./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-two-queue.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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:14:26,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:14:26,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:14:26,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:14:26,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:14:26,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:14:26,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:14:26,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:14:26,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:14:26,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:14:26,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:14:26,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:14:26,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:14:26,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:14:26,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:14:26,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:14:26,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:14:26,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:14:26,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:14:26,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:14:26,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:14:26,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:14:26,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:14:26,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:14:26,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:14:26,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:14:26,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:14:26,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:14:26,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:14:26,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:14:26,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:14:26,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:14:26,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:14:26,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:14:26,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:14:26,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:14:26,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:14:26,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:14:26,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:14:26,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:14:26,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:14:26,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:14:26,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:14:26,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:14:26,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:14:26,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:14:26,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:14:26,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:14:26,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:14:26,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:14:26,472 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:14:26,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:14:26,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:14:26,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:14:26,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:14:26,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:14:26,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:14:26,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:14:26,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:14:26,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:14:26,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:14:26,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:14:26,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:14:26,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:14:26,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:14:26,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:14:26,475 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:14:26,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:14:26,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:14:26,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:14:26,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2021-12-17 23:14:26,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:14:26,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:14:26,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:14:26,676 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:14:26,677 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:14:26,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-12-17 23:14:26,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec636777/abccaad6e8f348a99ca64990a464ae6b/FLAGec9f35a9b [2021-12-17 23:14:27,084 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:14:27,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-12-17 23:14:27,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec636777/abccaad6e8f348a99ca64990a464ae6b/FLAGec9f35a9b [2021-12-17 23:14:27,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec636777/abccaad6e8f348a99ca64990a464ae6b [2021-12-17 23:14:27,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:14:27,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:14:27,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:14:27,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:14:27,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:14:27,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43bf8b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27, skipping insertion in model container [2021-12-17 23:14:27,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:14:27,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:14:27,688 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-two-queue.wvr.c[2987,3000] [2021-12-17 23:14:27,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:14:27,704 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:14:27,718 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-two-queue.wvr.c[2987,3000] [2021-12-17 23:14:27,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:14:27,731 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:14:27,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27 WrapperNode [2021-12-17 23:14:27,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:14:27,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:14:27,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:14:27,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:14:27,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,761 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2021-12-17 23:14:27,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:14:27,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:14:27,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:14:27,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:14:27,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:14:27,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:14:27,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:14:27,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:14:27,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (1/1) ... [2021-12-17 23:14:27,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:14:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:14:27,823 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) [2021-12-17 23:14:27,829 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 [2021-12-17 23:14:27,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:14:27,852 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:14:27,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:14:27,852 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:14:27,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:14:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:14:27,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:14:27,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:14:27,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:14:27,855 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:14:27,910 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:14:27,912 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:14:28,149 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:14:28,243 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:14:28,243 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 23:14:28,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:14:28 BoogieIcfgContainer [2021-12-17 23:14:28,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:14:28,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:14:28,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:14:28,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:14:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:14:27" (1/3) ... [2021-12-17 23:14:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc8bc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:14:28, skipping insertion in model container [2021-12-17 23:14:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:14:27" (2/3) ... [2021-12-17 23:14:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc8bc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:14:28, skipping insertion in model container [2021-12-17 23:14:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:14:28" (3/3) ... [2021-12-17 23:14:28,255 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2021-12-17 23:14:28,258 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:14:28,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:14:28,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:14:28,259 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:14:28,309 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,309 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,309 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,309 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,310 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,312 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,313 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,314 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:14:28,320 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 23:14:28,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:14:28,357 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 [2021-12-17 23:14:28,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 23:14:28,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 178 transitions, 372 flow [2021-12-17 23:14:28,416 INFO L129 PetriNetUnfolder]: 13/176 cut-off events. [2021-12-17 23:14:28,416 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:14:28,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 13/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2021-12-17 23:14:28,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 178 transitions, 372 flow [2021-12-17 23:14:28,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 167 transitions, 346 flow [2021-12-17 23:14:28,450 INFO L129 PetriNetUnfolder]: 13/166 cut-off events. [2021-12-17 23:14:28,450 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:14:28,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:28,464 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] [2021-12-17 23:14:28,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -715974748, now seen corresponding path program 1 times [2021-12-17 23:14:28,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:28,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779079547] [2021-12-17 23:14:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:28,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:28,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779079547] [2021-12-17 23:14:28,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779079547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:14:28,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:14:28,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:14:28,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759486304] [2021-12-17 23:14:28,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:14:28,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:14:28,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:28,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:14:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:14:28,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 178 [2021-12-17 23:14:28,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 167 transitions, 346 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:28,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:28,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 178 [2021-12-17 23:14:28,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:28,848 INFO L129 PetriNetUnfolder]: 17/189 cut-off events. [2021-12-17 23:14:28,849 INFO L130 PetriNetUnfolder]: For 17/20 co-relation queries the response was YES. [2021-12-17 23:14:28,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 189 events. 17/189 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 203 event pairs, 8 based on Foata normal form. 15/192 useless extension candidates. Maximal degree in co-relation 137. Up to 25 conditions per place. [2021-12-17 23:14:28,851 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 8 selfloop transitions, 0 changer transitions 5/158 dead transitions. [2021-12-17 23:14:28,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 158 transitions, 344 flow [2021-12-17 23:14:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:14:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:14:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2021-12-17 23:14:28,860 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9466292134831461 [2021-12-17 23:14:28,861 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2021-12-17 23:14:28,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2021-12-17 23:14:28,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:28,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2021-12-17 23:14:28,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:28,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:28,875 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:28,876 INFO L186 Difference]: Start difference. First operand has 161 places, 167 transitions, 346 flow. Second operand 2 states and 337 transitions. [2021-12-17 23:14:28,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 158 transitions, 344 flow [2021-12-17 23:14:28,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 158 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:14:28,884 INFO L242 Difference]: Finished difference. Result has 158 places, 153 transitions, 310 flow [2021-12-17 23:14:28,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=158, PETRI_TRANSITIONS=153} [2021-12-17 23:14:28,890 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, -3 predicate places. [2021-12-17 23:14:28,890 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 153 transitions, 310 flow [2021-12-17 23:14:28,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:28,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:28,891 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] [2021-12-17 23:14:28,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:14:28,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1666625947, now seen corresponding path program 1 times [2021-12-17 23:14:28,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:28,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741028588] [2021-12-17 23:14:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:28,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:29,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741028588] [2021-12-17 23:14:29,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741028588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:14:29,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:14:29,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:14:29,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659046376] [2021-12-17 23:14:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:14:29,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:14:29,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:29,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:14:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:14:29,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 178 [2021-12-17 23:14:29,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 153 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:29,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 178 [2021-12-17 23:14:29,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:29,243 INFO L129 PetriNetUnfolder]: 112/418 cut-off events. [2021-12-17 23:14:29,244 INFO L130 PetriNetUnfolder]: For 20/32 co-relation queries the response was YES. [2021-12-17 23:14:29,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 418 events. 112/418 cut-off events. For 20/32 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1483 event pairs, 33 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 673. Up to 120 conditions per place. [2021-12-17 23:14:29,248 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 59 selfloop transitions, 5 changer transitions 4/183 dead transitions. [2021-12-17 23:14:29,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 511 flow [2021-12-17 23:14:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:14:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:14:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 819 transitions. [2021-12-17 23:14:29,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7668539325842697 [2021-12-17 23:14:29,255 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 819 transitions. [2021-12-17 23:14:29,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 819 transitions. [2021-12-17 23:14:29,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:29,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 819 transitions. [2021-12-17 23:14:29,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.5) internal successors, (819), 6 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,280 INFO L186 Difference]: Start difference. First operand has 158 places, 153 transitions, 310 flow. Second operand 6 states and 819 transitions. [2021-12-17 23:14:29,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 511 flow [2021-12-17 23:14:29,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:14:29,284 INFO L242 Difference]: Finished difference. Result has 161 places, 156 transitions, 339 flow [2021-12-17 23:14:29,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=161, PETRI_TRANSITIONS=156} [2021-12-17 23:14:29,286 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2021-12-17 23:14:29,286 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 156 transitions, 339 flow [2021-12-17 23:14:29,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:29,287 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] [2021-12-17 23:14:29,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:14:29,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1964545469, now seen corresponding path program 1 times [2021-12-17 23:14:29,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:29,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427244543] [2021-12-17 23:14:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:29,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:29,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427244543] [2021-12-17 23:14:29,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427244543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:14:29,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:14:29,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:14:29,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96302715] [2021-12-17 23:14:29,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:14:29,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:14:29,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:14:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:14:29,383 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2021-12-17 23:14:29,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 156 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:29,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2021-12-17 23:14:29,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:29,512 INFO L129 PetriNetUnfolder]: 109/423 cut-off events. [2021-12-17 23:14:29,512 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-12-17 23:14:29,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 423 events. 109/423 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1589 event pairs, 48 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 706. Up to 117 conditions per place. [2021-12-17 23:14:29,515 INFO L132 encePairwiseOnDemand]: 168/178 looper letters, 37 selfloop transitions, 11 changer transitions 4/184 dead transitions. [2021-12-17 23:14:29,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 184 transitions, 515 flow [2021-12-17 23:14:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:14:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:14:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2021-12-17 23:14:29,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8865168539325843 [2021-12-17 23:14:29,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2021-12-17 23:14:29,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2021-12-17 23:14:29,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:29,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2021-12-17 23:14:29,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 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) [2021-12-17 23:14:29,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 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) [2021-12-17 23:14:29,525 INFO L186 Difference]: Start difference. First operand has 161 places, 156 transitions, 339 flow. Second operand 5 states and 789 transitions. [2021-12-17 23:14:29,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 184 transitions, 515 flow [2021-12-17 23:14:29,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 511 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-17 23:14:29,531 INFO L242 Difference]: Finished difference. Result has 163 places, 160 transitions, 392 flow [2021-12-17 23:14:29,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2021-12-17 23:14:29,533 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 2 predicate places. [2021-12-17 23:14:29,534 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 392 flow [2021-12-17 23:14:29,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,534 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:29,534 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] [2021-12-17 23:14:29,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:14:29,535 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash 76398777, now seen corresponding path program 2 times [2021-12-17 23:14:29,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:29,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928130622] [2021-12-17 23:14:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:29,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:29,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928130622] [2021-12-17 23:14:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928130622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:14:29,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:14:29,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:14:29,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805415708] [2021-12-17 23:14:29,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:14:29,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:14:29,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:14:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:14:29,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2021-12-17 23:14:29,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:29,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2021-12-17 23:14:29,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:29,721 INFO L129 PetriNetUnfolder]: 91/366 cut-off events. [2021-12-17 23:14:29,721 INFO L130 PetriNetUnfolder]: For 116/127 co-relation queries the response was YES. [2021-12-17 23:14:29,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 366 events. 91/366 cut-off events. For 116/127 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1165 event pairs, 28 based on Foata normal form. 13/371 useless extension candidates. Maximal degree in co-relation 682. Up to 116 conditions per place. [2021-12-17 23:14:29,723 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 33 selfloop transitions, 7 changer transitions 6/178 dead transitions. [2021-12-17 23:14:29,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 178 transitions, 532 flow [2021-12-17 23:14:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:14:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:14:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2021-12-17 23:14:29,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8698501872659176 [2021-12-17 23:14:29,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2021-12-17 23:14:29,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2021-12-17 23:14:29,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:29,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2021-12-17 23:14:29,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,730 INFO L186 Difference]: Start difference. First operand has 163 places, 160 transitions, 392 flow. Second operand 6 states and 929 transitions. [2021-12-17 23:14:29,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 178 transitions, 532 flow [2021-12-17 23:14:29,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:14:29,733 INFO L242 Difference]: Finished difference. Result has 166 places, 158 transitions, 385 flow [2021-12-17 23:14:29,734 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2021-12-17 23:14:29,734 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 5 predicate places. [2021-12-17 23:14:29,734 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 385 flow [2021-12-17 23:14:29,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,735 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:29,735 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] [2021-12-17 23:14:29,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:14:29,736 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1283420845, now seen corresponding path program 1 times [2021-12-17 23:14:29,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636738658] [2021-12-17 23:14:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:29,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:29,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636738658] [2021-12-17 23:14:29,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636738658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:14:29,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:14:29,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:14:29,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26510690] [2021-12-17 23:14:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:14:29,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:14:29,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:14:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:14:29,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2021-12-17 23:14:29,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:29,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2021-12-17 23:14:29,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:29,862 INFO L129 PetriNetUnfolder]: 31/275 cut-off events. [2021-12-17 23:14:29,862 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2021-12-17 23:14:29,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 275 events. 31/275 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 564 event pairs, 14 based on Foata normal form. 5/271 useless extension candidates. Maximal degree in co-relation 462. Up to 56 conditions per place. [2021-12-17 23:14:29,863 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 35 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2021-12-17 23:14:29,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 493 flow [2021-12-17 23:14:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:14:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:14:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2021-12-17 23:14:29,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7881219903691814 [2021-12-17 23:14:29,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2021-12-17 23:14:29,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2021-12-17 23:14:29,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:29,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2021-12-17 23:14:29,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,869 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,870 INFO L186 Difference]: Start difference. First operand has 166 places, 158 transitions, 385 flow. Second operand 7 states and 982 transitions. [2021-12-17 23:14:29,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 493 flow [2021-12-17 23:14:29,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 473 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-17 23:14:29,873 INFO L242 Difference]: Finished difference. Result has 170 places, 159 transitions, 389 flow [2021-12-17 23:14:29,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2021-12-17 23:14:29,874 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 9 predicate places. [2021-12-17 23:14:29,874 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 389 flow [2021-12-17 23:14:29,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:29,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:29,875 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] [2021-12-17 23:14:29,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:14:29,875 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2085282566, now seen corresponding path program 1 times [2021-12-17 23:14:29,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203813552] [2021-12-17 23:14:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:29,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:14:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203813552] [2021-12-17 23:14:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203813552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:14:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965020373] [2021-12-17 23:14:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:29,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:14:29,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:14:29,941 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) [2021-12-17 23:14:30,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:14:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 23:14:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:14:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:14:30,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:14:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:14:30,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965020373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:14:30,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:14:30,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-17 23:14:30,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030029627] [2021-12-17 23:14:30,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:14:30,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 23:14:30,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 23:14:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:14:30,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2021-12-17 23:14:30,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:30,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:30,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2021-12-17 23:14:30,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:30,935 INFO L129 PetriNetUnfolder]: 110/441 cut-off events. [2021-12-17 23:14:30,936 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2021-12-17 23:14:30,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 441 events. 110/441 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1460 event pairs, 20 based on Foata normal form. 7/445 useless extension candidates. Maximal degree in co-relation 861. Up to 70 conditions per place. [2021-12-17 23:14:30,938 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 58 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2021-12-17 23:14:30,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 713 flow [2021-12-17 23:14:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:14:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 23:14:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2021-12-17 23:14:30,941 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8628277153558053 [2021-12-17 23:14:30,941 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2021-12-17 23:14:30,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2021-12-17 23:14:30,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:30,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2021-12-17 23:14:30,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:30,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:30,947 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:30,947 INFO L186 Difference]: Start difference. First operand has 170 places, 159 transitions, 389 flow. Second operand 12 states and 1843 transitions. [2021-12-17 23:14:30,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 713 flow [2021-12-17 23:14:30,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 210 transitions, 703 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:14:30,951 INFO L242 Difference]: Finished difference. Result has 181 places, 170 transitions, 498 flow [2021-12-17 23:14:30,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2021-12-17 23:14:30,952 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 20 predicate places. [2021-12-17 23:14:30,952 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 498 flow [2021-12-17 23:14:30,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:30,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:30,953 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] [2021-12-17 23:14:30,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:14:31,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 23:14:31,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 409516862, now seen corresponding path program 1 times [2021-12-17 23:14:31,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:31,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621695169] [2021-12-17 23:14:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:31,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:14:31,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:31,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621695169] [2021-12-17 23:14:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621695169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:14:31,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:14:31,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:14:31,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280987429] [2021-12-17 23:14:31,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:14:31,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:14:31,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:14:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:14:31,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2021-12-17 23:14:31,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:31,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:31,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2021-12-17 23:14:31,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:14:31,330 INFO L129 PetriNetUnfolder]: 46/388 cut-off events. [2021-12-17 23:14:31,330 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2021-12-17 23:14:31,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 388 events. 46/388 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1005 event pairs, 21 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 737. Up to 90 conditions per place. [2021-12-17 23:14:31,332 INFO L132 encePairwiseOnDemand]: 167/178 looper letters, 40 selfloop transitions, 8 changer transitions 17/191 dead transitions. [2021-12-17 23:14:31,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 191 transitions, 682 flow [2021-12-17 23:14:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:14:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 23:14:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1262 transitions. [2021-12-17 23:14:31,334 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.787765293383271 [2021-12-17 23:14:31,334 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1262 transitions. [2021-12-17 23:14:31,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1262 transitions. [2021-12-17 23:14:31,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:14:31,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1262 transitions. [2021-12-17 23:14:31,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.22222222222223) internal successors, (1262), 9 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:31,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:31,340 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:31,340 INFO L186 Difference]: Start difference. First operand has 181 places, 170 transitions, 498 flow. Second operand 9 states and 1262 transitions. [2021-12-17 23:14:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 191 transitions, 682 flow [2021-12-17 23:14:31,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 191 transitions, 645 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-12-17 23:14:31,346 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 491 flow [2021-12-17 23:14:31,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=491, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2021-12-17 23:14:31,347 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 26 predicate places. [2021-12-17 23:14:31,347 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 491 flow [2021-12-17 23:14:31,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:31,348 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:14:31,348 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:14:31,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 23:14:31,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:14:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:14:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1964108106, now seen corresponding path program 1 times [2021-12-17 23:14:31,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:14:31,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694776539] [2021-12-17 23:14:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:31,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:14:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:33,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:14:33,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694776539] [2021-12-17 23:14:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694776539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:14:33,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953247610] [2021-12-17 23:14:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:14:33,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:14:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:14:33,997 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) [2021-12-17 23:14:33,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:14:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:14:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-17 23:14:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:14:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:14:37,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 23:14:37,353 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 48 treesize of output 18 [2021-12-17 23:14:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:37,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:14:38,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:14:38,498 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 78 treesize of output 138 [2021-12-17 23:14:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:14:41,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953247610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:14:41,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:14:41,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 31] total 103 [2021-12-17 23:14:41,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751779976] [2021-12-17 23:14:41,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:14:41,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-17 23:14:41,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:14:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-17 23:14:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=9550, Unknown=0, NotChecked=0, Total=10506 [2021-12-17 23:14:41,611 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2021-12-17 23:14:41,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 491 flow. Second operand has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:14:41,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:14:41,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2021-12-17 23:14:41,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:15:04,882 INFO L129 PetriNetUnfolder]: 1779/3772 cut-off events. [2021-12-17 23:15:04,882 INFO L130 PetriNetUnfolder]: For 2836/2836 co-relation queries the response was YES. [2021-12-17 23:15:04,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9848 conditions, 3772 events. 1779/3772 cut-off events. For 2836/2836 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27159 event pairs, 55 based on Foata normal form. 51/3816 useless extension candidates. Maximal degree in co-relation 9831. Up to 564 conditions per place. [2021-12-17 23:15:04,902 INFO L132 encePairwiseOnDemand]: 121/178 looper letters, 483 selfloop transitions, 476 changer transitions 48/1061 dead transitions. [2021-12-17 23:15:04,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1061 transitions, 5717 flow [2021-12-17 23:15:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-12-17 23:15:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-12-17 23:15:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 13773 transitions. [2021-12-17 23:15:04,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3868820224719101 [2021-12-17 23:15:04,920 INFO L72 ComplementDD]: Start complementDD. Operand 200 states and 13773 transitions. [2021-12-17 23:15:04,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 13773 transitions. [2021-12-17 23:15:04,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:15:04,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 200 states and 13773 transitions. [2021-12-17 23:15:04,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 201 states, 200 states have (on average 68.865) internal successors, (13773), 200 states have internal predecessors, (13773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:04,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 201 states, 201 states have (on average 178.0) internal successors, (35778), 201 states have internal predecessors, (35778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:04,992 INFO L81 ComplementDD]: Finished complementDD. Result has 201 states, 201 states have (on average 178.0) internal successors, (35778), 201 states have internal predecessors, (35778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:04,993 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 491 flow. Second operand 200 states and 13773 transitions. [2021-12-17 23:15:04,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1061 transitions, 5717 flow [2021-12-17 23:15:05,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1061 transitions, 5484 flow, removed 81 selfloop flow, removed 7 redundant places. [2021-12-17 23:15:05,017 INFO L242 Difference]: Finished difference. Result has 459 places, 656 transitions, 4058 flow [2021-12-17 23:15:05,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=200, PETRI_FLOW=4058, PETRI_PLACES=459, PETRI_TRANSITIONS=656} [2021-12-17 23:15:05,020 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 298 predicate places. [2021-12-17 23:15:05,020 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 656 transitions, 4058 flow [2021-12-17 23:15:05,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:05,023 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:15:05,023 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:15:05,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:15:05,239 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,SelfDestructingSolverStorable7 [2021-12-17 23:15:05,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:15:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:15:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash -628938598, now seen corresponding path program 2 times [2021-12-17 23:15:05,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:15:05,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906529164] [2021-12-17 23:15:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:15:05,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:15:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:15:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:15:07,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:15:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906529164] [2021-12-17 23:15:07,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906529164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:15:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445268565] [2021-12-17 23:15:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:15:07,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:15:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:15:07,257 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) [2021-12-17 23:15:07,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:15:07,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:15:07,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:15:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-17 23:15:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:15:09,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:15:10,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:15:10,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:15:10,645 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-17 23:15:10,646 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 41 treesize of output 13 [2021-12-17 23:15:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:15:11,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:15:14,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:15:14,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 138 [2021-12-17 23:15:14,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:15:14,933 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 770 treesize of output 774 [2021-12-17 23:15:14,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:15:14,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 666 treesize of output 684 [2021-12-17 23:15:15,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:15:15,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 588 treesize of output 528 [2021-12-17 23:15:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:15:47,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445268565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:15:47,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:15:47,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 44, 35] total 109 [2021-12-17 23:15:47,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966492904] [2021-12-17 23:15:47,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:15:47,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-17 23:15:47,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:15:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-17 23:15:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=10228, Unknown=47, NotChecked=0, Total=11772 [2021-12-17 23:15:47,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 178 [2021-12-17 23:15:47,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 656 transitions, 4058 flow. Second operand has 109 states, 109 states have (on average 59.48623853211009) internal successors, (6484), 109 states have internal predecessors, (6484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:47,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:15:47,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 178 [2021-12-17 23:15:47,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:15:57,519 INFO L129 PetriNetUnfolder]: 2422/4985 cut-off events. [2021-12-17 23:15:57,519 INFO L130 PetriNetUnfolder]: For 31501/31521 co-relation queries the response was YES. [2021-12-17 23:15:57,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22787 conditions, 4985 events. 2422/4985 cut-off events. For 31501/31521 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 37442 event pairs, 302 based on Foata normal form. 23/4994 useless extension candidates. Maximal degree in co-relation 22691. Up to 2848 conditions per place. [2021-12-17 23:15:57,591 INFO L132 encePairwiseOnDemand]: 115/178 looper letters, 647 selfloop transitions, 487 changer transitions 13/1198 dead transitions. [2021-12-17 23:15:57,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1198 transitions, 10232 flow [2021-12-17 23:15:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-17 23:15:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-12-17 23:15:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 7509 transitions. [2021-12-17 23:15:57,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3429706768977802 [2021-12-17 23:15:57,606 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 7509 transitions. [2021-12-17 23:15:57,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 7509 transitions. [2021-12-17 23:15:57,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:15:57,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 7509 transitions. [2021-12-17 23:15:57,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 61.048780487804876) internal successors, (7509), 123 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:57,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 178.0) internal successors, (22072), 124 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:57,646 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 178.0) internal successors, (22072), 124 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:57,646 INFO L186 Difference]: Start difference. First operand has 459 places, 656 transitions, 4058 flow. Second operand 123 states and 7509 transitions. [2021-12-17 23:15:57,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1198 transitions, 10232 flow [2021-12-17 23:15:57,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1198 transitions, 9392 flow, removed 379 selfloop flow, removed 26 redundant places. [2021-12-17 23:15:57,825 INFO L242 Difference]: Finished difference. Result has 588 places, 999 transitions, 7997 flow [2021-12-17 23:15:57,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=3519, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=7997, PETRI_PLACES=588, PETRI_TRANSITIONS=999} [2021-12-17 23:15:57,826 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 427 predicate places. [2021-12-17 23:15:57,827 INFO L470 AbstractCegarLoop]: Abstraction has has 588 places, 999 transitions, 7997 flow [2021-12-17 23:15:57,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 59.48623853211009) internal successors, (6484), 109 states have internal predecessors, (6484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:15:57,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:15:57,828 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:15:57,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:15:58,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:15:58,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:15:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:15:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash -318480654, now seen corresponding path program 3 times [2021-12-17 23:15:58,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:15:58,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730312220] [2021-12-17 23:15:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:15:58,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:15:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:16:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:16:01,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:16:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730312220] [2021-12-17 23:16:01,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730312220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:16:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485214025] [2021-12-17 23:16:01,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:16:01,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:16:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:16:01,035 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) [2021-12-17 23:16:01,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:16:01,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 23:16:01,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:16:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-17 23:16:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:16:01,297 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 [2021-12-17 23:16:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:16:02,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-17 23:16:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:16:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:16:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:16:03,448 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:16:03,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 23:16:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:16:04,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:16:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:16:05,218 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 29 treesize of output 29 [2021-12-17 23:16:06,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 18 [2021-12-17 23:16:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:16:06,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:17:26,758 INFO L354 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2021-12-17 23:17:26,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 325 treesize of output 151 [2021-12-17 23:17:26,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:17:26,830 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 668 treesize of output 766 [2021-12-17 23:17:26,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:17:26,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 566 treesize of output 608 [2021-12-17 23:17:26,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:17:26,990 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 494 treesize of output 446 [2021-12-17 23:18:12,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:18:12,849 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 [2021-12-17 23:18:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:18:12,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485214025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:18:12,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:18:12,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 124 [2021-12-17 23:18:12,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753771607] [2021-12-17 23:18:12,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:18:12,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-17 23:18:12,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:18:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-17 23:18:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=945, Invalid=14225, Unknown=82, NotChecked=0, Total=15252 [2021-12-17 23:18:12,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 178 [2021-12-17 23:18:12,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 999 transitions, 7997 flow. Second operand has 124 states, 124 states have (on average 56.25806451612903) internal successors, (6976), 124 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:18:12,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:18:12,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 178 [2021-12-17 23:18:12,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:18:32,607 INFO L129 PetriNetUnfolder]: 2841/5792 cut-off events. [2021-12-17 23:18:32,607 INFO L130 PetriNetUnfolder]: For 64876/64947 co-relation queries the response was YES. [2021-12-17 23:18:32,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32257 conditions, 5792 events. 2841/5792 cut-off events. For 64876/64947 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44821 event pairs, 263 based on Foata normal form. 38/5815 useless extension candidates. Maximal degree in co-relation 32129. Up to 3089 conditions per place. [2021-12-17 23:18:32,694 INFO L132 encePairwiseOnDemand]: 119/178 looper letters, 686 selfloop transitions, 633 changer transitions 16/1383 dead transitions. [2021-12-17 23:18:32,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 1383 transitions, 14387 flow [2021-12-17 23:18:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-17 23:18:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-12-17 23:18:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 6557 transitions. [2021-12-17 23:18:32,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.32313226887443325 [2021-12-17 23:18:32,705 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 6557 transitions. [2021-12-17 23:18:32,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 6557 transitions. [2021-12-17 23:18:32,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:18:32,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 6557 transitions. [2021-12-17 23:18:32,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 57.51754385964912) internal successors, (6557), 114 states have internal predecessors, (6557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:18:32,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 178.0) internal successors, (20470), 115 states have internal predecessors, (20470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:18:32,731 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 178.0) internal successors, (20470), 115 states have internal predecessors, (20470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:18:32,731 INFO L186 Difference]: Start difference. First operand has 588 places, 999 transitions, 7997 flow. Second operand 114 states and 6557 transitions. [2021-12-17 23:18:32,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 1383 transitions, 14387 flow [2021-12-17 23:18:33,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1383 transitions, 13535 flow, removed 358 selfloop flow, removed 56 redundant places. [2021-12-17 23:18:33,155 INFO L242 Difference]: Finished difference. Result has 678 places, 1220 transitions, 12012 flow [2021-12-17 23:18:33,156 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=12012, PETRI_PLACES=678, PETRI_TRANSITIONS=1220} [2021-12-17 23:18:33,156 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 517 predicate places. [2021-12-17 23:18:33,157 INFO L470 AbstractCegarLoop]: Abstraction has has 678 places, 1220 transitions, 12012 flow [2021-12-17 23:18:33,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 56.25806451612903) internal successors, (6976), 124 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:18:33,158 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:18:33,158 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:18:33,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:18:33,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:18:33,376 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:18:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:18:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 34943292, now seen corresponding path program 4 times [2021-12-17 23:18:33,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:18:33,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47508523] [2021-12-17 23:18:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:18:33,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:18:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:18:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:18:35,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:18:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47508523] [2021-12-17 23:18:35,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47508523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:18:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469260554] [2021-12-17 23:18:35,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:18:35,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:18:35,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:18:35,488 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) [2021-12-17 23:18:35,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:18:35,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:18:35,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:18:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-17 23:18:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:18:35,653 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 [2021-12-17 23:18:35,693 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:18:35,693 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 18 [2021-12-17 23:18:36,316 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 23:18:36,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-12-17 23:18:36,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:18:38,090 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-17 23:18:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-17 23:18:38,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:18:39,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:18:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:18:40,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 18 [2021-12-17 23:18:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:18:40,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:18:49,101 INFO L354 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2021-12-17 23:18:49,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 298 treesize of output 140 [2021-12-17 23:18:49,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:18:49,161 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 680 treesize of output 768 [2021-12-17 23:18:49,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:18:49,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 588 treesize of output 624 [2021-12-17 23:18:49,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:18:49,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 540 treesize of output 528 [2021-12-17 23:21:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:21:07,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469260554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:21:07,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:21:07,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 45, 46] total 122 [2021-12-17 23:21:07,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579655165] [2021-12-17 23:21:07,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:21:07,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-17 23:21:07,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-17 23:21:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1683, Invalid=12988, Unknown=91, NotChecked=0, Total=14762 [2021-12-17 23:21:07,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 178 [2021-12-17 23:21:07,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 1220 transitions, 12012 flow. Second operand has 122 states, 122 states have (on average 56.295081967213115) internal successors, (6868), 122 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:07,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:07,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 178 [2021-12-17 23:21:07,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:29,245 INFO L129 PetriNetUnfolder]: 4106/8233 cut-off events. [2021-12-17 23:21:29,246 INFO L130 PetriNetUnfolder]: For 128037/128152 co-relation queries the response was YES. [2021-12-17 23:21:29,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53524 conditions, 8233 events. 4106/8233 cut-off events. For 128037/128152 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 67942 event pairs, 160 based on Foata normal form. 90/8306 useless extension candidates. Maximal degree in co-relation 53371. Up to 3004 conditions per place. [2021-12-17 23:21:29,396 INFO L132 encePairwiseOnDemand]: 121/178 looper letters, 919 selfloop transitions, 1170 changer transitions 16/2153 dead transitions. [2021-12-17 23:21:29,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 2153 transitions, 27430 flow [2021-12-17 23:21:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-12-17 23:21:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-12-17 23:21:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 9353 transitions. [2021-12-17 23:21:29,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3284058988764045 [2021-12-17 23:21:29,405 INFO L72 ComplementDD]: Start complementDD. Operand 160 states and 9353 transitions. [2021-12-17 23:21:29,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 160 states and 9353 transitions. [2021-12-17 23:21:29,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:29,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 160 states and 9353 transitions. [2021-12-17 23:21:29,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 161 states, 160 states have (on average 58.45625) internal successors, (9353), 160 states have internal predecessors, (9353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:29,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 161 states, 161 states have (on average 178.0) internal successors, (28658), 161 states have internal predecessors, (28658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:29,434 INFO L81 ComplementDD]: Finished complementDD. Result has 161 states, 161 states have (on average 178.0) internal successors, (28658), 161 states have internal predecessors, (28658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:29,434 INFO L186 Difference]: Start difference. First operand has 678 places, 1220 transitions, 12012 flow. Second operand 160 states and 9353 transitions. [2021-12-17 23:21:29,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 2153 transitions, 27430 flow [2021-12-17 23:21:30,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 2153 transitions, 25452 flow, removed 909 selfloop flow, removed 64 redundant places. [2021-12-17 23:21:30,771 INFO L242 Difference]: Finished difference. Result has 796 places, 1769 transitions, 21457 flow [2021-12-17 23:21:30,772 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=11031, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=160, PETRI_FLOW=21457, PETRI_PLACES=796, PETRI_TRANSITIONS=1769} [2021-12-17 23:21:30,772 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 635 predicate places. [2021-12-17 23:21:30,772 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 1769 transitions, 21457 flow [2021-12-17 23:21:30,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 56.295081967213115) internal successors, (6868), 122 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:30,774 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:30,774 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:21:30,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:21:30,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 23:21:30,990 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1435050418, now seen corresponding path program 5 times [2021-12-17 23:21:30,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289085105] [2021-12-17 23:21:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:30,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:21:33,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:33,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289085105] [2021-12-17 23:21:33,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289085105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:21:33,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619118846] [2021-12-17 23:21:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:21:33,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:21:33,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:21:33,199 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) [2021-12-17 23:21:33,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:21:33,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:21:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:21:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-17 23:21:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:21:33,354 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 [2021-12-17 23:21:33,401 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 23:21:33,402 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 [2021-12-17 23:21:33,989 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-17 23:21:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-12-17 23:21:34,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:21:35,388 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-17 23:21:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2021-12-17 23:21:35,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:21:35,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:21:36,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:21:36,618 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 23:21:36,618 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 47 treesize of output 15 [2021-12-17 23:21:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:21:36,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:21:53,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:21:53,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 161 [2021-12-17 23:21:53,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:21:53,735 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 4780 treesize of output 4568 [2021-12-17 23:21:53,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:21:53,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4460 treesize of output 4076 [2021-12-17 23:21:53,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:21:53,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3980 treesize of output 3836 [2021-12-17 23:21:53,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:21:53,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3740 treesize of output 2876 [2021-12-17 23:21:53,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:21:53,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:21:53,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-12-17 23:21:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536011793] [2021-12-17 23:21:53,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:21:53,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 23:21:53,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 23:21:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=7460, Unknown=57, NotChecked=0, Total=8372 [2021-12-17 23:21:53,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2021-12-17 23:21:53,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 1769 transitions, 21457 flow. Second operand has 41 states, 41 states have (on average 66.41463414634147) internal successors, (2723), 41 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:53,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:53,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2021-12-17 23:21:53,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:01,702 INFO L129 PetriNetUnfolder]: 4629/9311 cut-off events. [2021-12-17 23:22:01,703 INFO L130 PetriNetUnfolder]: For 191612/191756 co-relation queries the response was YES. [2021-12-17 23:22:01,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68901 conditions, 9311 events. 4629/9311 cut-off events. For 191612/191756 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 79333 event pairs, 250 based on Foata normal form. 65/9346 useless extension candidates. Maximal degree in co-relation 68734. Up to 5792 conditions per place. [2021-12-17 23:22:01,934 INFO L132 encePairwiseOnDemand]: 126/178 looper letters, 1496 selfloop transitions, 599 changer transitions 9/2158 dead transitions. [2021-12-17 23:22:01,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 848 places, 2158 transitions, 31014 flow [2021-12-17 23:22:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 23:22:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-17 23:22:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4091 transitions. [2021-12-17 23:22:01,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3895448486002666 [2021-12-17 23:22:01,955 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4091 transitions. [2021-12-17 23:22:01,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4091 transitions. [2021-12-17 23:22:01,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:01,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4091 transitions. [2021-12-17 23:22:01,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 69.33898305084746) internal successors, (4091), 59 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:01,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 178.0) internal successors, (10680), 60 states have internal predecessors, (10680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:01,980 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 178.0) internal successors, (10680), 60 states have internal predecessors, (10680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:01,981 INFO L186 Difference]: Start difference. First operand has 796 places, 1769 transitions, 21457 flow. Second operand 59 states and 4091 transitions. [2021-12-17 23:22:01,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 848 places, 2158 transitions, 31014 flow [2021-12-17 23:22:03,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 2158 transitions, 29134 flow, removed 833 selfloop flow, removed 67 redundant places. [2021-12-17 23:22:03,977 INFO L242 Difference]: Finished difference. Result has 793 places, 1957 transitions, 24610 flow [2021-12-17 23:22:03,979 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=19957, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=24610, PETRI_PLACES=793, PETRI_TRANSITIONS=1957} [2021-12-17 23:22:03,980 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 632 predicate places. [2021-12-17 23:22:03,980 INFO L470 AbstractCegarLoop]: Abstraction has has 793 places, 1957 transitions, 24610 flow [2021-12-17 23:22:03,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 66.41463414634147) internal successors, (2723), 41 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:03,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:03,981 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:22:03,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 23:22:04,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:22:04,190 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash 481475768, now seen corresponding path program 6 times [2021-12-17 23:22:04,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:04,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719369041] [2021-12-17 23:22:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:04,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:22:06,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719369041] [2021-12-17 23:22:06,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719369041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:22:06,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247797556] [2021-12-17 23:22:06,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 23:22:06,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:22:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:22:06,306 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) [2021-12-17 23:22:06,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:22:06,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 23:22:06,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:22:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-17 23:22:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:22:06,999 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 [2021-12-17 23:22:07,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:22:07,867 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:22:07,868 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 [2021-12-17 23:22:08,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:22:08,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:22:08,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:22:08,606 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 23:22:08,607 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 45 treesize of output 13 [2021-12-17 23:22:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:22:08,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:22:24,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 161 [2021-12-17 23:22:24,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:24,867 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 2518 treesize of output 2458 [2021-12-17 23:22:24,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:24,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2350 treesize of output 2320 [2021-12-17 23:22:24,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:24,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2224 treesize of output 1816 [2021-12-17 23:22:25,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:25,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1720 treesize of output 1564 [2021-12-17 23:22:25,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:22:25,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:22:25,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-12-17 23:22:25,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983373597] [2021-12-17 23:22:25,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:22:25,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 23:22:25,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 23:22:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=7531, Unknown=58, NotChecked=0, Total=8372 [2021-12-17 23:22:25,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2021-12-17 23:22:25,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 1957 transitions, 24610 flow. Second operand has 41 states, 41 states have (on average 66.41463414634147) internal successors, (2723), 41 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:25,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:25,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2021-12-17 23:22:25,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:34,765 INFO L129 PetriNetUnfolder]: 5081/10188 cut-off events. [2021-12-17 23:22:34,765 INFO L130 PetriNetUnfolder]: For 199690/199840 co-relation queries the response was YES. [2021-12-17 23:22:34,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75408 conditions, 10188 events. 5081/10188 cut-off events. For 199690/199840 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 88713 event pairs, 306 based on Foata normal form. 62/10208 useless extension candidates. Maximal degree in co-relation 75235. Up to 6966 conditions per place. [2021-12-17 23:22:34,962 INFO L132 encePairwiseOnDemand]: 126/178 looper letters, 1753 selfloop transitions, 488 changer transitions 6/2301 dead transitions. [2021-12-17 23:22:34,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 2301 transitions, 34169 flow [2021-12-17 23:22:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 23:22:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-17 23:22:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4415 transitions. [2021-12-17 23:22:34,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38755266853932585 [2021-12-17 23:22:34,967 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4415 transitions. [2021-12-17 23:22:34,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4415 transitions. [2021-12-17 23:22:34,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:34,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4415 transitions. [2021-12-17 23:22:34,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 68.984375) internal successors, (4415), 64 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:34,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 178.0) internal successors, (11570), 65 states have internal predecessors, (11570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:34,983 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 178.0) internal successors, (11570), 65 states have internal predecessors, (11570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:34,983 INFO L186 Difference]: Start difference. First operand has 793 places, 1957 transitions, 24610 flow. Second operand 64 states and 4415 transitions. [2021-12-17 23:22:34,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 2301 transitions, 34169 flow [2021-12-17 23:22:36,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 2301 transitions, 33885 flow, removed 46 selfloop flow, removed 47 redundant places. [2021-12-17 23:22:36,879 INFO L242 Difference]: Finished difference. Result has 820 places, 2113 transitions, 28605 flow [2021-12-17 23:22:36,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=24342, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=28605, PETRI_PLACES=820, PETRI_TRANSITIONS=2113} [2021-12-17 23:22:36,881 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 659 predicate places. [2021-12-17 23:22:36,882 INFO L470 AbstractCegarLoop]: Abstraction has has 820 places, 2113 transitions, 28605 flow [2021-12-17 23:22:36,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 66.41463414634147) internal successors, (2723), 41 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:36,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:36,883 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:22:36,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:22:37,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:22:37,086 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -341625684, now seen corresponding path program 7 times [2021-12-17 23:22:37,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121281650] [2021-12-17 23:22:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:37,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:22:39,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:39,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121281650] [2021-12-17 23:22:39,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121281650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:22:39,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225575841] [2021-12-17 23:22:39,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 23:22:39,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:22:39,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:22:39,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:22:39,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:22:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 23:22:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:22:41,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:22:41,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:41,725 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 46 treesize of output 24 [2021-12-17 23:22:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:22:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:22:42,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:22:42,774 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 78 treesize of output 138 [2021-12-17 23:22:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:22:46,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225575841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:22:46,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:22:46,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 45, 34] total 110 [2021-12-17 23:22:46,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399536481] [2021-12-17 23:22:46,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:22:46,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-17 23:22:46,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-17 23:22:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=10690, Unknown=0, NotChecked=0, Total=11990 [2021-12-17 23:22:46,083 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2021-12-17 23:22:46,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 2113 transitions, 28605 flow. Second operand has 110 states, 110 states have (on average 66.47272727272727) internal successors, (7312), 110 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:22:46,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:46,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2021-12-17 23:22:46,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:15,334 INFO L129 PetriNetUnfolder]: 7133/14334 cut-off events. [2021-12-17 23:23:15,335 INFO L130 PetriNetUnfolder]: For 331771/331979 co-relation queries the response was YES. [2021-12-17 23:23:15,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111842 conditions, 14334 events. 7133/14334 cut-off events. For 331771/331979 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 133463 event pairs, 119 based on Foata normal form. 153/14472 useless extension candidates. Maximal degree in co-relation 111658. Up to 2995 conditions per place. [2021-12-17 23:23:15,742 INFO L132 encePairwiseOnDemand]: 115/178 looper letters, 1031 selfloop transitions, 2489 changer transitions 33/3607 dead transitions. [2021-12-17 23:23:15,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1034 places, 3607 transitions, 58393 flow [2021-12-17 23:23:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-12-17 23:23:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-12-17 23:23:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 14891 transitions. [2021-12-17 23:23:15,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38551752705431575 [2021-12-17 23:23:15,753 INFO L72 ComplementDD]: Start complementDD. Operand 217 states and 14891 transitions. [2021-12-17 23:23:15,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 217 states and 14891 transitions. [2021-12-17 23:23:15,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:15,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 217 states and 14891 transitions. [2021-12-17 23:23:15,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 218 states, 217 states have (on average 68.6221198156682) internal successors, (14891), 217 states have internal predecessors, (14891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:23:15,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 218 states, 218 states have (on average 178.0) internal successors, (38804), 218 states have internal predecessors, (38804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:23:15,809 INFO L81 ComplementDD]: Finished complementDD. Result has 218 states, 218 states have (on average 178.0) internal successors, (38804), 218 states have internal predecessors, (38804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:23:15,809 INFO L186 Difference]: Start difference. First operand has 820 places, 2113 transitions, 28605 flow. Second operand 217 states and 14891 transitions. [2021-12-17 23:23:15,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1034 places, 3607 transitions, 58393 flow [2021-12-17 23:23:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 987 places, 3607 transitions, 57640 flow, removed 230 selfloop flow, removed 47 redundant places. [2021-12-17 23:23:19,198 INFO L242 Difference]: Finished difference. Result has 1017 places, 3071 transitions, 49011 flow [2021-12-17 23:23:19,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=28118, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=217, PETRI_FLOW=49011, PETRI_PLACES=1017, PETRI_TRANSITIONS=3071} [2021-12-17 23:23:19,201 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 856 predicate places. [2021-12-17 23:23:19,201 INFO L470 AbstractCegarLoop]: Abstraction has has 1017 places, 3071 transitions, 49011 flow [2021-12-17 23:23:19,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 66.47272727272727) internal successors, (7312), 110 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:23:19,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:19,203 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:23:19,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 23:23:19,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 23:23:19,420 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1120209044, now seen corresponding path program 8 times [2021-12-17 23:23:19,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:19,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406177780] [2021-12-17 23:23:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:19,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:23:21,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:21,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406177780] [2021-12-17 23:23:21,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406177780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:23:21,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072798888] [2021-12-17 23:23:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:23:21,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:23:21,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:23:21,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:23:21,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 23:23:22,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:23:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:23:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-17 23:23:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:23:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:23:24,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:23:25,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:23:25,219 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 29 treesize of output 29 [2021-12-17 23:23:25,754 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-12-17 23:23:25,754 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 54 treesize of output 39 [2021-12-17 23:23:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:23:26,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:23:30,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:23:30,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 137 [2021-12-17 23:23:30,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:23:30,536 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 762 treesize of output 766 [2021-12-17 23:23:30,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:23:30,571 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 634 treesize of output 538 [2021-12-17 23:23:30,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:23:30,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 514 treesize of output 532 [2021-12-17 23:24:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:24:11,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072798888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:24:11,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:24:11,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 39] total 117 [2021-12-17 23:24:11,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362903589] [2021-12-17 23:24:11,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:24:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-17 23:24:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-17 23:24:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=922, Invalid=12639, Unknown=11, NotChecked=0, Total=13572 [2021-12-17 23:24:11,412 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 178 [2021-12-17 23:24:11,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1017 places, 3071 transitions, 49011 flow. Second operand has 117 states, 117 states have (on average 59.36752136752137) internal successors, (6946), 117 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:11,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:11,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 178 [2021-12-17 23:24:11,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:50,329 INFO L129 PetriNetUnfolder]: 10531/21340 cut-off events. [2021-12-17 23:24:50,329 INFO L130 PetriNetUnfolder]: For 545848/546104 co-relation queries the response was YES. [2021-12-17 23:24:51,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183360 conditions, 21340 events. 10531/21340 cut-off events. For 545848/546104 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 214414 event pairs, 274 based on Foata normal form. 139/21450 useless extension candidates. Maximal degree in co-relation 183147. Up to 4891 conditions per place. [2021-12-17 23:24:51,153 INFO L132 encePairwiseOnDemand]: 118/178 looper letters, 1693 selfloop transitions, 4043 changer transitions 12/5799 dead transitions. [2021-12-17 23:24:51,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1187 places, 5799 transitions, 107803 flow [2021-12-17 23:24:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-12-17 23:24:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-12-17 23:24:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 11267 transitions. [2021-12-17 23:24:51,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3477898505988394 [2021-12-17 23:24:51,181 INFO L72 ComplementDD]: Start complementDD. Operand 182 states and 11267 transitions. [2021-12-17 23:24:51,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 11267 transitions. [2021-12-17 23:24:51,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:51,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 182 states and 11267 transitions. [2021-12-17 23:24:51,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 183 states, 182 states have (on average 61.90659340659341) internal successors, (11267), 182 states have internal predecessors, (11267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:51,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 183 states, 183 states have (on average 178.0) internal successors, (32574), 183 states have internal predecessors, (32574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:51,225 INFO L81 ComplementDD]: Finished complementDD. Result has 183 states, 183 states have (on average 178.0) internal successors, (32574), 183 states have internal predecessors, (32574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:51,225 INFO L186 Difference]: Start difference. First operand has 1017 places, 3071 transitions, 49011 flow. Second operand 182 states and 11267 transitions. [2021-12-17 23:24:51,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1187 places, 5799 transitions, 107803 flow [2021-12-17 23:25:03,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1108 places, 5799 transitions, 101678 flow, removed 2883 selfloop flow, removed 79 redundant places. [2021-12-17 23:25:03,603 INFO L242 Difference]: Finished difference. Result has 1168 places, 5154 transitions, 93769 flow [2021-12-17 23:25:03,605 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46285, PETRI_DIFFERENCE_MINUEND_PLACES=927, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2084, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=182, PETRI_FLOW=93769, PETRI_PLACES=1168, PETRI_TRANSITIONS=5154} [2021-12-17 23:25:03,606 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 1007 predicate places. [2021-12-17 23:25:03,606 INFO L470 AbstractCegarLoop]: Abstraction has has 1168 places, 5154 transitions, 93769 flow [2021-12-17 23:25:03,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 59.36752136752137) internal successors, (6946), 117 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:25:03,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:03,607 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:25:03,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-17 23:25:03,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 23:25:03,839 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash -473279588, now seen corresponding path program 9 times [2021-12-17 23:25:03,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:03,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005980031] [2021-12-17 23:25:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:03,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:25:06,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005980031] [2021-12-17 23:25:06,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005980031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:25:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480623005] [2021-12-17 23:25:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:25:06,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:25:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:25:06,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:25:06,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 23:25:06,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:25:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:25:06,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-17 23:25:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:25:07,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:25:08,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:25:08,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:25:08,620 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 [2021-12-17 23:25:08,889 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-17 23:25:08,889 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 41 treesize of output 13 [2021-12-17 23:25:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:25:09,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:25:12,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:25:12,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 135 [2021-12-17 23:25:12,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:25:12,509 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 1232 treesize of output 1164 [2021-12-17 23:25:12,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:25:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1056 treesize of output 1020 [2021-12-17 23:25:12,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:25:12,606 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 906 treesize of output 702