./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/parallel-misc-5.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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:03:18,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:03:18,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:03:18,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:03:18,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:03:18,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:03:18,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:03:18,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:03:18,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:03:18,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:03:18,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:03:18,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:03:18,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:03:18,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:03:18,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:03:18,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:03:18,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:03:18,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:03:18,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:03:18,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:03:18,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:03:18,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:03:18,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:03:18,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:03:18,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:03:18,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:03:18,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:03:18,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:03:18,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:03:18,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:03:18,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:03:18,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:03:18,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:03:18,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:03:18,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:03:18,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:03:18,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:03:18,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:03:18,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:03:18,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:03:18,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:03:18,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:03:18,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:03:18,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:03:18,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:03:18,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:03:18,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:03:18,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:03:18,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:03:18,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:03:18,209 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:03:18,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:03:18,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:03:18,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:03:18,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:03:18,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:03:18,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:03:18,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:03:18,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:03:18,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:03:18,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:03:18,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:03:18,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:03:18,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:03:18,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:03:18,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:03:18,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:03:18,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:03:18,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:03:18,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a [2021-12-28 03:03:18,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:03:18,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:03:18,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:03:18,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:03:18,506 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:03:18,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2021-12-28 03:03:18,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6372538/52af9553a093462db28e4e0797abe306/FLAGde48f4caf [2021-12-28 03:03:18,923 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:03:18,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2021-12-28 03:03:18,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6372538/52af9553a093462db28e4e0797abe306/FLAGde48f4caf [2021-12-28 03:03:18,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6372538/52af9553a093462db28e4e0797abe306 [2021-12-28 03:03:18,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:03:18,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:03:18,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:03:18,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:03:18,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:03:18,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:03:18" (1/1) ... [2021-12-28 03:03:18,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215121f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:18, skipping insertion in model container [2021-12-28 03:03:18,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:03:18" (1/1) ... [2021-12-28 03:03:18,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:03:18,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:03:19,135 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/parallel-misc-5.wvr.c[3027,3040] [2021-12-28 03:03:19,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:03:19,151 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:03:19,205 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/parallel-misc-5.wvr.c[3027,3040] [2021-12-28 03:03:19,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:03:19,218 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:03:19,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19 WrapperNode [2021-12-28 03:03:19,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:03:19,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:03:19,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:03:19,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:03:19,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,267 INFO L137 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2021-12-28 03:03:19,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:03:19,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:03:19,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:03:19,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:03:19,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:03:19,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:03:19,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:03:19,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:03:19,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (1/1) ... [2021-12-28 03:03:19,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:03:19,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:19,333 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) [2021-12-28 03:03:19,344 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 [2021-12-28 03:03:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:03:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:03:19,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:03:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:03:19,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:03:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-28 03:03:19,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-28 03:03:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:03:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:03:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:03:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 03:03:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 03:03:19,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:03:19,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:03:19,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:03:19,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:03:19,371 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 03:03:19,427 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:03:19,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:03:19,642 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:03:19,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:03:19,689 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 03:03:19,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:03:19 BoogieIcfgContainer [2021-12-28 03:03:19,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:03:19,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:03:19,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:03:19,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:03:19,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:03:18" (1/3) ... [2021-12-28 03:03:19,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704eac9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:03:19, skipping insertion in model container [2021-12-28 03:03:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:19" (2/3) ... [2021-12-28 03:03:19,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704eac9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:03:19, skipping insertion in model container [2021-12-28 03:03:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:03:19" (3/3) ... [2021-12-28 03:03:19,697 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2021-12-28 03:03:19,703 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:03:19,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:03:19,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:03:19,704 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:03:19,764 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,769 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,769 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,769 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,769 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,770 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,770 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,770 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,771 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,771 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,771 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,774 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,774 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,776 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,778 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,778 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,778 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,779 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,780 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,781 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,781 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,781 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,781 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,781 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,782 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,782 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,782 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,783 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,783 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,783 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,786 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,786 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,790 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,790 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,790 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,790 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,790 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,793 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,793 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:19,799 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-28 03:03:19,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:03:19,840 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 [2021-12-28 03:03:19,841 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-28 03:03:19,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2021-12-28 03:03:19,915 INFO L129 PetriNetUnfolder]: 7/106 cut-off events. [2021-12-28 03:03:19,916 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-28 03:03:19,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2021-12-28 03:03:19,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2021-12-28 03:03:19,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 208 flow [2021-12-28 03:03:19,955 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-28 03:03:19,955 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-28 03:03:19,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:19,956 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] [2021-12-28 03:03:19,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 851355942, now seen corresponding path program 1 times [2021-12-28 03:03:19,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135556035] [2021-12-28 03:03:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:19,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:20,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:20,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135556035] [2021-12-28 03:03:20,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135556035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:20,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:20,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:03:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159160546] [2021-12-28 03:03:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:20,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 03:03:20,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 03:03:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:03:20,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2021-12-28 03:03:20,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:20,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2021-12-28 03:03:20,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:20,278 INFO L129 PetriNetUnfolder]: 36/184 cut-off events. [2021-12-28 03:03:20,278 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-28 03:03:20,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 184 events. 36/184 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 454 event pairs, 7 based on Foata normal form. 18/184 useless extension candidates. Maximal degree in co-relation 178. Up to 49 conditions per place. [2021-12-28 03:03:20,283 INFO L132 encePairwiseOnDemand]: 106/109 looper letters, 10 selfloop transitions, 0 changer transitions 1/92 dead transitions. [2021-12-28 03:03:20,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 222 flow [2021-12-28 03:03:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 03:03:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-28 03:03:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 203 transitions. [2021-12-28 03:03:20,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9311926605504587 [2021-12-28 03:03:20,294 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 203 transitions. [2021-12-28 03:03:20,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 203 transitions. [2021-12-28 03:03:20,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:20,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 203 transitions. [2021-12-28 03:03:20,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,307 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,309 INFO L186 Difference]: Start difference. First operand has 98 places, 95 transitions, 208 flow. Second operand 2 states and 203 transitions. [2021-12-28 03:03:20,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 222 flow [2021-12-28 03:03:20,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-28 03:03:20,315 INFO L242 Difference]: Finished difference. Result has 93 places, 91 transitions, 188 flow [2021-12-28 03:03:20,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=188, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2021-12-28 03:03:20,319 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, -5 predicate places. [2021-12-28 03:03:20,319 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 188 flow [2021-12-28 03:03:20,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,320 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:20,320 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] [2021-12-28 03:03:20,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:03:20,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash -283457211, now seen corresponding path program 1 times [2021-12-28 03:03:20,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:20,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373763970] [2021-12-28 03:03:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:20,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:20,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:20,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373763970] [2021-12-28 03:03:20,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373763970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:20,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:20,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:03:20,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395178002] [2021-12-28 03:03:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:20,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:20,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:20,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 109 [2021-12-28 03:03:20,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:20,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 109 [2021-12-28 03:03:20,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:20,720 INFO L129 PetriNetUnfolder]: 95/279 cut-off events. [2021-12-28 03:03:20,721 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-28 03:03:20,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 279 events. 95/279 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 965 event pairs, 2 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 445. Up to 71 conditions per place. [2021-12-28 03:03:20,724 INFO L132 encePairwiseOnDemand]: 103/109 looper letters, 33 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2021-12-28 03:03:20,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 300 flow [2021-12-28 03:03:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:03:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 03:03:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2021-12-28 03:03:20,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8042813455657493 [2021-12-28 03:03:20,729 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2021-12-28 03:03:20,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2021-12-28 03:03:20,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:20,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2021-12-28 03:03:20,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,734 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,734 INFO L186 Difference]: Start difference. First operand has 93 places, 91 transitions, 188 flow. Second operand 6 states and 526 transitions. [2021-12-28 03:03:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 300 flow [2021-12-28 03:03:20,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 107 transitions, 300 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:03:20,738 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 213 flow [2021-12-28 03:03:20,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2021-12-28 03:03:20,739 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 1 predicate places. [2021-12-28 03:03:20,739 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 213 flow [2021-12-28 03:03:20,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:20,740 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] [2021-12-28 03:03:20,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:03:20,743 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -337069583, now seen corresponding path program 2 times [2021-12-28 03:03:20,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:20,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62339014] [2021-12-28 03:03:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:20,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:20,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62339014] [2021-12-28 03:03:20,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62339014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:20,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:20,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:03:20,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805349253] [2021-12-28 03:03:20,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:20,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:20,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:20,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 109 [2021-12-28 03:03:20,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:20,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:20,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 109 [2021-12-28 03:03:20,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:21,050 INFO L129 PetriNetUnfolder]: 99/326 cut-off events. [2021-12-28 03:03:21,050 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2021-12-28 03:03:21,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 326 events. 99/326 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1311 event pairs, 20 based on Foata normal form. 3/297 useless extension candidates. Maximal degree in co-relation 546. Up to 71 conditions per place. [2021-12-28 03:03:21,052 INFO L132 encePairwiseOnDemand]: 101/109 looper letters, 36 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2021-12-28 03:03:21,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 341 flow [2021-12-28 03:03:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:03:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:03:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2021-12-28 03:03:21,054 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8020969855832241 [2021-12-28 03:03:21,054 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2021-12-28 03:03:21,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2021-12-28 03:03:21,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:21,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2021-12-28 03:03:21,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,058 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 213 flow. Second operand 7 states and 612 transitions. [2021-12-28 03:03:21,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 341 flow [2021-12-28 03:03:21,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 112 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-28 03:03:21,061 INFO L242 Difference]: Finished difference. Result has 104 places, 95 transitions, 239 flow [2021-12-28 03:03:21,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=104, PETRI_TRANSITIONS=95} [2021-12-28 03:03:21,062 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 6 predicate places. [2021-12-28 03:03:21,063 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 239 flow [2021-12-28 03:03:21,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:21,063 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] [2021-12-28 03:03:21,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:03:21,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1355540335, now seen corresponding path program 3 times [2021-12-28 03:03:21,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:21,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303411497] [2021-12-28 03:03:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:21,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:21,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303411497] [2021-12-28 03:03:21,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303411497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:21,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:21,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:03:21,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955454445] [2021-12-28 03:03:21,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:21,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:03:21,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:03:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:03:21,214 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-28 03:03:21,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 95 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:21,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-28 03:03:21,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:21,371 INFO L129 PetriNetUnfolder]: 224/608 cut-off events. [2021-12-28 03:03:21,371 INFO L130 PetriNetUnfolder]: For 248/248 co-relation queries the response was YES. [2021-12-28 03:03:21,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 608 events. 224/608 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3213 event pairs, 29 based on Foata normal form. 6/557 useless extension candidates. Maximal degree in co-relation 1166. Up to 157 conditions per place. [2021-12-28 03:03:21,375 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 33 selfloop transitions, 7 changer transitions 36/142 dead transitions. [2021-12-28 03:03:21,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 142 transitions, 539 flow [2021-12-28 03:03:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:03:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:03:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 784 transitions. [2021-12-28 03:03:21,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.799184505606524 [2021-12-28 03:03:21,377 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 784 transitions. [2021-12-28 03:03:21,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 784 transitions. [2021-12-28 03:03:21,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:21,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 784 transitions. [2021-12-28 03:03:21,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 87.11111111111111) internal successors, (784), 9 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,383 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,383 INFO L186 Difference]: Start difference. First operand has 104 places, 95 transitions, 239 flow. Second operand 9 states and 784 transitions. [2021-12-28 03:03:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 142 transitions, 539 flow [2021-12-28 03:03:21,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 526 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:03:21,387 INFO L242 Difference]: Finished difference. Result has 113 places, 97 transitions, 281 flow [2021-12-28 03:03:21,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=281, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2021-12-28 03:03:21,387 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 15 predicate places. [2021-12-28 03:03:21,388 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 281 flow [2021-12-28 03:03:21,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:21,388 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] [2021-12-28 03:03:21,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:03:21,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2035553460, now seen corresponding path program 1 times [2021-12-28 03:03:21,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:21,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078147758] [2021-12-28 03:03:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:21,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:21,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078147758] [2021-12-28 03:03:21,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078147758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538467210] [2021-12-28 03:03:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:21,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:21,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:21,497 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) [2021-12-28 03:03:21,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:03:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:21,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:03:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:21,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538467210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:21,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:21,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-28 03:03:21,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621466566] [2021-12-28 03:03:21,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:21,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:21,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:21,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-28 03:03:21,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:21,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-28 03:03:21,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:22,081 INFO L129 PetriNetUnfolder]: 323/827 cut-off events. [2021-12-28 03:03:22,082 INFO L130 PetriNetUnfolder]: For 656/662 co-relation queries the response was YES. [2021-12-28 03:03:22,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1895 conditions, 827 events. 323/827 cut-off events. For 656/662 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4805 event pairs, 17 based on Foata normal form. 6/753 useless extension candidates. Maximal degree in co-relation 1882. Up to 179 conditions per place. [2021-12-28 03:03:22,103 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 55 selfloop transitions, 18 changer transitions 6/148 dead transitions. [2021-12-28 03:03:22,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 678 flow [2021-12-28 03:03:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:03:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:03:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2021-12-28 03:03:22,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854521625163827 [2021-12-28 03:03:22,105 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2021-12-28 03:03:22,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2021-12-28 03:03:22,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:22,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2021-12-28 03:03:22,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,109 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,109 INFO L186 Difference]: Start difference. First operand has 113 places, 97 transitions, 281 flow. Second operand 7 states and 652 transitions. [2021-12-28 03:03:22,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 678 flow [2021-12-28 03:03:22,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 650 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-28 03:03:22,114 INFO L242 Difference]: Finished difference. Result has 116 places, 110 transitions, 420 flow [2021-12-28 03:03:22,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=116, PETRI_TRANSITIONS=110} [2021-12-28 03:03:22,115 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 18 predicate places. [2021-12-28 03:03:22,115 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 110 transitions, 420 flow [2021-12-28 03:03:22,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:22,116 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] [2021-12-28 03:03:22,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:22,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:22,332 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 60102788, now seen corresponding path program 2 times [2021-12-28 03:03:22,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:22,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283768893] [2021-12-28 03:03:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:22,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:22,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:22,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283768893] [2021-12-28 03:03:22,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283768893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:22,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:22,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:03:22,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528207611] [2021-12-28 03:03:22,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:22,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:03:22,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:22,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:03:22,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:03:22,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-28 03:03:22,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 110 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:22,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-28 03:03:22,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:22,515 INFO L129 PetriNetUnfolder]: 174/629 cut-off events. [2021-12-28 03:03:22,516 INFO L130 PetriNetUnfolder]: For 889/916 co-relation queries the response was YES. [2021-12-28 03:03:22,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 629 events. 174/629 cut-off events. For 889/916 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3518 event pairs, 21 based on Foata normal form. 28/583 useless extension candidates. Maximal degree in co-relation 1451. Up to 107 conditions per place. [2021-12-28 03:03:22,520 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 21 selfloop transitions, 6 changer transitions 0/119 dead transitions. [2021-12-28 03:03:22,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 505 flow [2021-12-28 03:03:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:03:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:03:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 465 transitions. [2021-12-28 03:03:22,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8532110091743119 [2021-12-28 03:03:22,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 465 transitions. [2021-12-28 03:03:22,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 465 transitions. [2021-12-28 03:03:22,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:22,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 465 transitions. [2021-12-28 03:03:22,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,525 INFO L186 Difference]: Start difference. First operand has 116 places, 110 transitions, 420 flow. Second operand 5 states and 465 transitions. [2021-12-28 03:03:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 505 flow [2021-12-28 03:03:22,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-28 03:03:22,531 INFO L242 Difference]: Finished difference. Result has 120 places, 111 transitions, 440 flow [2021-12-28 03:03:22,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2021-12-28 03:03:22,534 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 22 predicate places. [2021-12-28 03:03:22,534 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 440 flow [2021-12-28 03:03:22,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:22,535 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] [2021-12-28 03:03:22,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:03:22,535 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1754557135, now seen corresponding path program 1 times [2021-12-28 03:03:22,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:22,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608163278] [2021-12-28 03:03:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:22,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:22,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:22,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608163278] [2021-12-28 03:03:22,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608163278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:22,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860402593] [2021-12-28 03:03:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:22,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:22,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:22,624 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) [2021-12-28 03:03:22,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:03:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:03:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:22,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:22,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860402593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:22,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:22,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-28 03:03:22,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351368350] [2021-12-28 03:03:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:22,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:22,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:22,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-28 03:03:22,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 440 flow. Second operand has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:22,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:22,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-28 03:03:22,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:23,053 INFO L129 PetriNetUnfolder]: 402/1166 cut-off events. [2021-12-28 03:03:23,053 INFO L130 PetriNetUnfolder]: For 2293/2329 co-relation queries the response was YES. [2021-12-28 03:03:23,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 1166 events. 402/1166 cut-off events. For 2293/2329 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7554 event pairs, 41 based on Foata normal form. 45/1115 useless extension candidates. Maximal degree in co-relation 3302. Up to 313 conditions per place. [2021-12-28 03:03:23,060 INFO L132 encePairwiseOnDemand]: 104/109 looper letters, 68 selfloop transitions, 19 changer transitions 5/165 dead transitions. [2021-12-28 03:03:23,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 165 transitions, 993 flow [2021-12-28 03:03:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:03:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 03:03:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 566 transitions. [2021-12-28 03:03:23,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8654434250764526 [2021-12-28 03:03:23,063 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 566 transitions. [2021-12-28 03:03:23,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 566 transitions. [2021-12-28 03:03:23,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:23,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 566 transitions. [2021-12-28 03:03:23,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,066 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,066 INFO L186 Difference]: Start difference. First operand has 120 places, 111 transitions, 440 flow. Second operand 6 states and 566 transitions. [2021-12-28 03:03:23,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 165 transitions, 993 flow [2021-12-28 03:03:23,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 165 transitions, 982 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-28 03:03:23,072 INFO L242 Difference]: Finished difference. Result has 126 places, 124 transitions, 635 flow [2021-12-28 03:03:23,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=126, PETRI_TRANSITIONS=124} [2021-12-28 03:03:23,073 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 28 predicate places. [2021-12-28 03:03:23,073 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 635 flow [2021-12-28 03:03:23,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:23,073 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] [2021-12-28 03:03:23,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:23,290 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,SelfDestructingSolverStorable6 [2021-12-28 03:03:23,290 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1404627543, now seen corresponding path program 2 times [2021-12-28 03:03:23,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:23,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587427902] [2021-12-28 03:03:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:23,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:23,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:23,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587427902] [2021-12-28 03:03:23,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587427902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:23,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:23,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:03:23,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287051861] [2021-12-28 03:03:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:23,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:03:23,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:03:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:03:23,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-28 03:03:23,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 635 flow. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:23,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-28 03:03:23,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:23,481 INFO L129 PetriNetUnfolder]: 225/981 cut-off events. [2021-12-28 03:03:23,481 INFO L130 PetriNetUnfolder]: For 2345/2403 co-relation queries the response was YES. [2021-12-28 03:03:23,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2637 conditions, 981 events. 225/981 cut-off events. For 2345/2403 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6826 event pairs, 31 based on Foata normal form. 52/927 useless extension candidates. Maximal degree in co-relation 2617. Up to 171 conditions per place. [2021-12-28 03:03:23,489 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 22 selfloop transitions, 6 changer transitions 0/133 dead transitions. [2021-12-28 03:03:23,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 133 transitions, 729 flow [2021-12-28 03:03:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:03:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:03:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 464 transitions. [2021-12-28 03:03:23,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8513761467889909 [2021-12-28 03:03:23,491 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 464 transitions. [2021-12-28 03:03:23,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 464 transitions. [2021-12-28 03:03:23,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:23,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 464 transitions. [2021-12-28 03:03:23,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,495 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,495 INFO L186 Difference]: Start difference. First operand has 126 places, 124 transitions, 635 flow. Second operand 5 states and 464 transitions. [2021-12-28 03:03:23,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 133 transitions, 729 flow [2021-12-28 03:03:23,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 133 transitions, 729 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:03:23,502 INFO L242 Difference]: Finished difference. Result has 131 places, 125 transitions, 659 flow [2021-12-28 03:03:23,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=659, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2021-12-28 03:03:23,505 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 33 predicate places. [2021-12-28 03:03:23,505 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 659 flow [2021-12-28 03:03:23,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:23,505 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:23,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:03:23,506 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash -458505152, now seen corresponding path program 1 times [2021-12-28 03:03:23,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:23,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124311894] [2021-12-28 03:03:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:23,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:23,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124311894] [2021-12-28 03:03:23,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124311894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224532478] [2021-12-28 03:03:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:23,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:23,604 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) [2021-12-28 03:03:23,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:03:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:03:23,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:23,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:23,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224532478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:23,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:23,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2021-12-28 03:03:23,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986314378] [2021-12-28 03:03:23,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:23,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 03:03:23,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 03:03:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:03:23,962 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-28 03:03:23,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 659 flow. Second operand has 14 states, 14 states have (on average 81.78571428571429) internal successors, (1145), 14 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:23,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:23,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-28 03:03:23,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:24,590 INFO L129 PetriNetUnfolder]: 917/2722 cut-off events. [2021-12-28 03:03:24,590 INFO L130 PetriNetUnfolder]: For 9707/9931 co-relation queries the response was YES. [2021-12-28 03:03:24,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 2722 events. 917/2722 cut-off events. For 9707/9931 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23012 event pairs, 44 based on Foata normal form. 120/2619 useless extension candidates. Maximal degree in co-relation 9060. Up to 348 conditions per place. [2021-12-28 03:03:24,609 INFO L132 encePairwiseOnDemand]: 95/109 looper letters, 88 selfloop transitions, 39 changer transitions 102/306 dead transitions. [2021-12-28 03:03:24,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 306 transitions, 2660 flow [2021-12-28 03:03:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 03:03:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-28 03:03:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1793 transitions. [2021-12-28 03:03:24,630 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7833114897335081 [2021-12-28 03:03:24,630 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1793 transitions. [2021-12-28 03:03:24,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1793 transitions. [2021-12-28 03:03:24,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:24,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1793 transitions. [2021-12-28 03:03:24,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:24,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 109.0) internal successors, (2398), 22 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:24,638 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 109.0) internal successors, (2398), 22 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:24,638 INFO L186 Difference]: Start difference. First operand has 131 places, 125 transitions, 659 flow. Second operand 21 states and 1793 transitions. [2021-12-28 03:03:24,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 306 transitions, 2660 flow [2021-12-28 03:03:24,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 306 transitions, 2637 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-28 03:03:24,653 INFO L242 Difference]: Finished difference. Result has 161 places, 152 transitions, 1077 flow [2021-12-28 03:03:24,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1077, PETRI_PLACES=161, PETRI_TRANSITIONS=152} [2021-12-28 03:03:24,654 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 63 predicate places. [2021-12-28 03:03:24,654 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 152 transitions, 1077 flow [2021-12-28 03:03:24,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.78571428571429) internal successors, (1145), 14 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:24,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:24,655 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:24,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:24,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:24,867 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash 118312707, now seen corresponding path program 2 times [2021-12-28 03:03:24,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:24,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50665929] [2021-12-28 03:03:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:24,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:24,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50665929] [2021-12-28 03:03:24,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50665929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56605202] [2021-12-28 03:03:24,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:03:24,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:24,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:24,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:03:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:03:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:03:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:03:25,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:03:25,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56605202] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:25,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:03:25,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2021-12-28 03:03:25,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351184066] [2021-12-28 03:03:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:03:25,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:03:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:03:25,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-28 03:03:25,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 152 transitions, 1077 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:25,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:25,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-28 03:03:25,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:25,697 INFO L129 PetriNetUnfolder]: 1210/3137 cut-off events. [2021-12-28 03:03:25,697 INFO L130 PetriNetUnfolder]: For 19031/19143 co-relation queries the response was YES. [2021-12-28 03:03:25,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12947 conditions, 3137 events. 1210/3137 cut-off events. For 19031/19143 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25830 event pairs, 15 based on Foata normal form. 36/2949 useless extension candidates. Maximal degree in co-relation 12912. Up to 992 conditions per place. [2021-12-28 03:03:25,726 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 123 selfloop transitions, 64 changer transitions 0/256 dead transitions. [2021-12-28 03:03:25,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 256 transitions, 2606 flow [2021-12-28 03:03:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:03:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:03:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2021-12-28 03:03:25,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854521625163827 [2021-12-28 03:03:25,728 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2021-12-28 03:03:25,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2021-12-28 03:03:25,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:25,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2021-12-28 03:03:25,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:25,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:25,731 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:25,731 INFO L186 Difference]: Start difference. First operand has 161 places, 152 transitions, 1077 flow. Second operand 7 states and 652 transitions. [2021-12-28 03:03:25,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 256 transitions, 2606 flow [2021-12-28 03:03:25,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 256 transitions, 2398 flow, removed 101 selfloop flow, removed 8 redundant places. [2021-12-28 03:03:25,771 INFO L242 Difference]: Finished difference. Result has 156 places, 197 transitions, 1854 flow [2021-12-28 03:03:25,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1854, PETRI_PLACES=156, PETRI_TRANSITIONS=197} [2021-12-28 03:03:25,772 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 58 predicate places. [2021-12-28 03:03:25,772 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 197 transitions, 1854 flow [2021-12-28 03:03:25,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:25,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:25,772 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:25,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:25,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:25,987 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -170804443, now seen corresponding path program 3 times [2021-12-28 03:03:25,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:25,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001128088] [2021-12-28 03:03:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:25,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:26,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:26,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001128088] [2021-12-28 03:03:26,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001128088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:26,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813347523] [2021-12-28 03:03:26,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:03:26,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:26,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:26,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:26,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:03:26,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 03:03:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:03:26,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:26,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:26,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813347523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:26,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:26,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 18 [2021-12-28 03:03:26,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126360836] [2021-12-28 03:03:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:26,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 03:03:26,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 03:03:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:03:26,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-28 03:03:26,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 197 transitions, 1854 flow. Second operand has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:26,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:26,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-28 03:03:26,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:28,507 INFO L129 PetriNetUnfolder]: 3274/9092 cut-off events. [2021-12-28 03:03:28,507 INFO L130 PetriNetUnfolder]: For 62835/63422 co-relation queries the response was YES. [2021-12-28 03:03:28,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39699 conditions, 9092 events. 3274/9092 cut-off events. For 62835/63422 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 94556 event pairs, 68 based on Foata normal form. 259/8589 useless extension candidates. Maximal degree in co-relation 39663. Up to 1467 conditions per place. [2021-12-28 03:03:28,619 INFO L132 encePairwiseOnDemand]: 94/109 looper letters, 276 selfloop transitions, 260 changer transitions 167/800 dead transitions. [2021-12-28 03:03:28,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 800 transitions, 11420 flow [2021-12-28 03:03:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-28 03:03:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-28 03:03:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3636 transitions. [2021-12-28 03:03:28,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7757627480264562 [2021-12-28 03:03:28,627 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3636 transitions. [2021-12-28 03:03:28,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3636 transitions. [2021-12-28 03:03:28,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:28,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3636 transitions. [2021-12-28 03:03:28,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 84.55813953488372) internal successors, (3636), 43 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:28,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 109.0) internal successors, (4796), 44 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:28,642 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 109.0) internal successors, (4796), 44 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:28,642 INFO L186 Difference]: Start difference. First operand has 156 places, 197 transitions, 1854 flow. Second operand 43 states and 3636 transitions. [2021-12-28 03:03:28,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 800 transitions, 11420 flow [2021-12-28 03:03:28,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 800 transitions, 11308 flow, removed 56 selfloop flow, removed 0 redundant places. [2021-12-28 03:03:28,830 INFO L242 Difference]: Finished difference. Result has 216 places, 415 transitions, 5077 flow [2021-12-28 03:03:28,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5077, PETRI_PLACES=216, PETRI_TRANSITIONS=415} [2021-12-28 03:03:28,831 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 118 predicate places. [2021-12-28 03:03:28,831 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 415 transitions, 5077 flow [2021-12-28 03:03:28,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:28,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:28,832 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:28,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 03:03:29,048 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 840797718, now seen corresponding path program 1 times [2021-12-28 03:03:29,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:29,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864881376] [2021-12-28 03:03:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:29,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:29,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864881376] [2021-12-28 03:03:29,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864881376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136062360] [2021-12-28 03:03:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:29,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:29,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:29,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:03:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:29,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:29,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136062360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:29,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:29,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2021-12-28 03:03:29,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796566014] [2021-12-28 03:03:29,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:29,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 03:03:29,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 03:03:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:03:29,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-28 03:03:29,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 415 transitions, 5077 flow. Second operand has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:29,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:29,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-28 03:03:29,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:32,915 INFO L129 PetriNetUnfolder]: 7439/18749 cut-off events. [2021-12-28 03:03:32,915 INFO L130 PetriNetUnfolder]: For 236377/237291 co-relation queries the response was YES. [2021-12-28 03:03:33,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97347 conditions, 18749 events. 7439/18749 cut-off events. For 236377/237291 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 205111 event pairs, 379 based on Foata normal form. 306/17398 useless extension candidates. Maximal degree in co-relation 97292. Up to 3087 conditions per place. [2021-12-28 03:03:33,166 INFO L132 encePairwiseOnDemand]: 95/109 looper letters, 646 selfloop transitions, 152 changer transitions 146/1075 dead transitions. [2021-12-28 03:03:33,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1075 transitions, 15928 flow [2021-12-28 03:03:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 03:03:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-28 03:03:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1621 transitions. [2021-12-28 03:03:33,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7827136648961854 [2021-12-28 03:03:33,169 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1621 transitions. [2021-12-28 03:03:33,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1621 transitions. [2021-12-28 03:03:33,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:33,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1621 transitions. [2021-12-28 03:03:33,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.3157894736842) internal successors, (1621), 19 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:33,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 109.0) internal successors, (2180), 20 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:33,177 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 109.0) internal successors, (2180), 20 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:33,177 INFO L186 Difference]: Start difference. First operand has 216 places, 415 transitions, 5077 flow. Second operand 19 states and 1621 transitions. [2021-12-28 03:03:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1075 transitions, 15928 flow [2021-12-28 03:03:33,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1075 transitions, 15114 flow, removed 395 selfloop flow, removed 11 redundant places. [2021-12-28 03:03:33,888 INFO L242 Difference]: Finished difference. Result has 224 places, 512 transitions, 6785 flow [2021-12-28 03:03:33,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6785, PETRI_PLACES=224, PETRI_TRANSITIONS=512} [2021-12-28 03:03:33,889 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 126 predicate places. [2021-12-28 03:03:33,889 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 512 transitions, 6785 flow [2021-12-28 03:03:33,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:33,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:33,890 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:33,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:34,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:34,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1333707901, now seen corresponding path program 1 times [2021-12-28 03:03:34,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:34,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203538565] [2021-12-28 03:03:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:34,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:34,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203538565] [2021-12-28 03:03:34,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203538565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403755704] [2021-12-28 03:03:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:34,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:34,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:34,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:03:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 03:03:34,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:34,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:34,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403755704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:34,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:34,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 15 [2021-12-28 03:03:34,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858808556] [2021-12-28 03:03:34,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 03:03:34,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 03:03:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:03:34,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-28 03:03:34,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 512 transitions, 6785 flow. Second operand has 15 states, 15 states have (on average 81.93333333333334) internal successors, (1229), 15 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:34,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:34,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-28 03:03:34,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:39,620 INFO L129 PetriNetUnfolder]: 10922/27413 cut-off events. [2021-12-28 03:03:39,621 INFO L130 PetriNetUnfolder]: For 419336/421644 co-relation queries the response was YES. [2021-12-28 03:03:39,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146776 conditions, 27413 events. 10922/27413 cut-off events. For 419336/421644 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 316758 event pairs, 228 based on Foata normal form. 460/25853 useless extension candidates. Maximal degree in co-relation 146718. Up to 4399 conditions per place. [2021-12-28 03:03:39,930 INFO L132 encePairwiseOnDemand]: 96/109 looper letters, 271 selfloop transitions, 576 changer transitions 383/1363 dead transitions. [2021-12-28 03:03:39,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1363 transitions, 22233 flow [2021-12-28 03:03:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 03:03:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-28 03:03:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2236 transitions. [2021-12-28 03:03:39,932 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7889908256880734 [2021-12-28 03:03:39,932 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2236 transitions. [2021-12-28 03:03:39,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2236 transitions. [2021-12-28 03:03:39,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:39,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2236 transitions. [2021-12-28 03:03:40,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.0) internal successors, (2236), 26 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:40,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 109.0) internal successors, (2943), 27 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:40,046 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 109.0) internal successors, (2943), 27 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:40,046 INFO L186 Difference]: Start difference. First operand has 224 places, 512 transitions, 6785 flow. Second operand 26 states and 2236 transitions. [2021-12-28 03:03:40,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1363 transitions, 22233 flow [2021-12-28 03:03:41,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1363 transitions, 21310 flow, removed 385 selfloop flow, removed 16 redundant places. [2021-12-28 03:03:41,219 INFO L242 Difference]: Finished difference. Result has 245 places, 871 transitions, 14527 flow [2021-12-28 03:03:41,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14527, PETRI_PLACES=245, PETRI_TRANSITIONS=871} [2021-12-28 03:03:41,219 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 147 predicate places. [2021-12-28 03:03:41,219 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 871 transitions, 14527 flow [2021-12-28 03:03:41,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.93333333333334) internal successors, (1229), 15 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:41,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:41,221 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:41,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:41,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:41,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 809566608, now seen corresponding path program 4 times [2021-12-28 03:03:41,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30858611] [2021-12-28 03:03:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:41,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-28 03:03:41,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30858611] [2021-12-28 03:03:41,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30858611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:41,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:41,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:03:41,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376301898] [2021-12-28 03:03:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:41,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:03:41,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:03:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:03:41,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-28 03:03:41,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 871 transitions, 14527 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:41,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:41,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-28 03:03:41,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:48,637 INFO L129 PetriNetUnfolder]: 13343/31723 cut-off events. [2021-12-28 03:03:48,638 INFO L130 PetriNetUnfolder]: For 591077/594041 co-relation queries the response was YES. [2021-12-28 03:03:48,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193876 conditions, 31723 events. 13343/31723 cut-off events. For 591077/594041 co-relation queries the response was YES. Maximal size of possible extension queue 1799. Compared 369559 event pairs, 191 based on Foata normal form. 822/30235 useless extension candidates. Maximal degree in co-relation 193810. Up to 13195 conditions per place. [2021-12-28 03:03:49,094 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 1044 selfloop transitions, 66 changer transitions 244/1423 dead transitions. [2021-12-28 03:03:49,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1423 transitions, 26956 flow [2021-12-28 03:03:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:03:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:03:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2021-12-28 03:03:49,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8807339449541285 [2021-12-28 03:03:49,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 480 transitions. [2021-12-28 03:03:49,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 480 transitions. [2021-12-28 03:03:49,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:49,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 480 transitions. [2021-12-28 03:03:49,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:49,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:49,098 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:49,098 INFO L186 Difference]: Start difference. First operand has 245 places, 871 transitions, 14527 flow. Second operand 5 states and 480 transitions. [2021-12-28 03:03:49,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1423 transitions, 26956 flow [2021-12-28 03:03:54,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1423 transitions, 25066 flow, removed 942 selfloop flow, removed 4 redundant places. [2021-12-28 03:03:54,253 INFO L242 Difference]: Finished difference. Result has 245 places, 765 transitions, 11276 flow [2021-12-28 03:03:54,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=13357, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11276, PETRI_PLACES=245, PETRI_TRANSITIONS=765} [2021-12-28 03:03:54,255 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 147 predicate places. [2021-12-28 03:03:54,255 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 765 transitions, 11276 flow [2021-12-28 03:03:54,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:54,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:54,255 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:54,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 03:03:54,256 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:03:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2129325404, now seen corresponding path program 5 times [2021-12-28 03:03:54,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:54,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033601709] [2021-12-28 03:03:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:54,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:03:54,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033601709] [2021-12-28 03:03:54,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033601709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:54,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413804183] [2021-12-28 03:03:54,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:03:54,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:54,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:54,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:03:54,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-28 03:03:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:54,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 03:03:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 03:03:54,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:03:54,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413804183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:54,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:54,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10 [2021-12-28 03:03:54,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982273349] [2021-12-28 03:03:54,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:54,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:03:54,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:03:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:03:54,720 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-28 03:03:54,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 765 transitions, 11276 flow. Second operand has 10 states, 10 states have (on average 90.5) internal successors, (905), 10 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:54,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:54,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-28 03:03:54,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:04:02,773 INFO L129 PetriNetUnfolder]: 14535/41385 cut-off events. [2021-12-28 03:04:02,774 INFO L130 PetriNetUnfolder]: For 543274/544938 co-relation queries the response was YES. [2021-12-28 03:04:03,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224887 conditions, 41385 events. 14535/41385 cut-off events. For 543274/544938 co-relation queries the response was YES. Maximal size of possible extension queue 1919. Compared 527939 event pairs, 546 based on Foata normal form. 1101/38592 useless extension candidates. Maximal degree in co-relation 224818. Up to 8598 conditions per place. [2021-12-28 03:04:03,657 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 539 selfloop transitions, 217 changer transitions 0/1091 dead transitions. [2021-12-28 03:04:03,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1091 transitions, 18334 flow [2021-12-28 03:04:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:04:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 03:04:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 752 transitions. [2021-12-28 03:04:03,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8623853211009175 [2021-12-28 03:04:03,659 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 752 transitions. [2021-12-28 03:04:03,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 752 transitions. [2021-12-28 03:04:03,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:04:03,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 752 transitions. [2021-12-28 03:04:03,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.0) internal successors, (752), 8 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:04:03,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 109.0) internal successors, (981), 9 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:04:03,662 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 109.0) internal successors, (981), 9 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:04:03,662 INFO L186 Difference]: Start difference. First operand has 245 places, 765 transitions, 11276 flow. Second operand 8 states and 752 transitions. [2021-12-28 03:04:03,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1091 transitions, 18334 flow [2021-12-28 03:04:07,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1091 transitions, 17793 flow, removed 234 selfloop flow, removed 9 redundant places. [2021-12-28 03:04:07,882 INFO L242 Difference]: Finished difference. Result has 235 places, 831 transitions, 13009 flow [2021-12-28 03:04:07,883 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=10098, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13009, PETRI_PLACES=235, PETRI_TRANSITIONS=831} [2021-12-28 03:04:07,883 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 137 predicate places. [2021-12-28 03:04:07,883 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 831 transitions, 13009 flow [2021-12-28 03:04:07,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.5) internal successors, (905), 10 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:04:07,884 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:04:07,884 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:04:07,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:04:08,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:04:08,085 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 03:04:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:04:08,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1286772282, now seen corresponding path program 6 times [2021-12-28 03:04:08,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:04:08,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056167853] [2021-12-28 03:04:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:04:08,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:04:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:04:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:04:08,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:04:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056167853] [2021-12-28 03:04:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056167853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:04:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638983114] [2021-12-28 03:04:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:04:08,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:04:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:04:08,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:04:08,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:04:08,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-28 03:04:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:04:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 03:04:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:04:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:04:08,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:04:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:04:08,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638983114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:04:08,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:04:08,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2021-12-28 03:04:08,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734077268] [2021-12-28 03:04:08,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:04:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 03:04:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:04:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 03:04:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:04:08,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-28 03:04:08,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 831 transitions, 13009 flow. Second operand has 16 states, 16 states have (on average 80.25) internal successors, (1284), 16 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:04:08,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:04:08,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-28 03:04:08,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand