./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/popl20-more-dec-subseq.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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:47:27,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:47:27,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:47:27,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:47:27,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:47:27,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:47:27,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:47:27,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:47:27,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:47:27,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:47:27,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:47:27,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:47:27,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:47:27,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:47:27,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:47:27,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:47:27,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:47:27,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:47:27,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:47:27,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:47:27,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:47:27,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:47:27,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:47:27,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:47:27,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:47:27,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:47:27,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:47:27,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:47:27,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:47:27,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:47:27,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:47:27,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:47:27,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:47:27,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:47:27,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:47:27,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:47:27,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:47:27,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:47:27,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:47:27,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:47:27,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:47:27,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:47:27,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:47:27,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:47:27,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:47:27,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:47:27,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:47:27,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:47:27,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:47:27,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:47:27,185 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:47:27,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:47:27,185 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:47:27,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:47:27,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:47:27,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:47:27,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:47:27,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:47:27,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:47:27,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:47:27,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:47:27,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:47:27,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:47:27,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:47:27,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:47:27,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:47:27,189 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:47:27,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:47:27,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:47:27,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:47:27,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2021-12-22 13:47:27,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:47:27,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:47:27,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:47:27,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:47:27,391 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:47:27,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-12-22 13:47:27,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe8d4ddc8/9fa2321e663841d186ea0bc1d9a17fce/FLAG7ddcbcf19 [2021-12-22 13:47:27,751 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:47:27,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-12-22 13:47:27,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe8d4ddc8/9fa2321e663841d186ea0bc1d9a17fce/FLAG7ddcbcf19 [2021-12-22 13:47:28,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe8d4ddc8/9fa2321e663841d186ea0bc1d9a17fce [2021-12-22 13:47:28,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:47:28,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:47:28,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:47:28,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:47:28,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:47:28,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c724b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28, skipping insertion in model container [2021-12-22 13:47:28,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:47:28,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:47:28,346 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/popl20-more-dec-subseq.wvr.c[2924,2937] [2021-12-22 13:47:28,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:47:28,357 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:47:28,371 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/popl20-more-dec-subseq.wvr.c[2924,2937] [2021-12-22 13:47:28,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:47:28,382 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:47:28,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28 WrapperNode [2021-12-22 13:47:28,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:47:28,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:47:28,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:47:28,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:47:28,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,409 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2021-12-22 13:47:28,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:47:28,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:47:28,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:47:28,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:47:28,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:47:28,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:47:28,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:47:28,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:47:28,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (1/1) ... [2021-12-22 13:47:28,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:47:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:28,496 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) [2021-12-22 13:47:28,500 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 [2021-12-22 13:47:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:47:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:47:28,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:47:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:47:28,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:47:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:47:28,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:47:28,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:47:28,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:47:28,523 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:47:28,622 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:47:28,623 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:47:28,913 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:47:28,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:47:28,959 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 13:47:28,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:47:28 BoogieIcfgContainer [2021-12-22 13:47:28,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:47:28,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:47:28,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:47:28,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:47:28,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:47:28" (1/3) ... [2021-12-22 13:47:28,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bddaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:47:28, skipping insertion in model container [2021-12-22 13:47:28,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:47:28" (2/3) ... [2021-12-22 13:47:28,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bddaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:47:28, skipping insertion in model container [2021-12-22 13:47:28,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:47:28" (3/3) ... [2021-12-22 13:47:28,967 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2021-12-22 13:47:28,970 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:47:28,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:47:28,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:47:28,971 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:47:29,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,018 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,018 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,018 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:47:29,020 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:47:29,053 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:47:29,062 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:47:29,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:47:29,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2021-12-22 13:47:29,152 INFO L129 PetriNetUnfolder]: 15/187 cut-off events. [2021-12-22 13:47:29,153 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:47:29,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2021-12-22 13:47:29,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2021-12-22 13:47:29,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2021-12-22 13:47:29,201 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2021-12-22 13:47:29,202 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:47:29,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:29,203 INFO L254 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] [2021-12-22 13:47:29,203 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:29,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1982625687, now seen corresponding path program 1 times [2021-12-22 13:47:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:29,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766749591] [2021-12-22 13:47:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:29,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:29,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:29,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766749591] [2021-12-22 13:47:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766749591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:29,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:29,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:47:29,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147067406] [2021-12-22 13:47:29,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:29,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:47:29,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:47:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:47:29,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 189 [2021-12-22 13:47:29,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:29,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 189 [2021-12-22 13:47:29,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:29,463 INFO L129 PetriNetUnfolder]: 14/193 cut-off events. [2021-12-22 13:47:29,464 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-22 13:47:29,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 193 events. 14/193 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 168 event pairs, 3 based on Foata normal form. 15/195 useless extension candidates. Maximal degree in co-relation 147. Up to 20 conditions per place. [2021-12-22 13:47:29,477 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 7 selfloop transitions, 0 changer transitions 6/168 dead transitions. [2021-12-22 13:47:29,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 362 flow [2021-12-22 13:47:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:47:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:47:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 359 transitions. [2021-12-22 13:47:29,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9497354497354498 [2021-12-22 13:47:29,495 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 359 transitions. [2021-12-22 13:47:29,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 359 transitions. [2021-12-22 13:47:29,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:29,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 359 transitions. [2021-12-22 13:47:29,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,508 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,509 INFO L186 Difference]: Start difference. First operand has 170 places, 178 transitions, 368 flow. Second operand 2 states and 359 transitions. [2021-12-22 13:47:29,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 362 flow [2021-12-22 13:47:29,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:47:29,516 INFO L242 Difference]: Finished difference. Result has 167 places, 162 transitions, 328 flow [2021-12-22 13:47:29,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2021-12-22 13:47:29,521 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2021-12-22 13:47:29,521 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 328 flow [2021-12-22 13:47:29,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,522 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:29,522 INFO L254 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] [2021-12-22 13:47:29,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:47:29,523 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -955987473, now seen corresponding path program 1 times [2021-12-22 13:47:29,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:29,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354361959] [2021-12-22 13:47:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:29,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:29,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354361959] [2021-12-22 13:47:29,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354361959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:29,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:29,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:47:29,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780436887] [2021-12-22 13:47:29,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:29,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:47:29,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:47:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:47:29,838 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 189 [2021-12-22 13:47:29,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:29,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 189 [2021-12-22 13:47:29,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:29,985 INFO L129 PetriNetUnfolder]: 56/309 cut-off events. [2021-12-22 13:47:29,985 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:47:29,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 309 events. 56/309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 860 event pairs, 12 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 445. Up to 64 conditions per place. [2021-12-22 13:47:29,988 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 45 selfloop transitions, 5 changer transitions 0/171 dead transitions. [2021-12-22 13:47:29,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 171 transitions, 447 flow [2021-12-22 13:47:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:47:29,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:47:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 837 transitions. [2021-12-22 13:47:29,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2021-12-22 13:47:29,991 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 837 transitions. [2021-12-22 13:47:29,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 837 transitions. [2021-12-22 13:47:29,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:29,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 837 transitions. [2021-12-22 13:47:29,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,997 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:29,997 INFO L186 Difference]: Start difference. First operand has 167 places, 162 transitions, 328 flow. Second operand 6 states and 837 transitions. [2021-12-22 13:47:29,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 171 transitions, 447 flow [2021-12-22 13:47:29,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 171 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:47:30,004 INFO L242 Difference]: Finished difference. Result has 167 places, 163 transitions, 346 flow [2021-12-22 13:47:30,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2021-12-22 13:47:30,005 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2021-12-22 13:47:30,005 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 346 flow [2021-12-22 13:47:30,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:30,006 INFO L254 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] [2021-12-22 13:47:30,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:47:30,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1324649205, now seen corresponding path program 1 times [2021-12-22 13:47:30,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:30,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551861794] [2021-12-22 13:47:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:30,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:47:30,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551861794] [2021-12-22 13:47:30,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551861794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:30,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:30,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:47:30,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464090809] [2021-12-22 13:47:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:30,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:47:30,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:47:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:47:30,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 189 [2021-12-22 13:47:30,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:30,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 189 [2021-12-22 13:47:30,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:30,260 INFO L129 PetriNetUnfolder]: 57/353 cut-off events. [2021-12-22 13:47:30,260 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-22 13:47:30,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 353 events. 57/353 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 963 event pairs, 12 based on Foata normal form. 4/338 useless extension candidates. Maximal degree in co-relation 525. Up to 60 conditions per place. [2021-12-22 13:47:30,262 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 46 selfloop transitions, 8 changer transitions 7/182 dead transitions. [2021-12-22 13:47:30,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 182 transitions, 511 flow [2021-12-22 13:47:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:47:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:47:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2021-12-22 13:47:30,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658730158730159 [2021-12-22 13:47:30,269 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2021-12-22 13:47:30,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2021-12-22 13:47:30,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:30,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2021-12-22 13:47:30,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,275 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,275 INFO L186 Difference]: Start difference. First operand has 167 places, 163 transitions, 346 flow. Second operand 8 states and 1158 transitions. [2021-12-22 13:47:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 182 transitions, 511 flow [2021-12-22 13:47:30,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 182 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:47:30,279 INFO L242 Difference]: Finished difference. Result has 172 places, 164 transitions, 364 flow [2021-12-22 13:47:30,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=172, PETRI_TRANSITIONS=164} [2021-12-22 13:47:30,281 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2021-12-22 13:47:30,281 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 164 transitions, 364 flow [2021-12-22 13:47:30,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,282 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:30,282 INFO L254 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, 1, 1, 1, 1, 1] [2021-12-22 13:47:30,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:47:30,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 195954356, now seen corresponding path program 1 times [2021-12-22 13:47:30,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505226424] [2021-12-22 13:47:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:30,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:30,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:30,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505226424] [2021-12-22 13:47:30,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505226424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:30,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:30,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:47:30,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744979122] [2021-12-22 13:47:30,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:30,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:47:30,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:47:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:47:30,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 189 [2021-12-22 13:47:30,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 164 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:30,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 189 [2021-12-22 13:47:30,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:30,483 INFO L129 PetriNetUnfolder]: 156/581 cut-off events. [2021-12-22 13:47:30,483 INFO L130 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2021-12-22 13:47:30,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 581 events. 156/581 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2614 event pairs, 14 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 959. Up to 141 conditions per place. [2021-12-22 13:47:30,487 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 44 selfloop transitions, 11 changer transitions 0/194 dead transitions. [2021-12-22 13:47:30,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 194 transitions, 558 flow [2021-12-22 13:47:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:47:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:47:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2021-12-22 13:47:30,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.870899470899471 [2021-12-22 13:47:30,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2021-12-22 13:47:30,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2021-12-22 13:47:30,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:30,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2021-12-22 13:47:30,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,493 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,493 INFO L186 Difference]: Start difference. First operand has 172 places, 164 transitions, 364 flow. Second operand 5 states and 823 transitions. [2021-12-22 13:47:30,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 194 transitions, 558 flow [2021-12-22 13:47:30,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 194 transitions, 534 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-22 13:47:30,497 INFO L242 Difference]: Finished difference. Result has 172 places, 174 transitions, 437 flow [2021-12-22 13:47:30,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=437, PETRI_PLACES=172, PETRI_TRANSITIONS=174} [2021-12-22 13:47:30,498 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2021-12-22 13:47:30,498 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 174 transitions, 437 flow [2021-12-22 13:47:30,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,499 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:30,499 INFO L254 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, 1, 1, 1, 1, 1] [2021-12-22 13:47:30,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:47:30,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -118877064, now seen corresponding path program 2 times [2021-12-22 13:47:30,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788184071] [2021-12-22 13:47:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:30,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:47:30,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:30,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788184071] [2021-12-22 13:47:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788184071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:30,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:30,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:47:30,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065930897] [2021-12-22 13:47:30,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:30,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:47:30,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:47:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:47:30,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 189 [2021-12-22 13:47:30,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 174 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:30,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 189 [2021-12-22 13:47:30,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:30,705 INFO L129 PetriNetUnfolder]: 106/528 cut-off events. [2021-12-22 13:47:30,705 INFO L130 PetriNetUnfolder]: For 329/354 co-relation queries the response was YES. [2021-12-22 13:47:30,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 528 events. 106/528 cut-off events. For 329/354 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2386 event pairs, 13 based on Foata normal form. 8/517 useless extension candidates. Maximal degree in co-relation 985. Up to 100 conditions per place. [2021-12-22 13:47:30,708 INFO L132 encePairwiseOnDemand]: 184/189 looper letters, 51 selfloop transitions, 2 changer transitions 4/190 dead transitions. [2021-12-22 13:47:30,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 190 transitions, 630 flow [2021-12-22 13:47:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:47:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:47:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2021-12-22 13:47:30,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7767195767195767 [2021-12-22 13:47:30,709 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2021-12-22 13:47:30,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2021-12-22 13:47:30,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:30,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2021-12-22 13:47:30,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,712 INFO L186 Difference]: Start difference. First operand has 172 places, 174 transitions, 437 flow. Second operand 5 states and 734 transitions. [2021-12-22 13:47:30,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 190 transitions, 630 flow [2021-12-22 13:47:30,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 190 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:47:30,717 INFO L242 Difference]: Finished difference. Result has 179 places, 175 transitions, 453 flow [2021-12-22 13:47:30,717 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=179, PETRI_TRANSITIONS=175} [2021-12-22 13:47:30,717 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 9 predicate places. [2021-12-22 13:47:30,718 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 175 transitions, 453 flow [2021-12-22 13:47:30,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:30,718 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:47:30,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:47:30,718 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1098415054, now seen corresponding path program 1 times [2021-12-22 13:47:30,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:30,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864173190] [2021-12-22 13:47:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:30,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:47:30,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:30,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864173190] [2021-12-22 13:47:30,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864173190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:30,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:30,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:47:30,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472567446] [2021-12-22 13:47:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:30,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:47:30,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:47:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:47:30,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 189 [2021-12-22 13:47:30,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 175 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:30,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 189 [2021-12-22 13:47:30,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:30,836 INFO L129 PetriNetUnfolder]: 78/488 cut-off events. [2021-12-22 13:47:30,836 INFO L130 PetriNetUnfolder]: For 285/307 co-relation queries the response was YES. [2021-12-22 13:47:30,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 488 events. 78/488 cut-off events. For 285/307 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1978 event pairs, 9 based on Foata normal form. 11/481 useless extension candidates. Maximal degree in co-relation 880. Up to 106 conditions per place. [2021-12-22 13:47:30,838 INFO L132 encePairwiseOnDemand]: 186/189 looper letters, 29 selfloop transitions, 2 changer transitions 2/185 dead transitions. [2021-12-22 13:47:30,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 570 flow [2021-12-22 13:47:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:47:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:47:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2021-12-22 13:47:30,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.908289241622575 [2021-12-22 13:47:30,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2021-12-22 13:47:30,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2021-12-22 13:47:30,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:30,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2021-12-22 13:47:30,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,842 INFO L186 Difference]: Start difference. First operand has 179 places, 175 transitions, 453 flow. Second operand 3 states and 515 transitions. [2021-12-22 13:47:30,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 570 flow [2021-12-22 13:47:30,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 185 transitions, 564 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-22 13:47:30,846 INFO L242 Difference]: Finished difference. Result has 177 places, 176 transitions, 463 flow [2021-12-22 13:47:30,847 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2021-12-22 13:47:30,847 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 7 predicate places. [2021-12-22 13:47:30,847 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 463 flow [2021-12-22 13:47:30,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:30,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:30,848 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:47:30,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:47:30,848 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash 872199849, now seen corresponding path program 1 times [2021-12-22 13:47:30,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:30,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682957880] [2021-12-22 13:47:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:30,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:30,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682957880] [2021-12-22 13:47:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682957880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:47:30,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:47:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:47:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877637610] [2021-12-22 13:47:30,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:47:30,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:47:30,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:47:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:47:30,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 189 [2021-12-22 13:47:30,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 463 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 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) [2021-12-22 13:47:30,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:30,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 189 [2021-12-22 13:47:30,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:31,027 INFO L129 PetriNetUnfolder]: 77/620 cut-off events. [2021-12-22 13:47:31,028 INFO L130 PetriNetUnfolder]: For 368/401 co-relation queries the response was YES. [2021-12-22 13:47:31,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 620 events. 77/620 cut-off events. For 368/401 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2571 event pairs, 16 based on Foata normal form. 14/610 useless extension candidates. Maximal degree in co-relation 1125. Up to 110 conditions per place. [2021-12-22 13:47:31,030 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 38 selfloop transitions, 8 changer transitions 22/202 dead transitions. [2021-12-22 13:47:31,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 202 transitions, 685 flow [2021-12-22 13:47:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:47:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:47:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2021-12-22 13:47:31,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8001175778953556 [2021-12-22 13:47:31,033 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2021-12-22 13:47:31,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2021-12-22 13:47:31,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:31,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2021-12-22 13:47:31,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:31,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:31,038 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:31,038 INFO L186 Difference]: Start difference. First operand has 177 places, 176 transitions, 463 flow. Second operand 9 states and 1361 transitions. [2021-12-22 13:47:31,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 202 transitions, 685 flow [2021-12-22 13:47:31,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 202 transitions, 683 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:47:31,042 INFO L242 Difference]: Finished difference. Result has 186 places, 177 transitions, 489 flow [2021-12-22 13:47:31,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=186, PETRI_TRANSITIONS=177} [2021-12-22 13:47:31,042 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 16 predicate places. [2021-12-22 13:47:31,043 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 177 transitions, 489 flow [2021-12-22 13:47:31,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 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) [2021-12-22 13:47:31,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:31,043 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:47:31,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:47:31,044 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash -751624308, now seen corresponding path program 1 times [2021-12-22 13:47:31,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:31,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740030441] [2021-12-22 13:47:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:31,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:31,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740030441] [2021-12-22 13:47:31,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740030441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537247578] [2021-12-22 13:47:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:31,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:31,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:31,896 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) [2021-12-22 13:47:31,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:47:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-22 13:47:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:33,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 13:47:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:33,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:33,948 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-12-22 13:47:33,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 49 [2021-12-22 13:47:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:35,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537247578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:47:35,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:47:35,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 19] total 55 [2021-12-22 13:47:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113730582] [2021-12-22 13:47:35,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:47:35,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-22 13:47:35,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:47:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-22 13:47:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-12-22 13:47:35,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 189 [2021-12-22 13:47:35,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 177 transitions, 489 flow. Second operand has 55 states, 55 states have (on average 69.9090909090909) internal successors, (3845), 55 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:35,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:47:35,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 189 [2021-12-22 13:47:35,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:47:43,781 INFO L129 PetriNetUnfolder]: 8586/16879 cut-off events. [2021-12-22 13:47:43,781 INFO L130 PetriNetUnfolder]: For 11005/11005 co-relation queries the response was YES. [2021-12-22 13:47:43,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42431 conditions, 16879 events. 8586/16879 cut-off events. For 11005/11005 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 154462 event pairs, 608 based on Foata normal form. 34/16311 useless extension candidates. Maximal degree in co-relation 42417. Up to 2648 conditions per place. [2021-12-22 13:47:43,954 INFO L132 encePairwiseOnDemand]: 145/189 looper letters, 743 selfloop transitions, 240 changer transitions 247/1285 dead transitions. [2021-12-22 13:47:43,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1285 transitions, 7119 flow [2021-12-22 13:47:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-22 13:47:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-12-22 13:47:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 8605 transitions. [2021-12-22 13:47:43,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3924922459405218 [2021-12-22 13:47:43,972 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 8605 transitions. [2021-12-22 13:47:43,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 8605 transitions. [2021-12-22 13:47:43,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:47:43,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 8605 transitions. [2021-12-22 13:47:43,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 74.18103448275862) internal successors, (8605), 116 states have internal predecessors, (8605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:44,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 189.0) internal successors, (22113), 117 states have internal predecessors, (22113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:44,030 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 189.0) internal successors, (22113), 117 states have internal predecessors, (22113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:44,031 INFO L186 Difference]: Start difference. First operand has 186 places, 177 transitions, 489 flow. Second operand 116 states and 8605 transitions. [2021-12-22 13:47:44,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1285 transitions, 7119 flow [2021-12-22 13:47:44,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1285 transitions, 7085 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-12-22 13:47:44,062 INFO L242 Difference]: Finished difference. Result has 358 places, 435 transitions, 2587 flow [2021-12-22 13:47:44,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=2587, PETRI_PLACES=358, PETRI_TRANSITIONS=435} [2021-12-22 13:47:44,066 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 188 predicate places. [2021-12-22 13:47:44,066 INFO L470 AbstractCegarLoop]: Abstraction has has 358 places, 435 transitions, 2587 flow [2021-12-22 13:47:44,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 69.9090909090909) internal successors, (3845), 55 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:47:44,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:47:44,076 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:47:44,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:47:44,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:44,292 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:47:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:47:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1738378008, now seen corresponding path program 2 times [2021-12-22 13:47:44,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:47:44,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171634139] [2021-12-22 13:47:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:47:44,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:47:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:47:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:45,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:47:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171634139] [2021-12-22 13:47:45,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171634139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:47:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401601521] [2021-12-22 13:47:45,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:47:45,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:47:45,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:47:45,468 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) [2021-12-22 13:47:45,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:47:45,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:47:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:47:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-22 13:47:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:47:45,704 INFO L387 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 [2021-12-22 13:47:46,154 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 13:47:46,154 INFO L387 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 [2021-12-22 13:47:47,093 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:47:47,093 INFO L387 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 [2021-12-22 13:47:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:47:47,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 13:47:48,127 INFO L387 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 14 treesize of output 16 [2021-12-22 13:47:48,478 INFO L353 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-12-22 13:47:48,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-12-22 13:47:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:47:48,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:47:50,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:47:50,353 INFO L387 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 938 treesize of output 894 [2021-12-22 13:47:50,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:47:50,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 794 treesize of output 740 [2021-12-22 13:47:50,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:47:50,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 692 treesize of output 536 [2021-12-22 13:48:01,168 INFO L387 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 [2021-12-22 13:48:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:48:01,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401601521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:01,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:01,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 36, 32] total 89 [2021-12-22 13:48:01,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666419538] [2021-12-22 13:48:01,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:01,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-22 13:48:01,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-22 13:48:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=7044, Unknown=18, NotChecked=0, Total=7832 [2021-12-22 13:48:01,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 189 [2021-12-22 13:48:01,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 435 transitions, 2587 flow. Second operand has 89 states, 89 states have (on average 56.449438202247194) internal successors, (5024), 89 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:01,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:01,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 189 [2021-12-22 13:48:01,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:20,903 INFO L129 PetriNetUnfolder]: 14810/27391 cut-off events. [2021-12-22 13:48:20,904 INFO L130 PetriNetUnfolder]: For 189111/189239 co-relation queries the response was YES. [2021-12-22 13:48:21,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123788 conditions, 27391 events. 14810/27391 cut-off events. For 189111/189239 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 259033 event pairs, 2462 based on Foata normal form. 29/27365 useless extension candidates. Maximal degree in co-relation 123710. Up to 13044 conditions per place. [2021-12-22 13:48:21,529 INFO L132 encePairwiseOnDemand]: 128/189 looper letters, 1084 selfloop transitions, 603 changer transitions 45/1779 dead transitions. [2021-12-22 13:48:21,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1779 transitions, 16237 flow [2021-12-22 13:48:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-22 13:48:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-12-22 13:48:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 8360 transitions. [2021-12-22 13:48:21,568 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3093203093203093 [2021-12-22 13:48:21,569 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 8360 transitions. [2021-12-22 13:48:21,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 8360 transitions. [2021-12-22 13:48:21,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:21,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 8360 transitions. [2021-12-22 13:48:21,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 58.46153846153846) internal successors, (8360), 143 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 189.0) internal successors, (27216), 144 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,676 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 189.0) internal successors, (27216), 144 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,691 INFO L186 Difference]: Start difference. First operand has 358 places, 435 transitions, 2587 flow. Second operand 143 states and 8360 transitions. [2021-12-22 13:48:21,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1779 transitions, 16237 flow [2021-12-22 13:48:22,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1779 transitions, 14712 flow, removed 709 selfloop flow, removed 37 redundant places. [2021-12-22 13:48:22,823 INFO L242 Difference]: Finished difference. Result has 499 places, 1031 transitions, 8991 flow [2021-12-22 13:48:22,824 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=8991, PETRI_PLACES=499, PETRI_TRANSITIONS=1031} [2021-12-22 13:48:22,824 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 329 predicate places. [2021-12-22 13:48:22,824 INFO L470 AbstractCegarLoop]: Abstraction has has 499 places, 1031 transitions, 8991 flow [2021-12-22 13:48:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 56.449438202247194) internal successors, (5024), 89 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:22,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:22,826 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:22,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:48:23,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-22 13:48:23,044 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1982230238, now seen corresponding path program 3 times [2021-12-22 13:48:23,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114059579] [2021-12-22 13:48:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:23,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:48:24,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:24,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114059579] [2021-12-22 13:48:24,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114059579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:24,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418766326] [2021-12-22 13:48:24,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:48:24,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:24,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:24,013 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) [2021-12-22 13:48:24,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:48:24,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:48:24,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:48:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 13:48:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:48:25,652 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-22 13:48:25,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2021-12-22 13:48:25,659 INFO L387 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 27 treesize of output 15 [2021-12-22 13:48:25,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 13:48:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:48:25,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:26,386 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-12-22 13:48:26,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 68 [2021-12-22 13:48:26,390 INFO L387 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 29 treesize of output 23 [2021-12-22 13:48:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:48:27,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418766326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:27,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:27,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 74 [2021-12-22 13:48:27,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269632608] [2021-12-22 13:48:27,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:27,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-22 13:48:27,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-22 13:48:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=4891, Unknown=3, NotChecked=0, Total=5402 [2021-12-22 13:48:27,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 189 [2021-12-22 13:48:27,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1031 transitions, 8991 flow. Second operand has 74 states, 74 states have (on average 59.9054054054054) internal successors, (4433), 74 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:27,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:27,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 189 [2021-12-22 13:48:27,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand