./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:51:17,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:51:17,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:51:17,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:51:17,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:51:17,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:51:17,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:51:17,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:51:17,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:51:17,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:51:17,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:51:17,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:51:17,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:51:17,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:51:17,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:51:17,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:51:17,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:51:17,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:51:17,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:51:17,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:51:17,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:51:17,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:51:17,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:51:17,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:51:17,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:51:17,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:51:17,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:51:17,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:51:17,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:51:17,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:51:17,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:51:17,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:51:17,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:51:17,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:51:17,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:51:17,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:51:17,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:51:17,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:51:17,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:51:17,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:51:17,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:51:17,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:51:18,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:51:18,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:51:18,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:51:18,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:51:18,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:51:18,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:51:18,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:51:18,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:51:18,012 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:51:18,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:51:18,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:51:18,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:51:18,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:51:18,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:51:18,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:51:18,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:51:18,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:51:18,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:51:18,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:51:18,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:51:18,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:51:18,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:51:18,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:51:18,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:51:18,015 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:51:18,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:51:18,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:51:18,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:51:18,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2021-12-14 16:51:18,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:51:18,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:51:18,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:51:18,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:51:18,252 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:51:18,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-12-14 16:51:18,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc45700ff/dfe340f213304de18e052738c87a548c/FLAG7aca33552 [2021-12-14 16:51:18,681 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:51:18,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-12-14 16:51:18,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc45700ff/dfe340f213304de18e052738c87a548c/FLAG7aca33552 [2021-12-14 16:51:18,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc45700ff/dfe340f213304de18e052738c87a548c [2021-12-14 16:51:18,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:51:18,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:51:18,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:51:18,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:51:18,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:51:18,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:18,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e7f5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18, skipping insertion in model container [2021-12-14 16:51:18,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:18,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:51:18,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:51:18,910 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-12-14 16:51:18,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:51:18,927 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:51:18,945 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-12-14 16:51:18,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:51:18,956 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:51:18,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18 WrapperNode [2021-12-14 16:51:18,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:51:18,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:51:18,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:51:18,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:51:18,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:18,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:18,997 INFO L137 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2021-12-14 16:51:18,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:51:18,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:51:18,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:51:18,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:51:19,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:51:19,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:51:19,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:51:19,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:51:19,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (1/1) ... [2021-12-14 16:51:19,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:51:19,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:19,048 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) [2021-12-14 16:51:19,051 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 [2021-12-14 16:51:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:51:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:51:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:51:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:51:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:51:19,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:51:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:51:19,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:51:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-14 16:51:19,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-14 16:51:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:51:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:51:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:51:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 16:51:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:51:19,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:51:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:51:19,076 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:51:19,145 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:51:19,146 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:51:19,493 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:51:19,614 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:51:19,615 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-14 16:51:19,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:51:19 BoogieIcfgContainer [2021-12-14 16:51:19,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:51:19,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:51:19,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:51:19,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:51:19,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:51:18" (1/3) ... [2021-12-14 16:51:19,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1094b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:51:19, skipping insertion in model container [2021-12-14 16:51:19,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:18" (2/3) ... [2021-12-14 16:51:19,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1094b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:51:19, skipping insertion in model container [2021-12-14 16:51:19,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:51:19" (3/3) ... [2021-12-14 16:51:19,626 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2021-12-14 16:51:19,634 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:51:19,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:51:19,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:51:19,635 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:51:19,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,712 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,712 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,719 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,719 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,719 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,721 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,721 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,721 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,727 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,736 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,737 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,742 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,745 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,745 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,745 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,749 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,749 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,749 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,749 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,749 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,749 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,750 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,750 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,750 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,750 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,750 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,752 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,753 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,753 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,753 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,753 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:19,755 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-14 16:51:19,792 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:51:19,799 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 [2021-12-14 16:51:19,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-14 16:51:19,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2021-12-14 16:51:19,909 INFO L129 PetriNetUnfolder]: 22/264 cut-off events. [2021-12-14 16:51:19,910 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-14 16:51:19,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2021-12-14 16:51:19,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2021-12-14 16:51:19,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2021-12-14 16:51:19,962 INFO L129 PetriNetUnfolder]: 22/252 cut-off events. [2021-12-14 16:51:19,962 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-14 16:51:19,962 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:19,963 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:19,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash 956219309, now seen corresponding path program 1 times [2021-12-14 16:51:19,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989773154] [2021-12-14 16:51:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:19,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:20,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:20,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989773154] [2021-12-14 16:51:20,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989773154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:20,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:20,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:51:20,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022664404] [2021-12-14 16:51:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:20,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:51:20,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:51:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:51:20,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2021-12-14 16:51:20,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:20,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2021-12-14 16:51:20,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:20,397 INFO L129 PetriNetUnfolder]: 137/624 cut-off events. [2021-12-14 16:51:20,397 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-12-14 16:51:20,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2446 event pairs, 74 based on Foata normal form. 97/655 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2021-12-14 16:51:20,404 INFO L132 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2021-12-14 16:51:20,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2021-12-14 16:51:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:51:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:51:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2021-12-14 16:51:20,420 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2021-12-14 16:51:20,421 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2021-12-14 16:51:20,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2021-12-14 16:51:20,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:20,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2021-12-14 16:51:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,436 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,438 INFO L186 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2021-12-14 16:51:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2021-12-14 16:51:20,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-14 16:51:20,447 INFO L242 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2021-12-14 16:51:20,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2021-12-14 16:51:20,452 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2021-12-14 16:51:20,452 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2021-12-14 16:51:20,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:20,453 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:20,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:51:20,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:20,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1907627099, now seen corresponding path program 1 times [2021-12-14 16:51:20,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955624370] [2021-12-14 16:51:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:20,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:20,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955624370] [2021-12-14 16:51:20,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955624370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:20,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:20,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:51:20,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270381008] [2021-12-14 16:51:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:20,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:51:20,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:51:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:51:20,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2021-12-14 16:51:20,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:20,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2021-12-14 16:51:20,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:20,809 INFO L129 PetriNetUnfolder]: 125/535 cut-off events. [2021-12-14 16:51:20,809 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-12-14 16:51:20,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1784 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 745. Up to 142 conditions per place. [2021-12-14 16:51:20,814 INFO L132 encePairwiseOnDemand]: 264/267 looper letters, 22 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2021-12-14 16:51:20,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 528 flow [2021-12-14 16:51:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:51:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:51:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2021-12-14 16:51:20,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038701622971286 [2021-12-14 16:51:20,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2021-12-14 16:51:20,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2021-12-14 16:51:20,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:20,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2021-12-14 16:51:20,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,823 INFO L186 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 724 transitions. [2021-12-14 16:51:20,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 528 flow [2021-12-14 16:51:20,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:51:20,831 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 476 flow [2021-12-14 16:51:20,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2021-12-14 16:51:20,832 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2021-12-14 16:51:20,832 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 476 flow [2021-12-14 16:51:20,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:20,833 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:20,833 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:20,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:51:20,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash -104740663, now seen corresponding path program 2 times [2021-12-14 16:51:20,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:20,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976277461] [2021-12-14 16:51:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:20,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:21,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976277461] [2021-12-14 16:51:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976277461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:21,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:21,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:51:21,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799720536] [2021-12-14 16:51:21,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:21,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:51:21,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:21,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:51:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:51:21,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-14 16:51:21,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:21,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-14 16:51:21,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:21,249 INFO L129 PetriNetUnfolder]: 127/663 cut-off events. [2021-12-14 16:51:21,249 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-12-14 16:51:21,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 663 events. 127/663 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2130 event pairs, 67 based on Foata normal form. 8/630 useless extension candidates. Maximal degree in co-relation 1003. Up to 210 conditions per place. [2021-12-14 16:51:21,253 INFO L132 encePairwiseOnDemand]: 255/267 looper letters, 48 selfloop transitions, 8 changer transitions 28/262 dead transitions. [2021-12-14 16:51:21,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 262 transitions, 711 flow [2021-12-14 16:51:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:51:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:51:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1877 transitions. [2021-12-14 16:51:21,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811069496462755 [2021-12-14 16:51:21,257 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1877 transitions. [2021-12-14 16:51:21,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1877 transitions. [2021-12-14 16:51:21,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:21,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1877 transitions. [2021-12-14 16:51:21,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.55555555555554) internal successors, (1877), 9 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,265 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 476 flow. Second operand 9 states and 1877 transitions. [2021-12-14 16:51:21,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 262 transitions, 711 flow [2021-12-14 16:51:21,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 262 transitions, 709 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:51:21,269 INFO L242 Difference]: Finished difference. Result has 240 places, 231 transitions, 506 flow [2021-12-14 16:51:21,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=506, PETRI_PLACES=240, PETRI_TRANSITIONS=231} [2021-12-14 16:51:21,270 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2021-12-14 16:51:21,270 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 231 transitions, 506 flow [2021-12-14 16:51:21,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:21,271 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:21,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:51:21,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1211723757, now seen corresponding path program 1 times [2021-12-14 16:51:21,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:21,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363104785] [2021-12-14 16:51:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:21,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:51:21,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363104785] [2021-12-14 16:51:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363104785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:21,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:51:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696443198] [2021-12-14 16:51:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:51:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:51:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:51:21,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2021-12-14 16:51:21,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 231 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:21,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2021-12-14 16:51:21,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:21,498 INFO L129 PetriNetUnfolder]: 245/864 cut-off events. [2021-12-14 16:51:21,499 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2021-12-14 16:51:21,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 864 events. 245/864 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4061 event pairs, 84 based on Foata normal form. 1/814 useless extension candidates. Maximal degree in co-relation 1566. Up to 226 conditions per place. [2021-12-14 16:51:21,504 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/248 dead transitions. [2021-12-14 16:51:21,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 248 transitions, 689 flow [2021-12-14 16:51:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:51:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:51:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2021-12-14 16:51:21,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2021-12-14 16:51:21,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2021-12-14 16:51:21,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2021-12-14 16:51:21,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:21,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2021-12-14 16:51:21,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,511 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,511 INFO L186 Difference]: Start difference. First operand has 240 places, 231 transitions, 506 flow. Second operand 5 states and 1035 transitions. [2021-12-14 16:51:21,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 248 transitions, 689 flow [2021-12-14 16:51:21,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 248 transitions, 675 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-14 16:51:21,515 INFO L242 Difference]: Finished difference. Result has 240 places, 232 transitions, 508 flow [2021-12-14 16:51:21,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=508, PETRI_PLACES=240, PETRI_TRANSITIONS=232} [2021-12-14 16:51:21,516 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2021-12-14 16:51:21,516 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 232 transitions, 508 flow [2021-12-14 16:51:21,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:21,517 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:21,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:51:21,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 856851245, now seen corresponding path program 1 times [2021-12-14 16:51:21,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:21,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776389487] [2021-12-14 16:51:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:21,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:51:21,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776389487] [2021-12-14 16:51:21,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776389487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:21,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:21,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:51:21,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720004304] [2021-12-14 16:51:21,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:21,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:51:21,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:51:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:51:21,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2021-12-14 16:51:21,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 232 transitions, 508 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:21,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2021-12-14 16:51:21,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:21,701 INFO L129 PetriNetUnfolder]: 138/574 cut-off events. [2021-12-14 16:51:21,701 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-12-14 16:51:21,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 574 events. 138/574 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1964 event pairs, 50 based on Foata normal form. 11/555 useless extension candidates. Maximal degree in co-relation 972. Up to 128 conditions per place. [2021-12-14 16:51:21,704 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 3/240 dead transitions. [2021-12-14 16:51:21,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 240 transitions, 594 flow [2021-12-14 16:51:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:51:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:51:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-12-14 16:51:21,706 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8976279650436954 [2021-12-14 16:51:21,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-12-14 16:51:21,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-12-14 16:51:21,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:21,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-12-14 16:51:21,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,710 INFO L186 Difference]: Start difference. First operand has 240 places, 232 transitions, 508 flow. Second operand 3 states and 719 transitions. [2021-12-14 16:51:21,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 240 transitions, 594 flow [2021-12-14 16:51:21,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 240 transitions, 588 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-14 16:51:21,715 INFO L242 Difference]: Finished difference. Result has 238 places, 233 transitions, 520 flow [2021-12-14 16:51:21,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=520, PETRI_PLACES=238, PETRI_TRANSITIONS=233} [2021-12-14 16:51:21,717 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -3 predicate places. [2021-12-14 16:51:21,717 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 233 transitions, 520 flow [2021-12-14 16:51:21,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:21,718 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:21,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:51:21,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1825376933, now seen corresponding path program 2 times [2021-12-14 16:51:21,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:21,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107772442] [2021-12-14 16:51:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:21,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:51:21,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:21,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107772442] [2021-12-14 16:51:21,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107772442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:21,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:21,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:51:21,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282572057] [2021-12-14 16:51:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:21,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:51:21,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:51:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:51:21,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-14 16:51:21,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 233 transitions, 520 flow. Second operand has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:21,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:21,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-14 16:51:21,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:22,060 INFO L129 PetriNetUnfolder]: 188/776 cut-off events. [2021-12-14 16:51:22,061 INFO L130 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2021-12-14 16:51:22,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 776 events. 188/776 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3202 event pairs, 121 based on Foata normal form. 9/741 useless extension candidates. Maximal degree in co-relation 1434. Up to 224 conditions per place. [2021-12-14 16:51:22,065 INFO L132 encePairwiseOnDemand]: 259/267 looper letters, 52 selfloop transitions, 6 changer transitions 12/249 dead transitions. [2021-12-14 16:51:22,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 249 transitions, 709 flow [2021-12-14 16:51:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:51:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:51:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1460 transitions. [2021-12-14 16:51:22,068 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811663991439273 [2021-12-14 16:51:22,068 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1460 transitions. [2021-12-14 16:51:22,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1460 transitions. [2021-12-14 16:51:22,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:22,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1460 transitions. [2021-12-14 16:51:22,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,075 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,075 INFO L186 Difference]: Start difference. First operand has 238 places, 233 transitions, 520 flow. Second operand 7 states and 1460 transitions. [2021-12-14 16:51:22,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 249 transitions, 709 flow [2021-12-14 16:51:22,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 249 transitions, 705 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:51:22,081 INFO L242 Difference]: Finished difference. Result has 245 places, 234 transitions, 538 flow [2021-12-14 16:51:22,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=245, PETRI_TRANSITIONS=234} [2021-12-14 16:51:22,084 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 4 predicate places. [2021-12-14 16:51:22,084 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 234 transitions, 538 flow [2021-12-14 16:51:22,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:22,085 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:22,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:51:22,086 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1044808093, now seen corresponding path program 1 times [2021-12-14 16:51:22,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:22,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451965084] [2021-12-14 16:51:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:22,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:22,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:22,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451965084] [2021-12-14 16:51:22,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451965084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:22,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:22,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:51:22,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174984478] [2021-12-14 16:51:22,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:22,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:51:22,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:51:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:51:22,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-14 16:51:22,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 234 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:22,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-14 16:51:22,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:22,362 INFO L129 PetriNetUnfolder]: 151/716 cut-off events. [2021-12-14 16:51:22,362 INFO L130 PetriNetUnfolder]: For 165/165 co-relation queries the response was YES. [2021-12-14 16:51:22,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 716 events. 151/716 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2510 event pairs, 94 based on Foata normal form. 7/686 useless extension candidates. Maximal degree in co-relation 1291. Up to 247 conditions per place. [2021-12-14 16:51:22,366 INFO L132 encePairwiseOnDemand]: 257/267 looper letters, 51 selfloop transitions, 8 changer transitions 21/259 dead transitions. [2021-12-14 16:51:22,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 259 transitions, 772 flow [2021-12-14 16:51:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:51:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:51:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1867 transitions. [2021-12-14 16:51:22,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7769454848106534 [2021-12-14 16:51:22,370 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1867 transitions. [2021-12-14 16:51:22,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1867 transitions. [2021-12-14 16:51:22,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:22,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1867 transitions. [2021-12-14 16:51:22,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.44444444444446) internal successors, (1867), 9 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,377 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,377 INFO L186 Difference]: Start difference. First operand has 245 places, 234 transitions, 538 flow. Second operand 9 states and 1867 transitions. [2021-12-14 16:51:22,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 259 transitions, 772 flow [2021-12-14 16:51:22,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 259 transitions, 754 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-14 16:51:22,382 INFO L242 Difference]: Finished difference. Result has 249 places, 235 transitions, 554 flow [2021-12-14 16:51:22,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=249, PETRI_TRANSITIONS=235} [2021-12-14 16:51:22,383 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 8 predicate places. [2021-12-14 16:51:22,383 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 235 transitions, 554 flow [2021-12-14 16:51:22,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:22,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:22,384 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:22,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:51:22,384 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 65111761, now seen corresponding path program 1 times [2021-12-14 16:51:22,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:22,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842959720] [2021-12-14 16:51:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:22,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:22,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:22,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842959720] [2021-12-14 16:51:22,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842959720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:22,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235018222] [2021-12-14 16:51:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:22,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:22,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:22,540 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) [2021-12-14 16:51:22,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:51:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:51:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:51:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:51:23,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-14 16:51:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235018222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:51:23,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:51:23,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-14 16:51:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036035496] [2021-12-14 16:51:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:51:23,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 16:51:23,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 16:51:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-12-14 16:51:23,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2021-12-14 16:51:23,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 235 transitions, 554 flow. Second operand has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:23,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:23,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2021-12-14 16:51:23,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:24,389 INFO L129 PetriNetUnfolder]: 189/967 cut-off events. [2021-12-14 16:51:24,389 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2021-12-14 16:51:24,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 967 events. 189/967 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4281 event pairs, 64 based on Foata normal form. 56/973 useless extension candidates. Maximal degree in co-relation 1753. Up to 187 conditions per place. [2021-12-14 16:51:24,394 INFO L132 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 61/307 dead transitions. [2021-12-14 16:51:24,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 307 transitions, 1055 flow [2021-12-14 16:51:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 16:51:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-14 16:51:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4161 transitions. [2021-12-14 16:51:24,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421080791867308 [2021-12-14 16:51:24,401 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4161 transitions. [2021-12-14 16:51:24,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4161 transitions. [2021-12-14 16:51:24,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:24,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4161 transitions. [2021-12-14 16:51:24,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.14285714285714) internal successors, (4161), 21 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:24,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:24,457 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:24,457 INFO L186 Difference]: Start difference. First operand has 249 places, 235 transitions, 554 flow. Second operand 21 states and 4161 transitions. [2021-12-14 16:51:24,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 307 transitions, 1055 flow [2021-12-14 16:51:24,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 307 transitions, 1023 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-12-14 16:51:24,461 INFO L242 Difference]: Finished difference. Result has 270 places, 240 transitions, 640 flow [2021-12-14 16:51:24,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=640, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2021-12-14 16:51:24,462 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 29 predicate places. [2021-12-14 16:51:24,462 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 640 flow [2021-12-14 16:51:24,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:24,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:24,464 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:24,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:51:24,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:24,682 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1048453403, now seen corresponding path program 2 times [2021-12-14 16:51:24,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:24,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927922739] [2021-12-14 16:51:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:24,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 16:51:24,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:24,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927922739] [2021-12-14 16:51:24,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927922739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:24,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:24,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:51:24,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880620132] [2021-12-14 16:51:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:24,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:51:24,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:51:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:51:24,800 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 267 [2021-12-14 16:51:24,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 640 flow. Second operand has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:24,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:24,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 267 [2021-12-14 16:51:24,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:25,072 INFO L129 PetriNetUnfolder]: 562/1433 cut-off events. [2021-12-14 16:51:25,073 INFO L130 PetriNetUnfolder]: For 1736/1784 co-relation queries the response was YES. [2021-12-14 16:51:25,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3366 conditions, 1433 events. 562/1433 cut-off events. For 1736/1784 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7481 event pairs, 259 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 3346. Up to 539 conditions per place. [2021-12-14 16:51:25,082 INFO L132 encePairwiseOnDemand]: 261/267 looper letters, 58 selfloop transitions, 6 changer transitions 0/267 dead transitions. [2021-12-14 16:51:25,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 267 transitions, 874 flow [2021-12-14 16:51:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:51:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:51:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2021-12-14 16:51:25,085 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8554307116104869 [2021-12-14 16:51:25,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2021-12-14 16:51:25,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2021-12-14 16:51:25,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:25,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2021-12-14 16:51:25,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,089 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,090 INFO L186 Difference]: Start difference. First operand has 270 places, 240 transitions, 640 flow. Second operand 5 states and 1142 transitions. [2021-12-14 16:51:25,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 267 transitions, 874 flow [2021-12-14 16:51:25,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 267 transitions, 804 flow, removed 22 selfloop flow, removed 10 redundant places. [2021-12-14 16:51:25,096 INFO L242 Difference]: Finished difference. Result has 258 places, 244 transitions, 632 flow [2021-12-14 16:51:25,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=258, PETRI_TRANSITIONS=244} [2021-12-14 16:51:25,097 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 17 predicate places. [2021-12-14 16:51:25,097 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 244 transitions, 632 flow [2021-12-14 16:51:25,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,098 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:25,098 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:25,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:51:25,098 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1799574207, now seen corresponding path program 3 times [2021-12-14 16:51:25,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:25,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683969060] [2021-12-14 16:51:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 16:51:25,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:25,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683969060] [2021-12-14 16:51:25,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683969060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:25,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:25,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 16:51:25,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274117138] [2021-12-14 16:51:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 16:51:25,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 16:51:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:51:25,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 267 [2021-12-14 16:51:25,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 244 transitions, 632 flow. Second operand has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:25,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 267 [2021-12-14 16:51:25,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:25,753 INFO L129 PetriNetUnfolder]: 763/1883 cut-off events. [2021-12-14 16:51:25,753 INFO L130 PetriNetUnfolder]: For 1147/1181 co-relation queries the response was YES. [2021-12-14 16:51:25,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4212 conditions, 1883 events. 763/1883 cut-off events. For 1147/1181 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11086 event pairs, 349 based on Foata normal form. 30/1824 useless extension candidates. Maximal degree in co-relation 4194. Up to 557 conditions per place. [2021-12-14 16:51:25,763 INFO L132 encePairwiseOnDemand]: 242/267 looper letters, 68 selfloop transitions, 27 changer transitions 0/269 dead transitions. [2021-12-14 16:51:25,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 269 transitions, 912 flow [2021-12-14 16:51:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:51:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:51:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3202 transitions. [2021-12-14 16:51:25,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7054417272526988 [2021-12-14 16:51:25,769 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3202 transitions. [2021-12-14 16:51:25,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3202 transitions. [2021-12-14 16:51:25,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:25,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3202 transitions. [2021-12-14 16:51:25,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 188.35294117647058) internal successors, (3202), 17 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,779 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,780 INFO L186 Difference]: Start difference. First operand has 258 places, 244 transitions, 632 flow. Second operand 17 states and 3202 transitions. [2021-12-14 16:51:25,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 269 transitions, 912 flow [2021-12-14 16:51:25,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 269 transitions, 904 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-14 16:51:25,785 INFO L242 Difference]: Finished difference. Result has 274 places, 246 transitions, 702 flow [2021-12-14 16:51:25,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=702, PETRI_PLACES=274, PETRI_TRANSITIONS=246} [2021-12-14 16:51:25,786 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 33 predicate places. [2021-12-14 16:51:25,786 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 246 transitions, 702 flow [2021-12-14 16:51:25,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:25,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:25,787 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:25,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:51:25,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2136712629, now seen corresponding path program 4 times [2021-12-14 16:51:25,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:25,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938994742] [2021-12-14 16:51:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:25,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:26,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:26,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938994742] [2021-12-14 16:51:26,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938994742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:26,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353782557] [2021-12-14 16:51:26,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:51:26,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:26,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:26,438 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) [2021-12-14 16:51:26,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:51:26,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:51:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:51:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-14 16:51:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:51:26,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:51:26,814 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:51:26,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 16:51:28,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 16:51:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 16:51:28,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 16:51:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:28,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:51:29,470 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-12-14 16:51:29,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 143 [2021-12-14 16:51:29,477 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-14 16:51:29,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 101 [2021-12-14 16:51:29,485 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-14 16:51:29,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 67 [2021-12-14 16:51:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 16:51:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:32,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353782557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:51:32,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:51:32,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2021-12-14 16:51:32,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446156795] [2021-12-14 16:51:32,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:51:32,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-14 16:51:32,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-14 16:51:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=3755, Unknown=1, NotChecked=0, Total=4032 [2021-12-14 16:51:32,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-14 16:51:32,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 246 transitions, 702 flow. Second operand has 64 states, 64 states have (on average 153.140625) internal successors, (9801), 64 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:32,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:32,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-14 16:51:32,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:37,791 INFO L129 PetriNetUnfolder]: 964/2784 cut-off events. [2021-12-14 16:51:37,791 INFO L130 PetriNetUnfolder]: For 2070/2075 co-relation queries the response was YES. [2021-12-14 16:51:37,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 2784 events. 964/2784 cut-off events. For 2070/2075 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18448 event pairs, 183 based on Foata normal form. 7/2678 useless extension candidates. Maximal degree in co-relation 6271. Up to 1119 conditions per place. [2021-12-14 16:51:37,811 INFO L132 encePairwiseOnDemand]: 209/267 looper letters, 185 selfloop transitions, 110 changer transitions 0/429 dead transitions. [2021-12-14 16:51:37,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 429 transitions, 1945 flow [2021-12-14 16:51:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-14 16:51:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-14 16:51:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 8922 transitions. [2021-12-14 16:51:37,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5761332816737699 [2021-12-14 16:51:37,824 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 8922 transitions. [2021-12-14 16:51:37,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 8922 transitions. [2021-12-14 16:51:37,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:37,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 8922 transitions. [2021-12-14 16:51:37,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 153.82758620689654) internal successors, (8922), 58 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:37,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 267.0) internal successors, (15753), 59 states have internal predecessors, (15753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:37,862 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 267.0) internal successors, (15753), 59 states have internal predecessors, (15753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:37,863 INFO L186 Difference]: Start difference. First operand has 274 places, 246 transitions, 702 flow. Second operand 58 states and 8922 transitions. [2021-12-14 16:51:37,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 429 transitions, 1945 flow [2021-12-14 16:51:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 429 transitions, 1844 flow, removed 12 selfloop flow, removed 14 redundant places. [2021-12-14 16:51:37,873 INFO L242 Difference]: Finished difference. Result has 348 places, 333 transitions, 1481 flow [2021-12-14 16:51:37,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1481, PETRI_PLACES=348, PETRI_TRANSITIONS=333} [2021-12-14 16:51:37,874 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2021-12-14 16:51:37,874 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 333 transitions, 1481 flow [2021-12-14 16:51:37,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 153.140625) internal successors, (9801), 64 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:37,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:37,876 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:37,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:51:38,099 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,SelfDestructingSolverStorable10 [2021-12-14 16:51:38,100 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1946406089, now seen corresponding path program 5 times [2021-12-14 16:51:38,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391636578] [2021-12-14 16:51:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:38,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:51:38,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391636578] [2021-12-14 16:51:38,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391636578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640600148] [2021-12-14 16:51:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:51:38,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:38,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:38,707 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) [2021-12-14 16:51:38,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:51:38,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-14 16:51:38,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:51:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-14 16:51:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:51:38,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:51:38,906 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 16:51:38,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 16:51:39,032 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-14 16:51:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 16:51:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-14 16:51:39,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-14 16:51:39,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-14 16:51:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:51:39,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:51:40,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:51:40,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2021-12-14 16:51:40,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-12-14 16:51:40,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-12-14 16:51:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 16:51:40,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640600148] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:40,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:51:40,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [23, 16] total 45 [2021-12-14 16:51:40,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746222383] [2021-12-14 16:51:40,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:40,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:51:40,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:51:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1835, Unknown=1, NotChecked=0, Total=1980 [2021-12-14 16:51:40,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 267 [2021-12-14 16:51:40,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 333 transitions, 1481 flow. Second operand has 14 states, 14 states have (on average 183.64285714285714) internal successors, (2571), 14 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:40,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:40,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 267 [2021-12-14 16:51:40,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:41,716 INFO L129 PetriNetUnfolder]: 1022/2685 cut-off events. [2021-12-14 16:51:41,717 INFO L130 PetriNetUnfolder]: For 8185/8317 co-relation queries the response was YES. [2021-12-14 16:51:41,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9060 conditions, 2685 events. 1022/2685 cut-off events. For 8185/8317 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16949 event pairs, 260 based on Foata normal form. 47/2629 useless extension candidates. Maximal degree in co-relation 9010. Up to 971 conditions per place. [2021-12-14 16:51:41,744 INFO L132 encePairwiseOnDemand]: 248/267 looper letters, 105 selfloop transitions, 43 changer transitions 0/349 dead transitions. [2021-12-14 16:51:41,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 349 transitions, 1909 flow [2021-12-14 16:51:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:51:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:51:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3321 transitions. [2021-12-14 16:51:41,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6910112359550562 [2021-12-14 16:51:41,747 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3321 transitions. [2021-12-14 16:51:41,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3321 transitions. [2021-12-14 16:51:41,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:41,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3321 transitions. [2021-12-14 16:51:41,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 184.5) internal successors, (3321), 18 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:41,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:41,757 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:41,757 INFO L186 Difference]: Start difference. First operand has 348 places, 333 transitions, 1481 flow. Second operand 18 states and 3321 transitions. [2021-12-14 16:51:41,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 349 transitions, 1909 flow [2021-12-14 16:51:41,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 349 transitions, 1801 flow, removed 38 selfloop flow, removed 15 redundant places. [2021-12-14 16:51:41,771 INFO L242 Difference]: Finished difference. Result has 348 places, 325 transitions, 1464 flow [2021-12-14 16:51:41,772 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1464, PETRI_PLACES=348, PETRI_TRANSITIONS=325} [2021-12-14 16:51:41,773 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2021-12-14 16:51:41,773 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 325 transitions, 1464 flow [2021-12-14 16:51:41,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.64285714285714) internal successors, (2571), 14 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:41,774 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:41,774 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:41,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:51:41,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:41,992 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1303190425, now seen corresponding path program 1 times [2021-12-14 16:51:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:41,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321218983] [2021-12-14 16:51:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:41,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:51:42,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:42,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321218983] [2021-12-14 16:51:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321218983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:42,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980905760] [2021-12-14 16:51:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:42,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:42,123 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) [2021-12-14 16:51:42,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:51:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:51:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:51:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:51:42,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:51:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:51:43,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980905760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:51:43,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:51:43,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-14 16:51:43,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476644989] [2021-12-14 16:51:43,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:51:43,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 16:51:43,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:43,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 16:51:43,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-12-14 16:51:43,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2021-12-14 16:51:43,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 325 transitions, 1464 flow. Second operand has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:43,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:43,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2021-12-14 16:51:43,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:44,196 INFO L129 PetriNetUnfolder]: 893/3348 cut-off events. [2021-12-14 16:51:44,197 INFO L130 PetriNetUnfolder]: For 9339/9418 co-relation queries the response was YES. [2021-12-14 16:51:44,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10311 conditions, 3348 events. 893/3348 cut-off events. For 9339/9418 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 25426 event pairs, 333 based on Foata normal form. 39/3237 useless extension candidates. Maximal degree in co-relation 10261. Up to 631 conditions per place. [2021-12-14 16:51:44,225 INFO L132 encePairwiseOnDemand]: 247/267 looper letters, 90 selfloop transitions, 48 changer transitions 75/410 dead transitions. [2021-12-14 16:51:44,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 410 transitions, 2535 flow [2021-12-14 16:51:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:51:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:51:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3945 transitions. [2021-12-14 16:51:44,228 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7387640449438202 [2021-12-14 16:51:44,228 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3945 transitions. [2021-12-14 16:51:44,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3945 transitions. [2021-12-14 16:51:44,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:44,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3945 transitions. [2021-12-14 16:51:44,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.25) internal successors, (3945), 20 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:44,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:44,236 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:44,237 INFO L186 Difference]: Start difference. First operand has 348 places, 325 transitions, 1464 flow. Second operand 20 states and 3945 transitions. [2021-12-14 16:51:44,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 410 transitions, 2535 flow [2021-12-14 16:51:44,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 410 transitions, 2404 flow, removed 27 selfloop flow, removed 14 redundant places. [2021-12-14 16:51:44,258 INFO L242 Difference]: Finished difference. Result has 359 places, 329 transitions, 1535 flow [2021-12-14 16:51:44,259 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1535, PETRI_PLACES=359, PETRI_TRANSITIONS=329} [2021-12-14 16:51:44,260 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 118 predicate places. [2021-12-14 16:51:44,260 INFO L470 AbstractCegarLoop]: Abstraction has has 359 places, 329 transitions, 1535 flow [2021-12-14 16:51:44,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:44,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:44,261 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:44,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:51:44,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:44,478 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash 910836023, now seen corresponding path program 2 times [2021-12-14 16:51:44,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:44,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247967504] [2021-12-14 16:51:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:44,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 16:51:44,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247967504] [2021-12-14 16:51:44,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247967504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:44,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:44,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:51:44,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332966790] [2021-12-14 16:51:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:51:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:51:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:51:44,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2021-12-14 16:51:44,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 329 transitions, 1535 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:44,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:44,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2021-12-14 16:51:44,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:45,015 INFO L129 PetriNetUnfolder]: 685/2647 cut-off events. [2021-12-14 16:51:45,015 INFO L130 PetriNetUnfolder]: For 7619/7700 co-relation queries the response was YES. [2021-12-14 16:51:45,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7883 conditions, 2647 events. 685/2647 cut-off events. For 7619/7700 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 18670 event pairs, 128 based on Foata normal form. 51/2550 useless extension candidates. Maximal degree in co-relation 7827. Up to 378 conditions per place. [2021-12-14 16:51:45,034 INFO L132 encePairwiseOnDemand]: 263/267 looper letters, 45 selfloop transitions, 25 changer transitions 0/352 dead transitions. [2021-12-14 16:51:45,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 352 transitions, 1835 flow [2021-12-14 16:51:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:51:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:51:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2021-12-14 16:51:45,035 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2021-12-14 16:51:45,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2021-12-14 16:51:45,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2021-12-14 16:51:45,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:45,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2021-12-14 16:51:45,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:45,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:45,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:45,038 INFO L186 Difference]: Start difference. First operand has 359 places, 329 transitions, 1535 flow. Second operand 4 states and 971 transitions. [2021-12-14 16:51:45,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 352 transitions, 1835 flow [2021-12-14 16:51:45,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 352 transitions, 1741 flow, removed 13 selfloop flow, removed 9 redundant places. [2021-12-14 16:51:45,052 INFO L242 Difference]: Finished difference. Result has 348 places, 336 transitions, 1636 flow [2021-12-14 16:51:45,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1636, PETRI_PLACES=348, PETRI_TRANSITIONS=336} [2021-12-14 16:51:45,053 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2021-12-14 16:51:45,053 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 336 transitions, 1636 flow [2021-12-14 16:51:45,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:45,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:45,053 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:45,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:51:45,054 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash -512449457, now seen corresponding path program 3 times [2021-12-14 16:51:45,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534605765] [2021-12-14 16:51:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:45,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:51:45,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534605765] [2021-12-14 16:51:45,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534605765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367842379] [2021-12-14 16:51:45,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:51:45,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:45,542 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) [2021-12-14 16:51:45,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:51:45,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:51:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:51:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-14 16:51:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:51:47,223 INFO L354 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2021-12-14 16:51:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-14 16:51:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 16:51:47,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:51:47,710 INFO L354 Elim1Store]: treesize reduction 20, result has 81.7 percent of original size [2021-12-14 16:51:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 107 [2021-12-14 16:51:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 16:51:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367842379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:51:48,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:51:48,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 10] total 45 [2021-12-14 16:51:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867901182] [2021-12-14 16:51:48,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:51:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-14 16:51:48,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-14 16:51:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2021-12-14 16:51:48,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 267 [2021-12-14 16:51:48,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 336 transitions, 1636 flow. Second operand has 45 states, 45 states have (on average 155.0888888888889) internal successors, (6979), 45 states have internal predecessors, (6979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:48,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:48,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 267 [2021-12-14 16:51:48,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:53,781 INFO L129 PetriNetUnfolder]: 7591/16028 cut-off events. [2021-12-14 16:51:53,782 INFO L130 PetriNetUnfolder]: For 67451/69345 co-relation queries the response was YES. [2021-12-14 16:51:53,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56512 conditions, 16028 events. 7591/16028 cut-off events. For 67451/69345 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 138397 event pairs, 1710 based on Foata normal form. 38/14497 useless extension candidates. Maximal degree in co-relation 56456. Up to 4589 conditions per place. [2021-12-14 16:51:54,020 INFO L132 encePairwiseOnDemand]: 205/267 looper letters, 399 selfloop transitions, 308 changer transitions 0/838 dead transitions. [2021-12-14 16:51:54,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 838 transitions, 6701 flow [2021-12-14 16:51:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-14 16:51:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-12-14 16:51:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 12900 transitions. [2021-12-14 16:51:54,036 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5821036956816028 [2021-12-14 16:51:54,037 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 12900 transitions. [2021-12-14 16:51:54,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 12900 transitions. [2021-12-14 16:51:54,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:54,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 12900 transitions. [2021-12-14 16:51:54,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 155.42168674698794) internal successors, (12900), 83 states have internal predecessors, (12900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:54,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 267.0) internal successors, (22428), 84 states have internal predecessors, (22428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:54,079 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 267.0) internal successors, (22428), 84 states have internal predecessors, (22428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:54,079 INFO L186 Difference]: Start difference. First operand has 348 places, 336 transitions, 1636 flow. Second operand 83 states and 12900 transitions. [2021-12-14 16:51:54,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 838 transitions, 6701 flow [2021-12-14 16:51:54,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 838 transitions, 6497 flow, removed 102 selfloop flow, removed 0 redundant places. [2021-12-14 16:51:54,159 INFO L242 Difference]: Finished difference. Result has 465 places, 587 transitions, 4695 flow [2021-12-14 16:51:54,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4695, PETRI_PLACES=465, PETRI_TRANSITIONS=587} [2021-12-14 16:51:54,160 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 224 predicate places. [2021-12-14 16:51:54,160 INFO L470 AbstractCegarLoop]: Abstraction has has 465 places, 587 transitions, 4695 flow [2021-12-14 16:51:54,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 155.0888888888889) internal successors, (6979), 45 states have internal predecessors, (6979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:54,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:54,161 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:51:54,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:51:54,381 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,SelfDestructingSolverStorable14 [2021-12-14 16:51:54,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:51:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash 640490041, now seen corresponding path program 4 times [2021-12-14 16:51:54,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:54,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000618978] [2021-12-14 16:51:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:54,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:51:54,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000618978] [2021-12-14 16:51:54,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000618978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:51:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789957847] [2021-12-14 16:51:54,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:51:54,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:51:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:54,900 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) [2021-12-14 16:51:54,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:51:55,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:51:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:51:55,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-14 16:51:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:51:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:51:57,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:51:58,389 INFO L354 Elim1Store]: treesize reduction 44, result has 75.4 percent of original size [2021-12-14 16:51:58,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 151 [2021-12-14 16:52:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:52:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789957847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:00,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30, 26] total 72 [2021-12-14 16:52:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684550657] [2021-12-14 16:52:00,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-14 16:52:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-14 16:52:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=4371, Unknown=0, NotChecked=0, Total=5112 [2021-12-14 16:52:00,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2021-12-14 16:52:00,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 587 transitions, 4695 flow. Second operand has 72 states, 72 states have (on average 152.01388888888889) internal successors, (10945), 72 states have internal predecessors, (10945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:00,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2021-12-14 16:52:00,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:07,529 INFO L129 PetriNetUnfolder]: 9264/19409 cut-off events. [2021-12-14 16:52:07,529 INFO L130 PetriNetUnfolder]: For 264122/267758 co-relation queries the response was YES. [2021-12-14 16:52:07,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108748 conditions, 19409 events. 9264/19409 cut-off events. For 264122/267758 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 172771 event pairs, 2344 based on Foata normal form. 118/18083 useless extension candidates. Maximal degree in co-relation 108657. Up to 11869 conditions per place. [2021-12-14 16:52:07,917 INFO L132 encePairwiseOnDemand]: 203/267 looper letters, 498 selfloop transitions, 391 changer transitions 0/1019 dead transitions. [2021-12-14 16:52:07,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1019 transitions, 10880 flow [2021-12-14 16:52:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-14 16:52:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-12-14 16:52:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 13617 transitions. [2021-12-14 16:52:07,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2021-12-14 16:52:07,928 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 13617 transitions. [2021-12-14 16:52:07,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 13617 transitions. [2021-12-14 16:52:07,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:07,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 13617 transitions. [2021-12-14 16:52:07,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 153.0) internal successors, (13617), 89 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:07,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 267.0) internal successors, (24030), 90 states have internal predecessors, (24030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:07,972 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 267.0) internal successors, (24030), 90 states have internal predecessors, (24030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:07,974 INFO L186 Difference]: Start difference. First operand has 465 places, 587 transitions, 4695 flow. Second operand 89 states and 13617 transitions. [2021-12-14 16:52:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1019 transitions, 10880 flow [2021-12-14 16:52:08,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1019 transitions, 10421 flow, removed 157 selfloop flow, removed 20 redundant places. [2021-12-14 16:52:08,333 INFO L242 Difference]: Finished difference. Result has 559 places, 871 transitions, 8812 flow [2021-12-14 16:52:08,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4401, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=8812, PETRI_PLACES=559, PETRI_TRANSITIONS=871} [2021-12-14 16:52:08,334 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 318 predicate places. [2021-12-14 16:52:08,334 INFO L470 AbstractCegarLoop]: Abstraction has has 559 places, 871 transitions, 8812 flow [2021-12-14 16:52:08,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 152.01388888888889) internal successors, (10945), 72 states have internal predecessors, (10945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:08,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:08,336 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:52:08,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:08,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 16:52:08,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:52:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash -554543831, now seen corresponding path program 5 times [2021-12-14 16:52:08,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:08,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942401158] [2021-12-14 16:52:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:08,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:52:09,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:09,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942401158] [2021-12-14 16:52:09,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942401158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:09,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965783700] [2021-12-14 16:52:09,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:52:09,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:09,684 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) [2021-12-14 16:52:09,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:52:09,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-14 16:52:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:09,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-14 16:52:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:52:10,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:13,364 INFO L354 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2021-12-14 16:52:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 153 [2021-12-14 16:52:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 16:52:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965783700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:13,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:13,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 16, 9] total 58 [2021-12-14 16:52:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600797762] [2021-12-14 16:52:13,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:13,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-14 16:52:13,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-14 16:52:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 16:52:13,949 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2021-12-14 16:52:13,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 871 transitions, 8812 flow. Second operand has 58 states, 58 states have (on average 152.8448275862069) internal successors, (8865), 58 states have internal predecessors, (8865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:13,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:13,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2021-12-14 16:52:13,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand