022-07-12 10:20:20,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 756 transitions, 11354 flow [2022-07-12 10:20:21,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 756 transitions, 11042 flow, removed 2 selfloop flow, removed 22 redundant places. [2022-07-12 10:20:21,221 INFO L242 Difference]: Finished difference. Result has 465 places, 597 transitions, 9896 flow [2022-07-12 10:20:21,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7579, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9896, PETRI_PLACES=465, PETRI_TRANSITIONS=597} [2022-07-12 10:20:21,223 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 310 predicate places. [2022-07-12 10:20:21,223 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 597 transitions, 9896 flow [2022-07-12 10:20:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 86.70491803278688) internal successors, (5289), 61 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:21,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:21,224 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:21,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:20:21,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:21,441 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1230885854, now seen corresponding path program 8 times [2022-07-12 10:20:21,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:21,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164406877] [2022-07-12 10:20:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:21,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164406877] [2022-07-12 10:20:21,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164406877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:21,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:21,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039447106] [2022-07-12 10:20:21,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:21,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:21,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:21,979 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-12 10:20:21,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 597 transitions, 9896 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:21,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:21,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-12 10:20:21,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:24,314 INFO L129 PetriNetUnfolder]: 4573/8856 cut-off events. [2022-07-12 10:20:24,314 INFO L130 PetriNetUnfolder]: For 75078/75097 co-relation queries the response was YES. [2022-07-12 10:20:24,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44739 conditions, 8856 events. 4573/8856 cut-off events. For 75078/75097 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 72998 event pairs, 1188 based on Foata normal form. 20/8797 useless extension candidates. Maximal degree in co-relation 44638. Up to 4799 conditions per place. [2022-07-12 10:20:24,429 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 362 selfloop transitions, 204 changer transitions 15/668 dead transitions. [2022-07-12 10:20:24,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 668 transitions, 11568 flow [2022-07-12 10:20:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:20:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:20:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2938 transitions. [2022-07-12 10:20:24,431 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5822433610780816 [2022-07-12 10:20:24,432 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2938 transitions. [2022-07-12 10:20:24,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2938 transitions. [2022-07-12 10:20:24,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:24,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2938 transitions. [2022-07-12 10:20:24,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 101.3103448275862) internal successors, (2938), 29 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:24,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:24,437 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:24,437 INFO L186 Difference]: Start difference. First operand has 465 places, 597 transitions, 9896 flow. Second operand 29 states and 2938 transitions. [2022-07-12 10:20:24,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 668 transitions, 11568 flow [2022-07-12 10:20:24,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 668 transitions, 10490 flow, removed 105 selfloop flow, removed 37 redundant places. [2022-07-12 10:20:24,904 INFO L242 Difference]: Finished difference. Result has 458 places, 592 transitions, 9169 flow [2022-07-12 10:20:24,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9169, PETRI_PLACES=458, PETRI_TRANSITIONS=592} [2022-07-12 10:20:24,905 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 303 predicate places. [2022-07-12 10:20:24,905 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 592 transitions, 9169 flow [2022-07-12 10:20:24,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:24,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:24,906 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 10:20:24,906 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2117038966, now seen corresponding path program 9 times [2022-07-12 10:20:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:24,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118918787] [2022-07-12 10:20:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:24,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118918787] [2022-07-12 10:20:25,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118918787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:25,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:25,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305309836] [2022-07-12 10:20:25,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:25,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:25,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:25,321 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-12 10:20:25,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 592 transitions, 9169 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:25,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:25,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-12 10:20:25,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:27,655 INFO L129 PetriNetUnfolder]: 4525/8766 cut-off events. [2022-07-12 10:20:27,655 INFO L130 PetriNetUnfolder]: For 64568/64587 co-relation queries the response was YES. [2022-07-12 10:20:27,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 8766 events. 4525/8766 cut-off events. For 64568/64587 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 72051 event pairs, 1248 based on Foata normal form. 20/8709 useless extension candidates. Maximal degree in co-relation 41211. Up to 4796 conditions per place. [2022-07-12 10:20:27,793 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 348 selfloop transitions, 205 changer transitions 9/652 dead transitions. [2022-07-12 10:20:27,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 652 transitions, 10668 flow [2022-07-12 10:20:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:20:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:20:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2845 transitions. [2022-07-12 10:20:27,795 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6055768412090251 [2022-07-12 10:20:27,795 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2845 transitions. [2022-07-12 10:20:27,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2845 transitions. [2022-07-12 10:20:27,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:27,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2845 transitions. [2022-07-12 10:20:27,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.37037037037037) internal successors, (2845), 27 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:27,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:27,821 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:27,822 INFO L186 Difference]: Start difference. First operand has 458 places, 592 transitions, 9169 flow. Second operand 27 states and 2845 transitions. [2022-07-12 10:20:27,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 652 transitions, 10668 flow [2022-07-12 10:20:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 652 transitions, 10428 flow, removed 9 selfloop flow, removed 26 redundant places. [2022-07-12 10:20:28,141 INFO L242 Difference]: Finished difference. Result has 456 places, 587 transitions, 9257 flow [2022-07-12 10:20:28,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8909, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9257, PETRI_PLACES=456, PETRI_TRANSITIONS=587} [2022-07-12 10:20:28,142 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 301 predicate places. [2022-07-12 10:20:28,142 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 587 transitions, 9257 flow [2022-07-12 10:20:28,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:28,142 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:28,143 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:28,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 10:20:28,143 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1845315764, now seen corresponding path program 10 times [2022-07-12 10:20:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:28,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488822615] [2022-07-12 10:20:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:28,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:28,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488822615] [2022-07-12 10:20:28,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488822615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253128688] [2022-07-12 10:20:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:20:28,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:28,557 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) [2022-07-12 10:20:28,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:20:28,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:20:28,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:20:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 10:20:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:28,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-12 10:20:28,683 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 10:20:28,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2022-07-12 10:20:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:28,869 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 10:20:28,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-07-12 10:20:29,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:20:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:29,380 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-12 10:20:29,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2022-07-12 10:20:29,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:20:29,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:20:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:20:29,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-12 10:20:29,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-12 10:20:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:30,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:30,502 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_515 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_513 Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_513)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_514))) (or (not (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_515)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (let ((.cse3 (* c_~i_AB~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)) (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3))))))) is different from false [2022-07-12 10:20:30,539 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_515 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_513 Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_513)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_514))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1)))) (not (let ((.cse2 (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_515)) (.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse3 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)))))))) is different from false [2022-07-12 10:20:30,555 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_515 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_513 Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_513)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_514))) (or (not (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_515)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (let ((.cse3 (* c_~i_AB~0 4))) (= (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) (+ |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3))))))) is different from false [2022-07-12 10:20:31,099 INFO L356 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2022-07-12 10:20:31,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 92 [2022-07-12 10:20:31,181 INFO L356 Elim1Store]: treesize reduction 47, result has 73.7 percent of original size [2022-07-12 10:20:31,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1842 treesize of output 1677 [2022-07-12 10:20:31,220 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:20:31,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1528 treesize of output 1408 [2022-07-12 10:20:31,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:20:31,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1270 treesize of output 903 [2022-07-12 10:20:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-12 10:20:32,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253128688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:32,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:32,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 26] total 65 [2022-07-12 10:20:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097391728] [2022-07-12 10:20:32,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 10:20:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 10:20:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3322, Unknown=93, NotChecked=366, Total=4160 [2022-07-12 10:20:32,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-07-12 10:20:32,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 587 transitions, 9257 flow. Second operand has 65 states, 65 states have (on average 86.50769230769231) internal successors, (5623), 65 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:32,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:32,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-07-12 10:20:32,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:37,896 INFO L129 PetriNetUnfolder]: 4722/9081 cut-off events. [2022-07-12 10:20:37,897 INFO L130 PetriNetUnfolder]: For 70039/70058 co-relation queries the response was YES. [2022-07-12 10:20:38,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42970 conditions, 9081 events. 4722/9081 cut-off events. For 70039/70058 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 74673 event pairs, 1098 based on Foata normal form. 36/9042 useless extension candidates. Maximal degree in co-relation 42872. Up to 4503 conditions per place. [2022-07-12 10:20:38,040 INFO L132 encePairwiseOnDemand]: 134/174 looper letters, 411 selfloop transitions, 274 changer transitions 1/759 dead transitions. [2022-07-12 10:20:38,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 759 transitions, 12046 flow [2022-07-12 10:20:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 10:20:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-12 10:20:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3458 transitions. [2022-07-12 10:20:38,043 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2022-07-12 10:20:38,043 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3458 transitions. [2022-07-12 10:20:38,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3458 transitions. [2022-07-12 10:20:38,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:38,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3458 transitions. [2022-07-12 10:20:38,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 91.0) internal successors, (3458), 38 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:38,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:38,049 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:38,049 INFO L186 Difference]: Start difference. First operand has 456 places, 587 transitions, 9257 flow. Second operand 38 states and 3458 transitions. [2022-07-12 10:20:38,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 759 transitions, 12046 flow [2022-07-12 10:20:38,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 759 transitions, 11482 flow, removed 5 selfloop flow, removed 28 redundant places. [2022-07-12 10:20:38,589 INFO L242 Difference]: Finished difference. Result has 470 places, 625 transitions, 9998 flow [2022-07-12 10:20:38,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8714, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9998, PETRI_PLACES=470, PETRI_TRANSITIONS=625} [2022-07-12 10:20:38,591 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 315 predicate places. [2022-07-12 10:20:38,591 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 625 transitions, 9998 flow [2022-07-12 10:20:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 86.50769230769231) internal successors, (5623), 65 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:38,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:38,592 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:38,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:20:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:20:38,803 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1773275984, now seen corresponding path program 10 times [2022-07-12 10:20:38,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:38,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581430583] [2022-07-12 10:20:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:38,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:39,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581430583] [2022-07-12 10:20:39,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581430583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:39,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:39,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:20:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003271884] [2022-07-12 10:20:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:20:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:20:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:20:39,220 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:20:39,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 625 transitions, 9998 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:39,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:39,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:20:39,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:41,514 INFO L129 PetriNetUnfolder]: 4720/9119 cut-off events. [2022-07-12 10:20:41,514 INFO L130 PetriNetUnfolder]: For 78293/78312 co-relation queries the response was YES. [2022-07-12 10:20:41,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46144 conditions, 9119 events. 4720/9119 cut-off events. For 78293/78312 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 75270 event pairs, 1215 based on Foata normal form. 14/9054 useless extension candidates. Maximal degree in co-relation 46041. Up to 4993 conditions per place. [2022-07-12 10:20:41,644 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 373 selfloop transitions, 213 changer transitions 9/683 dead transitions. [2022-07-12 10:20:41,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 683 transitions, 11640 flow [2022-07-12 10:20:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:20:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:20:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2963 transitions. [2022-07-12 10:20:41,649 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5871977804201347 [2022-07-12 10:20:41,649 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2963 transitions. [2022-07-12 10:20:41,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2963 transitions. [2022-07-12 10:20:41,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:41,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2963 transitions. [2022-07-12 10:20:41,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.17241379310344) internal successors, (2963), 29 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:41,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:41,654 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:41,654 INFO L186 Difference]: Start difference. First operand has 470 places, 625 transitions, 9998 flow. Second operand 29 states and 2963 transitions. [2022-07-12 10:20:41,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 683 transitions, 11640 flow [2022-07-12 10:20:42,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 683 transitions, 11240 flow, removed 32 selfloop flow, removed 29 redundant places. [2022-07-12 10:20:42,048 INFO L242 Difference]: Finished difference. Result has 474 places, 624 transitions, 10139 flow [2022-07-12 10:20:42,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10139, PETRI_PLACES=474, PETRI_TRANSITIONS=624} [2022-07-12 10:20:42,052 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 319 predicate places. [2022-07-12 10:20:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 624 transitions, 10139 flow [2022-07-12 10:20:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:42,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:42,053 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:42,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 10:20:42,054 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1442239000, now seen corresponding path program 11 times [2022-07-12 10:20:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:42,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11237298] [2022-07-12 10:20:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11237298] [2022-07-12 10:20:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11237298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:42,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:42,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074165834] [2022-07-12 10:20:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:42,436 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:20:42,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 624 transitions, 10139 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:42,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:42,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:20:42,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:45,039 INFO L129 PetriNetUnfolder]: 5170/9923 cut-off events. [2022-07-12 10:20:45,040 INFO L130 PetriNetUnfolder]: For 90183/90202 co-relation queries the response was YES. [2022-07-12 10:20:45,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50063 conditions, 9923 events. 5170/9923 cut-off events. For 90183/90202 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 83191 event pairs, 1164 based on Foata normal form. 76/9919 useless extension candidates. Maximal degree in co-relation 49955. Up to 4630 conditions per place. [2022-07-12 10:20:45,264 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 392 selfloop transitions, 299 changer transitions 0/779 dead transitions. [2022-07-12 10:20:45,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 779 transitions, 12976 flow [2022-07-12 10:20:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:20:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:20:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3420 transitions. [2022-07-12 10:20:45,267 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5956112852664577 [2022-07-12 10:20:45,267 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3420 transitions. [2022-07-12 10:20:45,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3420 transitions. [2022-07-12 10:20:45,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:45,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3420 transitions. [2022-07-12 10:20:45,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.63636363636364) internal successors, (3420), 33 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:45,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:45,273 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:45,273 INFO L186 Difference]: Start difference. First operand has 474 places, 624 transitions, 10139 flow. Second operand 33 states and 3420 transitions. [2022-07-12 10:20:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 779 transitions, 12976 flow [2022-07-12 10:20:45,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 779 transitions, 12484 flow, removed 32 selfloop flow, removed 29 redundant places. [2022-07-12 10:20:45,753 INFO L242 Difference]: Finished difference. Result has 483 places, 659 transitions, 11159 flow [2022-07-12 10:20:45,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=9695, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11159, PETRI_PLACES=483, PETRI_TRANSITIONS=659} [2022-07-12 10:20:45,754 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 328 predicate places. [2022-07-12 10:20:45,754 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 659 transitions, 11159 flow [2022-07-12 10:20:45,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:45,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:45,755 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:45,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:20:45,755 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -356820308, now seen corresponding path program 12 times [2022-07-12 10:20:45,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930373736] [2022-07-12 10:20:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:45,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:46,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930373736] [2022-07-12 10:20:46,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930373736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:46,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:46,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:20:46,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383397166] [2022-07-12 10:20:46,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:46,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:20:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:20:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:20:46,217 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:20:46,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 659 transitions, 11159 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:46,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:46,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:20:46,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:48,711 INFO L129 PetriNetUnfolder]: 5234/10061 cut-off events. [2022-07-12 10:20:48,711 INFO L130 PetriNetUnfolder]: For 99200/99219 co-relation queries the response was YES. [2022-07-12 10:20:48,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52583 conditions, 10061 events. 5234/10061 cut-off events. For 99200/99219 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 84525 event pairs, 1274 based on Foata normal form. 24/9998 useless extension candidates. Maximal degree in co-relation 52474. Up to 5642 conditions per place. [2022-07-12 10:20:48,870 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 403 selfloop transitions, 248 changer transitions 5/744 dead transitions. [2022-07-12 10:20:48,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 744 transitions, 13645 flow [2022-07-12 10:20:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:20:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:20:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2773 transitions. [2022-07-12 10:20:48,873 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5902511707109408 [2022-07-12 10:20:48,873 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2773 transitions. [2022-07-12 10:20:48,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2773 transitions. [2022-07-12 10:20:48,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:48,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2773 transitions. [2022-07-12 10:20:48,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.70370370370371) internal successors, (2773), 27 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:48,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:48,877 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:48,877 INFO L186 Difference]: Start difference. First operand has 483 places, 659 transitions, 11159 flow. Second operand 27 states and 2773 transitions. [2022-07-12 10:20:48,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 744 transitions, 13645 flow [2022-07-12 10:20:49,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 744 transitions, 13348 flow, removed 25 selfloop flow, removed 21 redundant places. [2022-07-12 10:20:49,377 INFO L242 Difference]: Finished difference. Result has 492 places, 687 transitions, 12225 flow [2022-07-12 10:20:49,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=10884, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12225, PETRI_PLACES=492, PETRI_TRANSITIONS=687} [2022-07-12 10:20:49,379 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 337 predicate places. [2022-07-12 10:20:49,379 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 687 transitions, 12225 flow [2022-07-12 10:20:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:49,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:49,379 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:20:49,380 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1004739636, now seen corresponding path program 13 times [2022-07-12 10:20:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650396162] [2022-07-12 10:20:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:49,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650396162] [2022-07-12 10:20:49,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650396162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:49,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:49,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:49,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937799061] [2022-07-12 10:20:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:49,831 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:20:49,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 687 transitions, 12225 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:49,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:49,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:20:49,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:52,577 INFO L129 PetriNetUnfolder]: 5212/10019 cut-off events. [2022-07-12 10:20:52,578 INFO L130 PetriNetUnfolder]: For 102665/102684 co-relation queries the response was YES. [2022-07-12 10:20:52,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52165 conditions, 10019 events. 5212/10019 cut-off events. For 102665/102684 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 84192 event pairs, 1285 based on Foata normal form. 24/9956 useless extension candidates. Maximal degree in co-relation 52053. Up to 5642 conditions per place. [2022-07-12 10:20:52,720 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 402 selfloop transitions, 242 changer transitions 5/737 dead transitions. [2022-07-12 10:20:52,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 737 transitions, 13852 flow [2022-07-12 10:20:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:20:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:20:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2675 transitions. [2022-07-12 10:20:52,722 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5912908930150309 [2022-07-12 10:20:52,723 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2675 transitions. [2022-07-12 10:20:52,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2675 transitions. [2022-07-12 10:20:52,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:52,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2675 transitions. [2022-07-12 10:20:52,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.88461538461539) internal successors, (2675), 26 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:52,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:52,727 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:52,727 INFO L186 Difference]: Start difference. First operand has 492 places, 687 transitions, 12225 flow. Second operand 26 states and 2675 transitions. [2022-07-12 10:20:52,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 737 transitions, 13852 flow [2022-07-12 10:20:53,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 737 transitions, 13501 flow, removed 6 selfloop flow, removed 22 redundant places. [2022-07-12 10:20:53,247 INFO L242 Difference]: Finished difference. Result has 497 places, 681 transitions, 12300 flow [2022-07-12 10:20:53,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11797, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12300, PETRI_PLACES=497, PETRI_TRANSITIONS=681} [2022-07-12 10:20:53,248 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 342 predicate places. [2022-07-12 10:20:53,248 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 681 transitions, 12300 flow [2022-07-12 10:20:53,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:53,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:53,249 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:53,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-12 10:20:53,249 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -105582696, now seen corresponding path program 14 times [2022-07-12 10:20:53,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:53,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730348880] [2022-07-12 10:20:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:53,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:53,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:53,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730348880] [2022-07-12 10:20:53,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730348880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:53,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:53,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:20:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193108630] [2022-07-12 10:20:53,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:53,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:20:53,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:20:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:20:53,638 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:20:53,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 681 transitions, 12300 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:53,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:53,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:20:53,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:56,674 INFO L129 PetriNetUnfolder]: 5362/10277 cut-off events. [2022-07-12 10:20:56,674 INFO L130 PetriNetUnfolder]: For 109996/110015 co-relation queries the response was YES. [2022-07-12 10:20:56,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53522 conditions, 10277 events. 5362/10277 cut-off events. For 109996/110015 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 86641 event pairs, 1286 based on Foata normal form. 80/10265 useless extension candidates. Maximal degree in co-relation 53410. Up to 5404 conditions per place. [2022-07-12 10:20:56,809 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 364 selfloop transitions, 307 changer transitions 0/759 dead transitions. [2022-07-12 10:20:56,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 759 transitions, 14106 flow [2022-07-12 10:20:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:20:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:20:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2992 transitions. [2022-07-12 10:20:56,812 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5929449068569164 [2022-07-12 10:20:56,812 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2992 transitions. [2022-07-12 10:20:56,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2992 transitions. [2022-07-12 10:20:56,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:56,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2992 transitions. [2022-07-12 10:20:56,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.17241379310344) internal successors, (2992), 29 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:56,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:56,817 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:56,817 INFO L186 Difference]: Start difference. First operand has 497 places, 681 transitions, 12300 flow. Second operand 29 states and 2992 transitions. [2022-07-12 10:20:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 759 transitions, 14106 flow [2022-07-12 10:20:57,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 759 transitions, 13515 flow, removed 6 selfloop flow, removed 26 redundant places. [2022-07-12 10:20:57,407 INFO L242 Difference]: Finished difference. Result has 505 places, 687 transitions, 12670 flow [2022-07-12 10:20:57,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11328, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12670, PETRI_PLACES=505, PETRI_TRANSITIONS=687} [2022-07-12 10:20:57,408 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 350 predicate places. [2022-07-12 10:20:57,408 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 687 transitions, 12670 flow [2022-07-12 10:20:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:57,409 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:57,409 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:57,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-12 10:20:57,409 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1438483448, now seen corresponding path program 15 times [2022-07-12 10:20:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:57,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550748150] [2022-07-12 10:20:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:57,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:20:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:57,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550748150] [2022-07-12 10:20:57,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550748150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:57,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:57,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-12 10:20:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859140945] [2022-07-12 10:20:57,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:57,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:20:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:20:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:20:57,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:20:57,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 687 transitions, 12670 flow. Second operand has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:57,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:57,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:20:57,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:00,675 INFO L129 PetriNetUnfolder]: 5081/9718 cut-off events. [2022-07-12 10:21:00,675 INFO L130 PetriNetUnfolder]: For 106078/106097 co-relation queries the response was YES. [2022-07-12 10:21:00,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51633 conditions, 9718 events. 5081/9718 cut-off events. For 106078/106097 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 81104 event pairs, 1293 based on Foata normal form. 80/9702 useless extension candidates. Maximal degree in co-relation 51518. Up to 5087 conditions per place. [2022-07-12 10:21:00,820 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 350 selfloop transitions, 303 changer transitions 0/741 dead transitions. [2022-07-12 10:21:00,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 741 transitions, 13916 flow [2022-07-12 10:21:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:21:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-12 10:21:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2888 transitions. [2022-07-12 10:21:00,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5927750410509032 [2022-07-12 10:21:00,822 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2888 transitions. [2022-07-12 10:21:00,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2888 transitions. [2022-07-12 10:21:00,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:00,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2888 transitions. [2022-07-12 10:21:00,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 103.14285714285714) internal successors, (2888), 28 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:00,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:00,827 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:00,827 INFO L186 Difference]: Start difference. First operand has 505 places, 687 transitions, 12670 flow. Second operand 28 states and 2888 transitions. [2022-07-12 10:21:00,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 741 transitions, 13916 flow [2022-07-12 10:21:01,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 741 transitions, 13475 flow, removed 8 selfloop flow, removed 28 redundant places. [2022-07-12 10:21:01,340 INFO L242 Difference]: Finished difference. Result has 502 places, 670 transitions, 12462 flow [2022-07-12 10:21:01,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11444, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12462, PETRI_PLACES=502, PETRI_TRANSITIONS=670} [2022-07-12 10:21:01,341 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 347 predicate places. [2022-07-12 10:21:01,342 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 670 transitions, 12462 flow [2022-07-12 10:21:01,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:01,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:01,342 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:01,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-12 10:21:01,343 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:01,343 INFO L85 PathProgramCache]: Analyzing trace with hash 139634646, now seen corresponding path program 11 times [2022-07-12 10:21:01,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:01,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717700220] [2022-07-12 10:21:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:01,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717700220] [2022-07-12 10:21:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717700220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:01,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:01,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:21:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712842675] [2022-07-12 10:21:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:21:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:21:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:21:01,736 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:21:01,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 670 transitions, 12462 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:01,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:01,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:21:01,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:04,529 INFO L129 PetriNetUnfolder]: 5093/9729 cut-off events. [2022-07-12 10:21:04,529 INFO L130 PetriNetUnfolder]: For 110217/110236 co-relation queries the response was YES. [2022-07-12 10:21:04,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52436 conditions, 9729 events. 5093/9729 cut-off events. For 110217/110236 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 80975 event pairs, 1331 based on Foata normal form. 14/9643 useless extension candidates. Maximal degree in co-relation 52322. Up to 5601 conditions per place. [2022-07-12 10:21:04,674 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 365 selfloop transitions, 276 changer transitions 2/731 dead transitions. [2022-07-12 10:21:04,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 731 transitions, 14200 flow [2022-07-12 10:21:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:21:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:21:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2973 transitions. [2022-07-12 10:21:04,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5891795481569561 [2022-07-12 10:21:04,677 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2973 transitions. [2022-07-12 10:21:04,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2973 transitions. [2022-07-12 10:21:04,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:04,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2973 transitions. [2022-07-12 10:21:04,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.51724137931035) internal successors, (2973), 29 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:04,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:04,682 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:04,682 INFO L186 Difference]: Start difference. First operand has 502 places, 670 transitions, 12462 flow. Second operand 29 states and 2973 transitions. [2022-07-12 10:21:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 731 transitions, 14200 flow [2022-07-12 10:21:05,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 731 transitions, 13838 flow, removed 6 selfloop flow, removed 23 redundant places. [2022-07-12 10:21:05,199 INFO L242 Difference]: Finished difference. Result has 510 places, 675 transitions, 12864 flow [2022-07-12 10:21:05,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12106, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12864, PETRI_PLACES=510, PETRI_TRANSITIONS=675} [2022-07-12 10:21:05,200 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 355 predicate places. [2022-07-12 10:21:05,200 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 675 transitions, 12864 flow [2022-07-12 10:21:05,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:05,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:05,201 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:21:05,201 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -155629712, now seen corresponding path program 12 times [2022-07-12 10:21:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:05,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072474052] [2022-07-12 10:21:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072474052] [2022-07-12 10:21:05,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072474052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:05,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:05,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137683390] [2022-07-12 10:21:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:05,607 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-12 10:21:05,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 675 transitions, 12864 flow. Second operand has 20 states, 20 states have (on average 101.7) internal successors, (2034), 20 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:05,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:05,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-12 10:21:05,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:08,272 INFO L129 PetriNetUnfolder]: 5101/9783 cut-off events. [2022-07-12 10:21:08,272 INFO L130 PetriNetUnfolder]: For 114891/114910 co-relation queries the response was YES. [2022-07-12 10:21:08,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52908 conditions, 9783 events. 5101/9783 cut-off events. For 114891/114910 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 82055 event pairs, 1330 based on Foata normal form. 16/9701 useless extension candidates. Maximal degree in co-relation 52794. Up to 5599 conditions per place. [2022-07-12 10:21:08,419 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 405 selfloop transitions, 223 changer transitions 15/733 dead transitions. [2022-07-12 10:21:08,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 733 transitions, 14580 flow [2022-07-12 10:21:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:21:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-12 10:21:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2944 transitions. [2022-07-12 10:21:08,422 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6042692939244664 [2022-07-12 10:21:08,422 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2944 transitions. [2022-07-12 10:21:08,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2944 transitions. [2022-07-12 10:21:08,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:08,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2944 transitions. [2022-07-12 10:21:08,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.14285714285714) internal successors, (2944), 28 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:08,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:08,427 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:08,427 INFO L186 Difference]: Start difference. First operand has 510 places, 675 transitions, 12864 flow. Second operand 28 states and 2944 transitions. [2022-07-12 10:21:08,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 733 transitions, 14580 flow [2022-07-12 10:21:09,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 733 transitions, 14276 flow, removed 2 selfloop flow, removed 20 redundant places. [2022-07-12 10:21:09,310 INFO L242 Difference]: Finished difference. Result has 519 places, 670 transitions, 12921 flow [2022-07-12 10:21:09,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12566, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12921, PETRI_PLACES=519, PETRI_TRANSITIONS=670} [2022-07-12 10:21:09,312 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 364 predicate places. [2022-07-12 10:21:09,312 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 670 transitions, 12921 flow [2022-07-12 10:21:09,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.7) internal successors, (2034), 20 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:09,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:09,313 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:09,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 10:21:09,313 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1021973906, now seen corresponding path program 13 times [2022-07-12 10:21:09,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094559996] [2022-07-12 10:21:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:09,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094559996] [2022-07-12 10:21:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094559996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:09,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:09,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777313141] [2022-07-12 10:21:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:09,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:21:09,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 670 transitions, 12921 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:09,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:09,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:21:09,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:12,667 INFO L129 PetriNetUnfolder]: 5095/9747 cut-off events. [2022-07-12 10:21:12,667 INFO L130 PetriNetUnfolder]: For 119452/119471 co-relation queries the response was YES. [2022-07-12 10:21:12,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52860 conditions, 9747 events. 5095/9747 cut-off events. For 119452/119471 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 81441 event pairs, 1347 based on Foata normal form. 20/9673 useless extension candidates. Maximal degree in co-relation 52745. Up to 5601 conditions per place. [2022-07-12 10:21:12,789 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 364 selfloop transitions, 268 changer transitions 0/720 dead transitions. [2022-07-12 10:21:12,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 720 transitions, 14541 flow [2022-07-12 10:21:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:21:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:21:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2771 transitions. [2022-07-12 10:21:12,791 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5898254576415496 [2022-07-12 10:21:12,791 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2771 transitions. [2022-07-12 10:21:12,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2771 transitions. [2022-07-12 10:21:12,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:12,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2771 transitions. [2022-07-12 10:21:12,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.62962962962963) internal successors, (2771), 27 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:12,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:12,796 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:12,796 INFO L186 Difference]: Start difference. First operand has 519 places, 670 transitions, 12921 flow. Second operand 27 states and 2771 transitions. [2022-07-12 10:21:12,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 720 transitions, 14541 flow [2022-07-12 10:21:13,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 720 transitions, 14236 flow, removed 6 selfloop flow, removed 26 redundant places. [2022-07-12 10:21:13,301 INFO L242 Difference]: Finished difference. Result has 517 places, 674 transitions, 13431 flow [2022-07-12 10:21:13,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12618, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13431, PETRI_PLACES=517, PETRI_TRANSITIONS=674} [2022-07-12 10:21:13,302 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 362 predicate places. [2022-07-12 10:21:13,303 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 674 transitions, 13431 flow [2022-07-12 10:21:13,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:13,303 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:13,303 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-12 10:21:13,303 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash -114799758, now seen corresponding path program 14 times [2022-07-12 10:21:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018083902] [2022-07-12 10:21:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018083902] [2022-07-12 10:21:13,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018083902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:13,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:13,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:13,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069313596] [2022-07-12 10:21:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:13,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:13,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:13,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:13,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:13,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:21:13,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 674 transitions, 13431 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:13,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:13,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:21:13,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:16,472 INFO L129 PetriNetUnfolder]: 5053/9670 cut-off events. [2022-07-12 10:21:16,478 INFO L130 PetriNetUnfolder]: For 121418/121437 co-relation queries the response was YES. [2022-07-12 10:21:16,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52741 conditions, 9670 events. 5053/9670 cut-off events. For 121418/121437 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 80646 event pairs, 1335 based on Foata normal form. 20/9594 useless extension candidates. Maximal degree in co-relation 52626. Up to 5601 conditions per place. [2022-07-12 10:21:16,599 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 377 selfloop transitions, 246 changer transitions 1/712 dead transitions. [2022-07-12 10:21:16,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 712 transitions, 14640 flow [2022-07-12 10:21:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:21:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:21:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2775 transitions. [2022-07-12 10:21:16,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.590676883780332 [2022-07-12 10:21:16,602 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2775 transitions. [2022-07-12 10:21:16,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2775 transitions. [2022-07-12 10:21:16,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:16,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2775 transitions. [2022-07-12 10:21:16,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.77777777777777) internal successors, (2775), 27 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,607 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,607 INFO L186 Difference]: Start difference. First operand has 517 places, 674 transitions, 13431 flow. Second operand 27 states and 2775 transitions. [2022-07-12 10:21:16,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 712 transitions, 14640 flow [2022-07-12 10:21:17,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 712 transitions, 14374 flow, removed 1 selfloop flow, removed 20 redundant places. [2022-07-12 10:21:17,144 INFO L242 Difference]: Finished difference. Result has 524 places, 665 transitions, 13432 flow [2022-07-12 10:21:17,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12893, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13432, PETRI_PLACES=524, PETRI_TRANSITIONS=665} [2022-07-12 10:21:17,146 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 369 predicate places. [2022-07-12 10:21:17,146 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 665 transitions, 13432 flow [2022-07-12 10:21:17,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:17,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:17,147 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-12 10:21:17,147 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1673431212, now seen corresponding path program 15 times [2022-07-12 10:21:17,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:17,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727576736] [2022-07-12 10:21:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:17,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727576736] [2022-07-12 10:21:17,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727576736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:17,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:17,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:21:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145036709] [2022-07-12 10:21:17,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:17,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:21:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:21:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:21:17,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:21:17,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 665 transitions, 13432 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:17,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:17,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:21:17,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:20,405 INFO L129 PetriNetUnfolder]: 5049/9687 cut-off events. [2022-07-12 10:21:20,405 INFO L130 PetriNetUnfolder]: For 127990/128009 co-relation queries the response was YES. [2022-07-12 10:21:20,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53030 conditions, 9687 events. 5049/9687 cut-off events. For 127990/128009 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 81113 event pairs, 1323 based on Foata normal form. 16/9608 useless extension candidates. Maximal degree in co-relation 52915. Up to 5601 conditions per place. [2022-07-12 10:21:20,524 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 402 selfloop transitions, 214 changer transitions 9/713 dead transitions. [2022-07-12 10:21:20,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 713 transitions, 14973 flow [2022-07-12 10:21:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:21:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:21:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2666 transitions. [2022-07-12 10:21:20,526 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5893015030946065 [2022-07-12 10:21:20,526 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2666 transitions. [2022-07-12 10:21:20,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2666 transitions. [2022-07-12 10:21:20,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:20,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2666 transitions. [2022-07-12 10:21:20,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.53846153846153) internal successors, (2666), 26 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,531 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,531 INFO L186 Difference]: Start difference. First operand has 524 places, 665 transitions, 13432 flow. Second operand 26 states and 2666 transitions. [2022-07-12 10:21:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 713 transitions, 14973 flow [2022-07-12 10:21:21,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 713 transitions, 14608 flow, removed 0 selfloop flow, removed 21 redundant places. [2022-07-12 10:21:21,132 INFO L242 Difference]: Finished difference. Result has 529 places, 661 transitions, 13404 flow [2022-07-12 10:21:21,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=13067, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13404, PETRI_PLACES=529, PETRI_TRANSITIONS=661} [2022-07-12 10:21:21,133 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 374 predicate places. [2022-07-12 10:21:21,133 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 661 transitions, 13404 flow [2022-07-12 10:21:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:21,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:21,134 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:21,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-12 10:21:21,135 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1484762420, now seen corresponding path program 16 times [2022-07-12 10:21:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678452429] [2022-07-12 10:21:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:21,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:21,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:21,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678452429] [2022-07-12 10:21:21,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678452429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:21,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:21,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:21:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147409548] [2022-07-12 10:21:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:21,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:21:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:21:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:21:21,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-12 10:21:21,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 661 transitions, 13404 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:21,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:21,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-12 10:21:21,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:24,536 INFO L129 PetriNetUnfolder]: 5001/9590 cut-off events. [2022-07-12 10:21:24,536 INFO L130 PetriNetUnfolder]: For 125148/125167 co-relation queries the response was YES. [2022-07-12 10:21:24,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52413 conditions, 9590 events. 5001/9590 cut-off events. For 125148/125167 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 79984 event pairs, 1367 based on Foata normal form. 16/9508 useless extension candidates. Maximal degree in co-relation 52298. Up to 5601 conditions per place. [2022-07-12 10:21:24,661 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 393 selfloop transitions, 217 changer transitions 9/707 dead transitions. [2022-07-12 10:21:24,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 707 transitions, 14867 flow [2022-07-12 10:21:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:21:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:21:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2662 transitions. [2022-07-12 10:21:24,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5884173297966402 [2022-07-12 10:21:24,664 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2662 transitions. [2022-07-12 10:21:24,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2662 transitions. [2022-07-12 10:21:24,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:24,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2662 transitions. [2022-07-12 10:21:24,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.38461538461539) internal successors, (2662), 26 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:24,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:24,670 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:24,670 INFO L186 Difference]: Start difference. First operand has 529 places, 661 transitions, 13404 flow. Second operand 26 states and 2662 transitions. [2022-07-12 10:21:24,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 707 transitions, 14867 flow [2022-07-12 10:21:25,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 707 transitions, 14459 flow, removed 2 selfloop flow, removed 28 redundant places. [2022-07-12 10:21:25,169 INFO L242 Difference]: Finished difference. Result has 525 places, 655 transitions, 13281 flow [2022-07-12 10:21:25,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12930, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13281, PETRI_PLACES=525, PETRI_TRANSITIONS=655} [2022-07-12 10:21:25,170 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 370 predicate places. [2022-07-12 10:21:25,171 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 655 transitions, 13281 flow [2022-07-12 10:21:25,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:25,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:25,171 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:25,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-12 10:21:25,172 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:25,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1571051632, now seen corresponding path program 17 times [2022-07-12 10:21:25,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:25,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614804904] [2022-07-12 10:21:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:25,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614804904] [2022-07-12 10:21:25,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614804904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159152463] [2022-07-12 10:21:25,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:21:25,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:25,688 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) [2022-07-12 10:21:25,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:21:25,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:21:25,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:21:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 10:21:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:25,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-12 10:21:25,819 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 10:21:25,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2022-07-12 10:21:25,979 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-12 10:21:25,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 10:21:26,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:21:26,478 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-12 10:21:26,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 10:21:26,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-07-12 10:21:26,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:21:26,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 10:21:26,844 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:21:26,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-07-12 10:21:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:26,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:26,985 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_747 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork0_#t~mem1|) (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))))))) is different from false [2022-07-12 10:21:27,036 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_747 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747))) (let ((.cse0 (select .cse3 ~B~0.base))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select .cse0 (+ ~B~0.offset .cse1)) (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1)))) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse2 ~B~0.offset)) (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse2))))))))) is different from false [2022-07-12 10:21:27,052 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (v_ArrVal_747 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_746))) (let ((.cse0 (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset))))) (let ((.cse3 (* c_~i_AB~0 4))) (= (select .cse2 (+ ~B~0.offset .cse3)) (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse3))))))))) is different from false [2022-07-12 10:21:27,122 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (v_ArrVal_745 (Array Int Int)) (v_ArrVal_747 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_746))) (let ((.cse0 (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset))))) (let ((.cse4 (* c_~i_AB~0 4))) (= (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse4)) (select .cse2 (+ ~B~0.offset .cse4))))))))) is different from false [2022-07-12 10:21:27,164 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (v_ArrVal_745 (Array Int Int)) (v_ArrVal_747 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_746))) (let ((.cse0 (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset))))) (let ((.cse3 (* c_~i_AB~0 4))) (= (select .cse2 (+ ~B~0.offset .cse3)) (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse3))))))))) is different from false