./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:50:04,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:50:04,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:50:04,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:50:04,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:50:04,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:50:04,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:50:04,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:50:04,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:50:04,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:50:04,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:50:04,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:50:04,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:50:04,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:50:04,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:50:04,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:50:04,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:50:04,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:50:04,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:50:04,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:50:04,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:50:04,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:50:04,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:50:04,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:50:04,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:50:04,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:50:04,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:50:04,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:50:04,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:50:04,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:50:04,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:50:04,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:50:04,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:50:04,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:50:04,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:50:04,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:50:04,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:50:04,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:50:04,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:50:04,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:50:04,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:50:04,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:50:04,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:50:04,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:50:04,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:50:04,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:50:04,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:50:04,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:50:04,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:50:04,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:50:04,508 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:50:04,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:50:04,509 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:50:04,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:50:04,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:50:04,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:50:04,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:50:04,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:50:04,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:50:04,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:50:04,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:50:04,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:50:04,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:50:04,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:50:04,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:50:04,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:50:04,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:50:04,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:50:04,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:50:04,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:50:04,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:50:04,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:50:04,512 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:50:04,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:50:04,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:50:04,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:50:04,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2021-12-22 13:50:04,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:50:04,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:50:04,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:50:04,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:50:04,740 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:50:04,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-22 13:50:04,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af28e9c61/99953999a705471b80d7bcbb63f81a16/FLAGc9a99b4fa [2021-12-22 13:50:05,129 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:50:05,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-22 13:50:05,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af28e9c61/99953999a705471b80d7bcbb63f81a16/FLAGc9a99b4fa [2021-12-22 13:50:05,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af28e9c61/99953999a705471b80d7bcbb63f81a16 [2021-12-22 13:50:05,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:50:05,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:50:05,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:50:05,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:50:05,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:50:05,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500330c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05, skipping insertion in model container [2021-12-22 13:50:05,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:50:05,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:50:05,739 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/test-easy11.wvr.c[2005,2018] [2021-12-22 13:50:05,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:50:05,749 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:50:05,777 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/test-easy11.wvr.c[2005,2018] [2021-12-22 13:50:05,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:50:05,796 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:50:05,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05 WrapperNode [2021-12-22 13:50:05,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:50:05,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:50:05,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:50:05,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:50:05,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,832 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2021-12-22 13:50:05,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:50:05,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:50:05,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:50:05,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:50:05,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:50:05,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:50:05,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:50:05,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:50:05,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (1/1) ... [2021-12-22 13:50:05,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:50:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:05,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:50:05,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:50:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:50:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:50:05,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:50:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:50:05,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:50:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:50:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:50:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:50:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:50:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:50:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:50:05,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:50:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:50:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:50:05,949 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:50:06,005 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:50:06,007 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:50:06,117 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:50:06,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:50:06,124 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:50:06,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:06 BoogieIcfgContainer [2021-12-22 13:50:06,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:50:06,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:50:06,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:50:06,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:50:06,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:50:05" (1/3) ... [2021-12-22 13:50:06,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797ae572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:06, skipping insertion in model container [2021-12-22 13:50:06,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:05" (2/3) ... [2021-12-22 13:50:06,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797ae572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:06, skipping insertion in model container [2021-12-22 13:50:06,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:06" (3/3) ... [2021-12-22 13:50:06,134 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2021-12-22 13:50:06,137 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:50:06,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:50:06,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:50:06,138 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:50:06,164 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,164 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,164 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,165 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,165 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,165 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,166 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,166 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,167 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,167 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,167 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,168 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,169 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,169 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,169 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,169 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,170 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,171 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,171 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,171 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,172 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,172 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,172 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,173 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,173 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,173 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,174 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,174 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,174 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,174 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,175 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,175 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,175 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,175 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,176 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,177 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,180 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,182 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,182 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,183 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:06,187 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:50:06,222 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:50:06,228 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:50:06,228 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:50:06,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-12-22 13:50:06,306 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-12-22 13:50:06,306 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:50:06,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-12-22 13:50:06,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2021-12-22 13:50:06,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2021-12-22 13:50:06,333 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2021-12-22 13:50:06,333 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:50:06,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:06,334 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] [2021-12-22 13:50:06,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:06,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2021-12-22 13:50:06,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:06,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806843936] [2021-12-22 13:50:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:06,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:06,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806843936] [2021-12-22 13:50:06,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806843936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:06,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:06,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:50:06,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818262669] [2021-12-22 13:50:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:06,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:50:06,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:50:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:50:06,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2021-12-22 13:50:06,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:06,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:06,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2021-12-22 13:50:06,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:06,587 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2021-12-22 13:50:06,587 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:50:06,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-12-22 13:50:06,589 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2021-12-22 13:50:06,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2021-12-22 13:50:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:50:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:50:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2021-12-22 13:50:06,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2021-12-22 13:50:06,600 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2021-12-22 13:50:06,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2021-12-22 13:50:06,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:06,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2021-12-22 13:50:06,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:06,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:06,630 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:06,631 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2021-12-22 13:50:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2021-12-22 13:50:06,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:50:06,638 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2021-12-22 13:50:06,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-12-22 13:50:06,646 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2021-12-22 13:50:06,646 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2021-12-22 13:50:06,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:06,646 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:06,647 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] [2021-12-22 13:50:06,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:50:06,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2021-12-22 13:50:06,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025561095] [2021-12-22 13:50:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:06,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:07,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025561095] [2021-12-22 13:50:07,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025561095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:07,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:07,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 13:50:07,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724625536] [2021-12-22 13:50:07,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:50:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:50:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:50:07,169 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:07,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:07,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:07,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:07,552 INFO L129 PetriNetUnfolder]: 108/359 cut-off events. [2021-12-22 13:50:07,552 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-12-22 13:50:07,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 359 events. 108/359 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1655 event pairs, 27 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 600. Up to 57 conditions per place. [2021-12-22 13:50:07,556 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2021-12-22 13:50:07,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2021-12-22 13:50:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-22 13:50:07,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-22 13:50:07,572 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-22 13:50:07,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-22 13:50:07,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:07,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-22 13:50:07,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,580 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,580 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2021-12-22 13:50:07,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2021-12-22 13:50:07,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:07,583 INFO L242 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2021-12-22 13:50:07,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2021-12-22 13:50:07,584 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2021-12-22 13:50:07,584 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2021-12-22 13:50:07,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:07,586 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] [2021-12-22 13:50:07,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:50:07,586 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1178946693, now seen corresponding path program 2 times [2021-12-22 13:50:07,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335994470] [2021-12-22 13:50:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:07,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:07,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:07,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335994470] [2021-12-22 13:50:07,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335994470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:07,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:07,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:07,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396035626] [2021-12-22 13:50:07,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:07,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:07,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:07,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:07,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:07,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:07,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:08,208 INFO L129 PetriNetUnfolder]: 128/397 cut-off events. [2021-12-22 13:50:08,209 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-12-22 13:50:08,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 397 events. 128/397 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1898 event pairs, 25 based on Foata normal form. 1/392 useless extension candidates. Maximal degree in co-relation 906. Up to 103 conditions per place. [2021-12-22 13:50:08,216 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 23 changer transitions 8/125 dead transitions. [2021-12-22 13:50:08,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 561 flow [2021-12-22 13:50:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-22 13:50:08,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-22 13:50:08,219 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-22 13:50:08,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-22 13:50:08,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:08,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-22 13:50:08,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,230 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,230 INFO L186 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 794 transitions. [2021-12-22 13:50:08,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 561 flow [2021-12-22 13:50:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 545 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-12-22 13:50:08,242 INFO L242 Difference]: Finished difference. Result has 102 places, 93 transitions, 362 flow [2021-12-22 13:50:08,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=362, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2021-12-22 13:50:08,243 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2021-12-22 13:50:08,243 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 362 flow [2021-12-22 13:50:08,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:08,244 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] [2021-12-22 13:50:08,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:50:08,245 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456201, now seen corresponding path program 3 times [2021-12-22 13:50:08,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:08,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402116013] [2021-12-22 13:50:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:08,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:08,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:08,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402116013] [2021-12-22 13:50:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402116013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:08,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:08,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:08,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312112284] [2021-12-22 13:50:08,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:08,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:08,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:08,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:08,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 362 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:08,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:08,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:08,781 INFO L129 PetriNetUnfolder]: 162/447 cut-off events. [2021-12-22 13:50:08,781 INFO L130 PetriNetUnfolder]: For 505/505 co-relation queries the response was YES. [2021-12-22 13:50:08,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 447 events. 162/447 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2042 event pairs, 36 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 1268. Up to 125 conditions per place. [2021-12-22 13:50:08,786 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 33 changer transitions 8/143 dead transitions. [2021-12-22 13:50:08,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 828 flow [2021-12-22 13:50:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-22 13:50:08,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-22 13:50:08,789 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-22 13:50:08,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-22 13:50:08,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:08,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-22 13:50:08,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,794 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,795 INFO L186 Difference]: Start difference. First operand has 102 places, 93 transitions, 362 flow. Second operand 14 states and 790 transitions. [2021-12-22 13:50:08,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 828 flow [2021-12-22 13:50:08,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 143 transitions, 763 flow, removed 10 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:08,804 INFO L242 Difference]: Finished difference. Result has 110 places, 109 transitions, 547 flow [2021-12-22 13:50:08,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=547, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2021-12-22 13:50:08,806 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 33 predicate places. [2021-12-22 13:50:08,806 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 547 flow [2021-12-22 13:50:08,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:08,807 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:08,807 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] [2021-12-22 13:50:08,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:50:08,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1530516955, now seen corresponding path program 4 times [2021-12-22 13:50:08,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:08,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585509096] [2021-12-22 13:50:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:08,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:09,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585509096] [2021-12-22 13:50:09,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585509096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:09,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:09,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:09,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469979791] [2021-12-22 13:50:09,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:09,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:09,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:09,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:09,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 547 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:09,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:09,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:09,388 INFO L129 PetriNetUnfolder]: 166/461 cut-off events. [2021-12-22 13:50:09,388 INFO L130 PetriNetUnfolder]: For 831/840 co-relation queries the response was YES. [2021-12-22 13:50:09,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 461 events. 166/461 cut-off events. For 831/840 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 37 based on Foata normal form. 7/463 useless extension candidates. Maximal degree in co-relation 1495. Up to 129 conditions per place. [2021-12-22 13:50:09,393 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 38 changer transitions 8/151 dead transitions. [2021-12-22 13:50:09,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 151 transitions, 999 flow [2021-12-22 13:50:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-22 13:50:09,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-22 13:50:09,396 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-22 13:50:09,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-22 13:50:09,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:09,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-22 13:50:09,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,401 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,401 INFO L186 Difference]: Start difference. First operand has 110 places, 109 transitions, 547 flow. Second operand 14 states and 792 transitions. [2021-12-22 13:50:09,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 151 transitions, 999 flow [2021-12-22 13:50:09,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 151 transitions, 930 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-12-22 13:50:09,407 INFO L242 Difference]: Finished difference. Result has 117 places, 114 transitions, 657 flow [2021-12-22 13:50:09,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=657, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2021-12-22 13:50:09,408 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2021-12-22 13:50:09,408 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 657 flow [2021-12-22 13:50:09,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:09,409 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] [2021-12-22 13:50:09,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:50:09,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1092049315, now seen corresponding path program 5 times [2021-12-22 13:50:09,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:09,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559219889] [2021-12-22 13:50:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:09,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:09,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559219889] [2021-12-22 13:50:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559219889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:09,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:09,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:09,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312848166] [2021-12-22 13:50:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:09,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:09,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:09,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:09,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 657 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:09,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:09,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:09,840 INFO L129 PetriNetUnfolder]: 164/450 cut-off events. [2021-12-22 13:50:09,841 INFO L130 PetriNetUnfolder]: For 984/986 co-relation queries the response was YES. [2021-12-22 13:50:09,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 450 events. 164/450 cut-off events. For 984/986 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2117 event pairs, 36 based on Foata normal form. 3/449 useless extension candidates. Maximal degree in co-relation 1516. Up to 128 conditions per place. [2021-12-22 13:50:09,845 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 36 changer transitions 8/149 dead transitions. [2021-12-22 13:50:09,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1030 flow [2021-12-22 13:50:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-22 13:50:09,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-22 13:50:09,848 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-22 13:50:09,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-22 13:50:09,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:09,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-22 13:50:09,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,854 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,854 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 657 flow. Second operand 14 states and 790 transitions. [2021-12-22 13:50:09,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1030 flow [2021-12-22 13:50:09,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 948 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:09,861 INFO L242 Difference]: Finished difference. Result has 119 places, 112 transitions, 638 flow [2021-12-22 13:50:09,861 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=638, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2021-12-22 13:50:09,862 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2021-12-22 13:50:09,862 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 638 flow [2021-12-22 13:50:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:09,863 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] [2021-12-22 13:50:09,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:50:09,863 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:09,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2082703733, now seen corresponding path program 6 times [2021-12-22 13:50:09,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:09,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961325523] [2021-12-22 13:50:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:09,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:10,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961325523] [2021-12-22 13:50:10,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961325523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:10,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:10,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:10,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550672181] [2021-12-22 13:50:10,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:10,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:10,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:10,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:10,052 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:10,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 638 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:10,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:10,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:10,355 INFO L129 PetriNetUnfolder]: 176/440 cut-off events. [2021-12-22 13:50:10,355 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2021-12-22 13:50:10,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1610 conditions, 440 events. 176/440 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1998 event pairs, 45 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 1588. Up to 125 conditions per place. [2021-12-22 13:50:10,360 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 42 changer transitions 7/151 dead transitions. [2021-12-22 13:50:10,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 151 transitions, 1095 flow [2021-12-22 13:50:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-22 13:50:10,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-22 13:50:10,363 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-22 13:50:10,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-22 13:50:10,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:10,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-22 13:50:10,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,368 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,368 INFO L186 Difference]: Start difference. First operand has 119 places, 112 transitions, 638 flow. Second operand 14 states and 793 transitions. [2021-12-22 13:50:10,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 151 transitions, 1095 flow [2021-12-22 13:50:10,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 151 transitions, 985 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:10,375 INFO L242 Difference]: Finished difference. Result has 121 places, 121 transitions, 783 flow [2021-12-22 13:50:10,376 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=783, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2021-12-22 13:50:10,376 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 44 predicate places. [2021-12-22 13:50:10,377 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 783 flow [2021-12-22 13:50:10,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:10,377 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] [2021-12-22 13:50:10,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:50:10,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1478308515, now seen corresponding path program 7 times [2021-12-22 13:50:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:10,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030848825] [2021-12-22 13:50:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:10,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:10,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:10,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030848825] [2021-12-22 13:50:10,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030848825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:10,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:10,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:10,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115402861] [2021-12-22 13:50:10,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:10,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:10,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:10,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:10,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 783 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:10,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:10,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:10,834 INFO L129 PetriNetUnfolder]: 181/474 cut-off events. [2021-12-22 13:50:10,835 INFO L130 PetriNetUnfolder]: For 1474/1474 co-relation queries the response was YES. [2021-12-22 13:50:10,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 474 events. 181/474 cut-off events. For 1474/1474 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2280 event pairs, 46 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 1743. Up to 124 conditions per place. [2021-12-22 13:50:10,840 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 44 changer transitions 8/163 dead transitions. [2021-12-22 13:50:10,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 163 transitions, 1241 flow [2021-12-22 13:50:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-22 13:50:10,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-22 13:50:10,843 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-22 13:50:10,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-22 13:50:10,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:10,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-22 13:50:10,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,848 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,848 INFO L186 Difference]: Start difference. First operand has 121 places, 121 transitions, 783 flow. Second operand 14 states and 794 transitions. [2021-12-22 13:50:10,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 163 transitions, 1241 flow [2021-12-22 13:50:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 163 transitions, 1165 flow, removed 13 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:10,857 INFO L242 Difference]: Finished difference. Result has 126 places, 122 transitions, 829 flow [2021-12-22 13:50:10,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=829, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2021-12-22 13:50:10,857 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2021-12-22 13:50:10,858 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 829 flow [2021-12-22 13:50:10,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:10,859 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] [2021-12-22 13:50:10,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:50:10,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash -658866687, now seen corresponding path program 8 times [2021-12-22 13:50:10,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524190990] [2021-12-22 13:50:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:10,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:11,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524190990] [2021-12-22 13:50:11,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524190990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:11,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:11,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:11,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025061309] [2021-12-22 13:50:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:11,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:11,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:11,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:11,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:11,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:11,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:11,359 INFO L129 PetriNetUnfolder]: 185/496 cut-off events. [2021-12-22 13:50:11,359 INFO L130 PetriNetUnfolder]: For 1677/1679 co-relation queries the response was YES. [2021-12-22 13:50:11,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 496 events. 185/496 cut-off events. For 1677/1679 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2511 event pairs, 35 based on Foata normal form. 1/489 useless extension candidates. Maximal degree in co-relation 1842. Up to 134 conditions per place. [2021-12-22 13:50:11,364 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 46 changer transitions 8/161 dead transitions. [2021-12-22 13:50:11,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 161 transitions, 1263 flow [2021-12-22 13:50:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-22 13:50:11,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-22 13:50:11,368 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-22 13:50:11,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-22 13:50:11,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:11,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-22 13:50:11,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,372 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,373 INFO L186 Difference]: Start difference. First operand has 126 places, 122 transitions, 829 flow. Second operand 14 states and 799 transitions. [2021-12-22 13:50:11,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 161 transitions, 1263 flow [2021-12-22 13:50:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1155 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:11,381 INFO L242 Difference]: Finished difference. Result has 129 places, 126 transitions, 892 flow [2021-12-22 13:50:11,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=892, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2021-12-22 13:50:11,382 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2021-12-22 13:50:11,382 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 892 flow [2021-12-22 13:50:11,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:11,383 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] [2021-12-22 13:50:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:50:11,384 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1373975213, now seen corresponding path program 9 times [2021-12-22 13:50:11,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:11,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556346627] [2021-12-22 13:50:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:11,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:11,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:11,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556346627] [2021-12-22 13:50:11,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556346627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:11,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:11,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:11,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732487073] [2021-12-22 13:50:11,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:11,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:11,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:11,555 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:11,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 892 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:11,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:11,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:11,909 INFO L129 PetriNetUnfolder]: 186/523 cut-off events. [2021-12-22 13:50:11,909 INFO L130 PetriNetUnfolder]: For 1916/1920 co-relation queries the response was YES. [2021-12-22 13:50:11,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 523 events. 186/523 cut-off events. For 1916/1920 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2668 event pairs, 27 based on Foata normal form. 3/521 useless extension candidates. Maximal degree in co-relation 1924. Up to 150 conditions per place. [2021-12-22 13:50:11,915 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 44 changer transitions 8/156 dead transitions. [2021-12-22 13:50:11,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 156 transitions, 1253 flow [2021-12-22 13:50:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2021-12-22 13:50:11,918 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2021-12-22 13:50:11,918 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2021-12-22 13:50:11,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2021-12-22 13:50:11,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:11,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2021-12-22 13:50:11,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,924 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,925 INFO L186 Difference]: Start difference. First operand has 129 places, 126 transitions, 892 flow. Second operand 14 states and 795 transitions. [2021-12-22 13:50:11,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 156 transitions, 1253 flow [2021-12-22 13:50:11,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 156 transitions, 1160 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-12-22 13:50:11,934 INFO L242 Difference]: Finished difference. Result has 132 places, 125 transitions, 895 flow [2021-12-22 13:50:11,934 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=895, PETRI_PLACES=132, PETRI_TRANSITIONS=125} [2021-12-22 13:50:11,936 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2021-12-22 13:50:11,936 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 125 transitions, 895 flow [2021-12-22 13:50:11,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:11,937 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] [2021-12-22 13:50:11,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:50:11,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 559222369, now seen corresponding path program 10 times [2021-12-22 13:50:11,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:11,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614909013] [2021-12-22 13:50:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:11,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:12,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:12,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614909013] [2021-12-22 13:50:12,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614909013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:12,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:12,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:12,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082217039] [2021-12-22 13:50:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:12,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:12,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:12,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:12,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:12,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:12,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 125 transitions, 895 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:12,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:12,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:12,433 INFO L129 PetriNetUnfolder]: 180/488 cut-off events. [2021-12-22 13:50:12,433 INFO L130 PetriNetUnfolder]: For 1959/1959 co-relation queries the response was YES. [2021-12-22 13:50:12,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 488 events. 180/488 cut-off events. For 1959/1959 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2436 event pairs, 41 based on Foata normal form. 1/479 useless extension candidates. Maximal degree in co-relation 1850. Up to 141 conditions per place. [2021-12-22 13:50:12,438 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 8/154 dead transitions. [2021-12-22 13:50:12,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 154 transitions, 1241 flow [2021-12-22 13:50:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-22 13:50:12,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-22 13:50:12,440 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-22 13:50:12,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-22 13:50:12,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:12,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-22 13:50:12,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,444 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,444 INFO L186 Difference]: Start difference. First operand has 132 places, 125 transitions, 895 flow. Second operand 14 states and 793 transitions. [2021-12-22 13:50:12,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 154 transitions, 1241 flow [2021-12-22 13:50:12,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1139 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:12,454 INFO L242 Difference]: Finished difference. Result has 134 places, 123 transitions, 864 flow [2021-12-22 13:50:12,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=864, PETRI_PLACES=134, PETRI_TRANSITIONS=123} [2021-12-22 13:50:12,456 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2021-12-22 13:50:12,456 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 123 transitions, 864 flow [2021-12-22 13:50:12,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:12,457 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] [2021-12-22 13:50:12,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:50:12,457 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1221014849, now seen corresponding path program 11 times [2021-12-22 13:50:12,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190852515] [2021-12-22 13:50:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:12,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:12,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190852515] [2021-12-22 13:50:12,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190852515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:12,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:12,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:12,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221412998] [2021-12-22 13:50:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:12,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:12,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:12,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:12,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 123 transitions, 864 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:12,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:12,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:12,897 INFO L129 PetriNetUnfolder]: 184/531 cut-off events. [2021-12-22 13:50:12,898 INFO L130 PetriNetUnfolder]: For 2031/2033 co-relation queries the response was YES. [2021-12-22 13:50:12,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 531 events. 184/531 cut-off events. For 2031/2033 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2749 event pairs, 35 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1915. Up to 147 conditions per place. [2021-12-22 13:50:12,903 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 43 changer transitions 7/157 dead transitions. [2021-12-22 13:50:12,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 157 transitions, 1238 flow [2021-12-22 13:50:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2021-12-22 13:50:12,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2021-12-22 13:50:12,905 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2021-12-22 13:50:12,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2021-12-22 13:50:12,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:12,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2021-12-22 13:50:12,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,913 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,913 INFO L186 Difference]: Start difference. First operand has 134 places, 123 transitions, 864 flow. Second operand 14 states and 795 transitions. [2021-12-22 13:50:12,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 157 transitions, 1238 flow [2021-12-22 13:50:12,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1136 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:12,932 INFO L242 Difference]: Finished difference. Result has 134 places, 125 transitions, 882 flow [2021-12-22 13:50:12,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=882, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2021-12-22 13:50:12,932 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2021-12-22 13:50:12,933 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 882 flow [2021-12-22 13:50:12,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:12,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:12,933 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] [2021-12-22 13:50:12,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:50:12,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 591640657, now seen corresponding path program 12 times [2021-12-22 13:50:12,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:12,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203493805] [2021-12-22 13:50:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:12,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:13,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:13,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203493805] [2021-12-22 13:50:13,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203493805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:13,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:13,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:13,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599491910] [2021-12-22 13:50:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:13,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:13,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:13,095 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:13,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:13,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:13,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:13,386 INFO L129 PetriNetUnfolder]: 179/489 cut-off events. [2021-12-22 13:50:13,386 INFO L130 PetriNetUnfolder]: For 1886/1888 co-relation queries the response was YES. [2021-12-22 13:50:13,388 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 489 events. 179/489 cut-off events. For 1886/1888 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2511 event pairs, 37 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 1845. Up to 143 conditions per place. [2021-12-22 13:50:13,391 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 40 changer transitions 8/153 dead transitions. [2021-12-22 13:50:13,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 153 transitions, 1224 flow [2021-12-22 13:50:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2021-12-22 13:50:13,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2021-12-22 13:50:13,393 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2021-12-22 13:50:13,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2021-12-22 13:50:13,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:13,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2021-12-22 13:50:13,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,397 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,397 INFO L186 Difference]: Start difference. First operand has 134 places, 125 transitions, 882 flow. Second operand 14 states and 791 transitions. [2021-12-22 13:50:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 153 transitions, 1224 flow [2021-12-22 13:50:13,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1126 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:13,406 INFO L242 Difference]: Finished difference. Result has 134 places, 122 transitions, 843 flow [2021-12-22 13:50:13,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=843, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2021-12-22 13:50:13,407 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2021-12-22 13:50:13,407 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 843 flow [2021-12-22 13:50:13,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:13,408 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] [2021-12-22 13:50:13,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:50:13,409 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1539772675, now seen corresponding path program 13 times [2021-12-22 13:50:13,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:13,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294556037] [2021-12-22 13:50:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:13,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:13,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294556037] [2021-12-22 13:50:13,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294556037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:13,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:13,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:13,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710794383] [2021-12-22 13:50:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:13,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:13,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:13,578 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:13,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 843 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:13,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:13,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:13,911 INFO L129 PetriNetUnfolder]: 178/481 cut-off events. [2021-12-22 13:50:13,912 INFO L130 PetriNetUnfolder]: For 1890/1892 co-relation queries the response was YES. [2021-12-22 13:50:13,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 481 events. 178/481 cut-off events. For 1890/1892 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2385 event pairs, 45 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1822. Up to 142 conditions per place. [2021-12-22 13:50:13,917 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 7/153 dead transitions. [2021-12-22 13:50:13,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 153 transitions, 1224 flow [2021-12-22 13:50:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-22 13:50:13,919 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-22 13:50:13,919 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-22 13:50:13,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-22 13:50:13,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:13,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-22 13:50:13,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,923 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,923 INFO L186 Difference]: Start difference. First operand has 134 places, 122 transitions, 843 flow. Second operand 14 states and 792 transitions. [2021-12-22 13:50:13,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 153 transitions, 1224 flow [2021-12-22 13:50:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1126 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:13,931 INFO L242 Difference]: Finished difference. Result has 136 places, 124 transitions, 889 flow [2021-12-22 13:50:13,931 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=889, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2021-12-22 13:50:13,931 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2021-12-22 13:50:13,932 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 889 flow [2021-12-22 13:50:13,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:13,932 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] [2021-12-22 13:50:13,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:50:13,933 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1483632299, now seen corresponding path program 14 times [2021-12-22 13:50:13,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:13,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469497123] [2021-12-22 13:50:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:13,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:14,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469497123] [2021-12-22 13:50:14,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469497123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:14,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:14,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:14,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952009136] [2021-12-22 13:50:14,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:14,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:14,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:14,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:14,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 889 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:14,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:14,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:14,383 INFO L129 PetriNetUnfolder]: 184/541 cut-off events. [2021-12-22 13:50:14,383 INFO L130 PetriNetUnfolder]: For 1993/1997 co-relation queries the response was YES. [2021-12-22 13:50:14,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 541 events. 184/541 cut-off events. For 1993/1997 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2870 event pairs, 42 based on Foata normal form. 3/535 useless extension candidates. Maximal degree in co-relation 1968. Up to 132 conditions per place. [2021-12-22 13:50:14,389 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2021-12-22 13:50:14,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1324 flow [2021-12-22 13:50:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-22 13:50:14,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-22 13:50:14,393 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-22 13:50:14,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-22 13:50:14,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:14,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-22 13:50:14,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,397 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,397 INFO L186 Difference]: Start difference. First operand has 136 places, 124 transitions, 889 flow. Second operand 14 states and 793 transitions. [2021-12-22 13:50:14,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1324 flow [2021-12-22 13:50:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1243 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-12-22 13:50:14,407 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 937 flow [2021-12-22 13:50:14,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=937, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-12-22 13:50:14,408 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2021-12-22 13:50:14,408 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 937 flow [2021-12-22 13:50:14,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:14,408 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] [2021-12-22 13:50:14,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:50:14,409 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1376125007, now seen corresponding path program 15 times [2021-12-22 13:50:14,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688443570] [2021-12-22 13:50:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:14,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:14,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:14,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688443570] [2021-12-22 13:50:14,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688443570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:14,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:14,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:14,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310355089] [2021-12-22 13:50:14,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:14,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:14,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:14,586 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:14,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 937 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:14,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:14,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:14,876 INFO L129 PetriNetUnfolder]: 180/519 cut-off events. [2021-12-22 13:50:14,877 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2021-12-22 13:50:14,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 519 events. 180/519 cut-off events. For 2057/2059 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2790 event pairs, 50 based on Foata normal form. 1/508 useless extension candidates. Maximal degree in co-relation 1958. Up to 152 conditions per place. [2021-12-22 13:50:14,882 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 41 changer transitions 7/162 dead transitions. [2021-12-22 13:50:14,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1364 flow [2021-12-22 13:50:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-22 13:50:14,884 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-22 13:50:14,884 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-22 13:50:14,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-22 13:50:14,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:14,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-22 13:50:14,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,900 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 937 flow. Second operand 14 states and 792 transitions. [2021-12-22 13:50:14,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1364 flow [2021-12-22 13:50:14,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 1271 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:14,911 INFO L242 Difference]: Finished difference. Result has 144 places, 129 transitions, 966 flow [2021-12-22 13:50:14,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=966, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2021-12-22 13:50:14,912 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-22 13:50:14,912 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 966 flow [2021-12-22 13:50:14,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:14,913 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] [2021-12-22 13:50:14,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:50:14,913 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash 145257315, now seen corresponding path program 16 times [2021-12-22 13:50:14,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:14,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561499980] [2021-12-22 13:50:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:14,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:15,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:15,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561499980] [2021-12-22 13:50:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561499980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:15,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:15,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:15,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553885353] [2021-12-22 13:50:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:15,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:15,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:15,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:15,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 966 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:15,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:15,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:15,339 INFO L129 PetriNetUnfolder]: 179/521 cut-off events. [2021-12-22 13:50:15,339 INFO L130 PetriNetUnfolder]: For 2132/2134 co-relation queries the response was YES. [2021-12-22 13:50:15,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 521 events. 179/521 cut-off events. For 2132/2134 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2797 event pairs, 50 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1984. Up to 156 conditions per place. [2021-12-22 13:50:15,345 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2021-12-22 13:50:15,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1355 flow [2021-12-22 13:50:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2021-12-22 13:50:15,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2021-12-22 13:50:15,347 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2021-12-22 13:50:15,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2021-12-22 13:50:15,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:15,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2021-12-22 13:50:15,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,351 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,351 INFO L186 Difference]: Start difference. First operand has 144 places, 129 transitions, 966 flow. Second operand 14 states and 788 transitions. [2021-12-22 13:50:15,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1355 flow [2021-12-22 13:50:15,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1259 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:15,362 INFO L242 Difference]: Finished difference. Result has 144 places, 126 transitions, 921 flow [2021-12-22 13:50:15,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=921, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2021-12-22 13:50:15,362 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-22 13:50:15,363 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 921 flow [2021-12-22 13:50:15,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:15,363 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] [2021-12-22 13:50:15,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:50:15,364 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 17 times [2021-12-22 13:50:15,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866005653] [2021-12-22 13:50:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:15,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:15,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:15,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866005653] [2021-12-22 13:50:15,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866005653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:15,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:15,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:15,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041575327] [2021-12-22 13:50:15,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:15,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:15,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:15,530 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:15,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 921 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:15,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:15,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:15,866 INFO L129 PetriNetUnfolder]: 183/557 cut-off events. [2021-12-22 13:50:15,866 INFO L130 PetriNetUnfolder]: For 2172/2176 co-relation queries the response was YES. [2021-12-22 13:50:15,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 557 events. 183/557 cut-off events. For 2172/2176 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3092 event pairs, 36 based on Foata normal form. 3/551 useless extension candidates. Maximal degree in co-relation 2034. Up to 163 conditions per place. [2021-12-22 13:50:15,872 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 9/155 dead transitions. [2021-12-22 13:50:15,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1284 flow [2021-12-22 13:50:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-22 13:50:15,874 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-22 13:50:15,874 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-22 13:50:15,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-22 13:50:15,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:15,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-22 13:50:15,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,878 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,878 INFO L186 Difference]: Start difference. First operand has 144 places, 126 transitions, 921 flow. Second operand 14 states and 793 transitions. [2021-12-22 13:50:15,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1284 flow [2021-12-22 13:50:15,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1196 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:15,888 INFO L242 Difference]: Finished difference. Result has 144 places, 124 transitions, 895 flow [2021-12-22 13:50:15,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=895, PETRI_PLACES=144, PETRI_TRANSITIONS=124} [2021-12-22 13:50:15,889 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-22 13:50:15,889 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 124 transitions, 895 flow [2021-12-22 13:50:15,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:15,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:15,890 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] [2021-12-22 13:50:15,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:50:15,890 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1375073651, now seen corresponding path program 18 times [2021-12-22 13:50:15,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:15,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674857569] [2021-12-22 13:50:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:15,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:16,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:16,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674857569] [2021-12-22 13:50:16,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674857569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:16,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:16,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:16,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291544709] [2021-12-22 13:50:16,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:16,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:16,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:16,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:16,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 124 transitions, 895 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:16,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:16,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:16,367 INFO L129 PetriNetUnfolder]: 178/517 cut-off events. [2021-12-22 13:50:16,367 INFO L130 PetriNetUnfolder]: For 2190/2192 co-relation queries the response was YES. [2021-12-22 13:50:16,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1988 conditions, 517 events. 178/517 cut-off events. For 2190/2192 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2785 event pairs, 47 based on Foata normal form. 1/506 useless extension candidates. Maximal degree in co-relation 1953. Up to 154 conditions per place. [2021-12-22 13:50:16,373 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 36 changer transitions 9/153 dead transitions. [2021-12-22 13:50:16,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 153 transitions, 1256 flow [2021-12-22 13:50:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2021-12-22 13:50:16,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2021-12-22 13:50:16,376 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2021-12-22 13:50:16,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2021-12-22 13:50:16,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:16,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2021-12-22 13:50:16,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,379 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,380 INFO L186 Difference]: Start difference. First operand has 144 places, 124 transitions, 895 flow. Second operand 14 states and 791 transitions. [2021-12-22 13:50:16,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 153 transitions, 1256 flow [2021-12-22 13:50:16,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 153 transitions, 1166 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:16,390 INFO L242 Difference]: Finished difference. Result has 143 places, 122 transitions, 865 flow [2021-12-22 13:50:16,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=865, PETRI_PLACES=143, PETRI_TRANSITIONS=122} [2021-12-22 13:50:16,390 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2021-12-22 13:50:16,391 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 122 transitions, 865 flow [2021-12-22 13:50:16,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:16,391 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] [2021-12-22 13:50:16,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:50:16,392 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 19 times [2021-12-22 13:50:16,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:16,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679170612] [2021-12-22 13:50:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:16,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:16,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679170612] [2021-12-22 13:50:16,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679170612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:16,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:16,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:16,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568278458] [2021-12-22 13:50:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:16,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:16,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:16,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:16,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 122 transitions, 865 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:16,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:16,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:16,868 INFO L129 PetriNetUnfolder]: 181/523 cut-off events. [2021-12-22 13:50:16,868 INFO L130 PetriNetUnfolder]: For 2190/2192 co-relation queries the response was YES. [2021-12-22 13:50:16,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 523 events. 181/523 cut-off events. For 2190/2192 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2849 event pairs, 48 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 1972. Up to 152 conditions per place. [2021-12-22 13:50:16,874 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 8/156 dead transitions. [2021-12-22 13:50:16,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 156 transitions, 1261 flow [2021-12-22 13:50:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-22 13:50:16,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-22 13:50:16,876 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-22 13:50:16,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-22 13:50:16,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:16,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-22 13:50:16,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,883 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,883 INFO L186 Difference]: Start difference. First operand has 143 places, 122 transitions, 865 flow. Second operand 14 states and 794 transitions. [2021-12-22 13:50:16,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 156 transitions, 1261 flow [2021-12-22 13:50:16,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 156 transitions, 1175 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:16,893 INFO L242 Difference]: Finished difference. Result has 143 places, 123 transitions, 883 flow [2021-12-22 13:50:16,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=883, PETRI_PLACES=143, PETRI_TRANSITIONS=123} [2021-12-22 13:50:16,893 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2021-12-22 13:50:16,894 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 123 transitions, 883 flow [2021-12-22 13:50:16,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:16,894 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] [2021-12-22 13:50:16,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:50:16,894 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1471288227, now seen corresponding path program 20 times [2021-12-22 13:50:16,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764943132] [2021-12-22 13:50:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:16,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:17,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764943132] [2021-12-22 13:50:17,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764943132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:17,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:17,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:50:17,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169765596] [2021-12-22 13:50:17,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:17,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:50:17,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:50:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:50:17,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-22 13:50:17,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 123 transitions, 883 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:17,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-22 13:50:17,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:17,360 INFO L129 PetriNetUnfolder]: 180/555 cut-off events. [2021-12-22 13:50:17,360 INFO L130 PetriNetUnfolder]: For 2299/2303 co-relation queries the response was YES. [2021-12-22 13:50:17,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2065 conditions, 555 events. 180/555 cut-off events. For 2299/2303 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3050 event pairs, 38 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 2029. Up to 162 conditions per place. [2021-12-22 13:50:17,366 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 7/155 dead transitions. [2021-12-22 13:50:17,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 155 transitions, 1270 flow [2021-12-22 13:50:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:50:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:50:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-22 13:50:17,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-22 13:50:17,370 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-22 13:50:17,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-22 13:50:17,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:17,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-22 13:50:17,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,377 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,377 INFO L186 Difference]: Start difference. First operand has 143 places, 123 transitions, 883 flow. Second operand 14 states and 793 transitions. [2021-12-22 13:50:17,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 155 transitions, 1270 flow [2021-12-22 13:50:17,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1178 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:17,401 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 893 flow [2021-12-22 13:50:17,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2021-12-22 13:50:17,402 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-22 13:50:17,403 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 893 flow [2021-12-22 13:50:17,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,403 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:17,403 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] [2021-12-22 13:50:17,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:50:17,404 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:17,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash -18586231, now seen corresponding path program 1 times [2021-12-22 13:50:17,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:17,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103526700] [2021-12-22 13:50:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:17,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:17,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103526700] [2021-12-22 13:50:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103526700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055033362] [2021-12-22 13:50:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:17,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:17,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:17,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:17,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:50:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:17,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:50:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:17,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:17,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055033362] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:17,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:50:17,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-22 13:50:17,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308294983] [2021-12-22 13:50:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:17,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:17,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:50:17,800 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:17,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 893 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:17,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:17,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:17,898 INFO L129 PetriNetUnfolder]: 187/534 cut-off events. [2021-12-22 13:50:17,898 INFO L130 PetriNetUnfolder]: For 2719/2719 co-relation queries the response was YES. [2021-12-22 13:50:17,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 534 events. 187/534 cut-off events. For 2719/2719 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2792 event pairs, 18 based on Foata normal form. 7/535 useless extension candidates. Maximal degree in co-relation 2049. Up to 157 conditions per place. [2021-12-22 13:50:17,904 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 90 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2021-12-22 13:50:17,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 174 transitions, 1654 flow [2021-12-22 13:50:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:50:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:50:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2021-12-22 13:50:17,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7898193760262726 [2021-12-22 13:50:17,908 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2021-12-22 13:50:17,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2021-12-22 13:50:17,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:17,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2021-12-22 13:50:17,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,911 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 893 flow. Second operand 7 states and 481 transitions. [2021-12-22 13:50:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 174 transitions, 1654 flow [2021-12-22 13:50:17,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 174 transitions, 1531 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-22 13:50:17,922 INFO L242 Difference]: Finished difference. Result has 137 places, 139 transitions, 1057 flow [2021-12-22 13:50:17,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1057, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2021-12-22 13:50:17,923 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2021-12-22 13:50:17,923 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1057 flow [2021-12-22 13:50:17,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:17,924 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] [2021-12-22 13:50:17,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:50:18,147 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,SelfDestructingSolverStorable21 [2021-12-22 13:50:18,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1524172391, now seen corresponding path program 2 times [2021-12-22 13:50:18,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:18,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327131523] [2021-12-22 13:50:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:18,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:18,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:18,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327131523] [2021-12-22 13:50:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327131523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:18,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:18,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:18,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634396668] [2021-12-22 13:50:18,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:18,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:18,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:18,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:18,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1057 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:18,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:18,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:18,308 INFO L129 PetriNetUnfolder]: 201/624 cut-off events. [2021-12-22 13:50:18,308 INFO L130 PetriNetUnfolder]: For 3046/3051 co-relation queries the response was YES. [2021-12-22 13:50:18,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 624 events. 201/624 cut-off events. For 3046/3051 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3510 event pairs, 44 based on Foata normal form. 5/623 useless extension candidates. Maximal degree in co-relation 2373. Up to 132 conditions per place. [2021-12-22 13:50:18,314 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 101 selfloop transitions, 35 changer transitions 5/190 dead transitions. [2021-12-22 13:50:18,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 1803 flow [2021-12-22 13:50:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:50:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:50:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2021-12-22 13:50:18,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2021-12-22 13:50:18,315 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2021-12-22 13:50:18,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2021-12-22 13:50:18,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:18,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2021-12-22 13:50:18,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,317 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,317 INFO L186 Difference]: Start difference. First operand has 137 places, 139 transitions, 1057 flow. Second operand 7 states and 486 transitions. [2021-12-22 13:50:18,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 1803 flow [2021-12-22 13:50:18,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 190 transitions, 1721 flow, removed 41 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:18,330 INFO L242 Difference]: Finished difference. Result has 146 places, 147 transitions, 1246 flow [2021-12-22 13:50:18,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2021-12-22 13:50:18,331 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2021-12-22 13:50:18,331 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 1246 flow [2021-12-22 13:50:18,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:18,332 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] [2021-12-22 13:50:18,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:50:18,332 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -404474333, now seen corresponding path program 1 times [2021-12-22 13:50:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206292235] [2021-12-22 13:50:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:18,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:18,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206292235] [2021-12-22 13:50:18,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206292235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637468509] [2021-12-22 13:50:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:18,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:18,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:50:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:50:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:18,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637468509] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:18,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:50:18,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-22 13:50:18,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263639978] [2021-12-22 13:50:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:18,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:18,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:50:18,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:18,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 1246 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:18,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:18,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:18,691 INFO L129 PetriNetUnfolder]: 204/587 cut-off events. [2021-12-22 13:50:18,691 INFO L130 PetriNetUnfolder]: For 3694/3698 co-relation queries the response was YES. [2021-12-22 13:50:18,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2427 conditions, 587 events. 204/587 cut-off events. For 3694/3698 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3077 event pairs, 25 based on Foata normal form. 10/590 useless extension candidates. Maximal degree in co-relation 2388. Up to 171 conditions per place. [2021-12-22 13:50:18,697 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 108 selfloop transitions, 41 changer transitions 0/198 dead transitions. [2021-12-22 13:50:18,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2032 flow [2021-12-22 13:50:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:50:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:50:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-22 13:50:18,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-22 13:50:18,698 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-22 13:50:18,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-22 13:50:18,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:18,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-22 13:50:18,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,700 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,701 INFO L186 Difference]: Start difference. First operand has 146 places, 147 transitions, 1246 flow. Second operand 7 states and 483 transitions. [2021-12-22 13:50:18,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2032 flow [2021-12-22 13:50:18,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 1924 flow, removed 37 selfloop flow, removed 8 redundant places. [2021-12-22 13:50:18,714 INFO L242 Difference]: Finished difference. Result has 144 places, 161 transitions, 1428 flow [2021-12-22 13:50:18,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1428, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2021-12-22 13:50:18,715 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-22 13:50:18,715 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1428 flow [2021-12-22 13:50:18,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:18,715 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] [2021-12-22 13:50:18,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:18,930 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,SelfDestructingSolverStorable23 [2021-12-22 13:50:18,931 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1480469883, now seen corresponding path program 3 times [2021-12-22 13:50:18,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163223779] [2021-12-22 13:50:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:18,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:18,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:18,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163223779] [2021-12-22 13:50:18,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163223779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:18,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:18,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:18,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296083648] [2021-12-22 13:50:18,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:18,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:18,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:18,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:18,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1428 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:18,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:18,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:19,122 INFO L129 PetriNetUnfolder]: 225/681 cut-off events. [2021-12-22 13:50:19,122 INFO L130 PetriNetUnfolder]: For 4372/4376 co-relation queries the response was YES. [2021-12-22 13:50:19,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 681 events. 225/681 cut-off events. For 4372/4376 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3905 event pairs, 52 based on Foata normal form. 7/679 useless extension candidates. Maximal degree in co-relation 2823. Up to 167 conditions per place. [2021-12-22 13:50:19,128 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 119 selfloop transitions, 62 changer transitions 0/230 dead transitions. [2021-12-22 13:50:19,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 2429 flow [2021-12-22 13:50:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2021-12-22 13:50:19,130 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2021-12-22 13:50:19,130 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2021-12-22 13:50:19,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2021-12-22 13:50:19,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:19,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2021-12-22 13:50:19,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,133 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,133 INFO L186 Difference]: Start difference. First operand has 144 places, 161 transitions, 1428 flow. Second operand 8 states and 566 transitions. [2021-12-22 13:50:19,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 2429 flow [2021-12-22 13:50:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 230 transitions, 2393 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-22 13:50:19,149 INFO L242 Difference]: Finished difference. Result has 155 places, 180 transitions, 1877 flow [2021-12-22 13:50:19,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1877, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2021-12-22 13:50:19,150 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 78 predicate places. [2021-12-22 13:50:19,150 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 1877 flow [2021-12-22 13:50:19,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:19,150 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] [2021-12-22 13:50:19,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:50:19,151 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1581789521, now seen corresponding path program 2 times [2021-12-22 13:50:19,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223400824] [2021-12-22 13:50:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:19,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:19,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223400824] [2021-12-22 13:50:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223400824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123324141] [2021-12-22 13:50:19,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:50:19,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:19,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:19,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:50:19,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:50:19,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:19,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:50:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:19,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123324141] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:19,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:50:19,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-22 13:50:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156246895] [2021-12-22 13:50:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:19,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:19,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:50:19,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:19,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 1877 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:19,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:19,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:19,627 INFO L129 PetriNetUnfolder]: 252/859 cut-off events. [2021-12-22 13:50:19,628 INFO L130 PetriNetUnfolder]: For 5889/5899 co-relation queries the response was YES. [2021-12-22 13:50:19,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 859 events. 252/859 cut-off events. For 5889/5899 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5504 event pairs, 48 based on Foata normal form. 10/859 useless extension candidates. Maximal degree in co-relation 3506. Up to 163 conditions per place. [2021-12-22 13:50:19,642 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 81 changer transitions 0/247 dead transitions. [2021-12-22 13:50:19,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 247 transitions, 2905 flow [2021-12-22 13:50:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:50:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:50:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2021-12-22 13:50:19,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256704980842912 [2021-12-22 13:50:19,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 431 transitions. [2021-12-22 13:50:19,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 431 transitions. [2021-12-22 13:50:19,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:19,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 431 transitions. [2021-12-22 13:50:19,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,647 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,647 INFO L186 Difference]: Start difference. First operand has 155 places, 180 transitions, 1877 flow. Second operand 6 states and 431 transitions. [2021-12-22 13:50:19,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 247 transitions, 2905 flow [2021-12-22 13:50:19,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 247 transitions, 2761 flow, removed 47 selfloop flow, removed 2 redundant places. [2021-12-22 13:50:19,669 INFO L242 Difference]: Finished difference. Result has 163 places, 202 transitions, 2363 flow [2021-12-22 13:50:19,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2363, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2021-12-22 13:50:19,671 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 86 predicate places. [2021-12-22 13:50:19,671 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 2363 flow [2021-12-22 13:50:19,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:19,671 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] [2021-12-22 13:50:19,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:19,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:19,894 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1370591913, now seen corresponding path program 3 times [2021-12-22 13:50:19,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:19,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133388584] [2021-12-22 13:50:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:19,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:19,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133388584] [2021-12-22 13:50:19,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133388584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:19,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:19,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:19,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539101031] [2021-12-22 13:50:19,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:19,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:19,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:19,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:19,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 2363 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:19,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:19,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:20,089 INFO L129 PetriNetUnfolder]: 254/860 cut-off events. [2021-12-22 13:50:20,090 INFO L130 PetriNetUnfolder]: For 7095/7121 co-relation queries the response was YES. [2021-12-22 13:50:20,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3777 conditions, 860 events. 254/860 cut-off events. For 7095/7121 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5562 event pairs, 63 based on Foata normal form. 9/854 useless extension candidates. Maximal degree in co-relation 3734. Up to 164 conditions per place. [2021-12-22 13:50:20,099 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 60 changer transitions 5/242 dead transitions. [2021-12-22 13:50:20,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 242 transitions, 3086 flow [2021-12-22 13:50:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 558 transitions. [2021-12-22 13:50:20,101 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8017241379310345 [2021-12-22 13:50:20,101 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 558 transitions. [2021-12-22 13:50:20,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 558 transitions. [2021-12-22 13:50:20,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:20,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 558 transitions. [2021-12-22 13:50:20,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.75) internal successors, (558), 8 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,103 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,103 INFO L186 Difference]: Start difference. First operand has 163 places, 202 transitions, 2363 flow. Second operand 8 states and 558 transitions. [2021-12-22 13:50:20,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 242 transitions, 3086 flow [2021-12-22 13:50:20,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 242 transitions, 3017 flow, removed 19 selfloop flow, removed 4 redundant places. [2021-12-22 13:50:20,130 INFO L242 Difference]: Finished difference. Result has 170 places, 207 transitions, 2548 flow [2021-12-22 13:50:20,130 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2548, PETRI_PLACES=170, PETRI_TRANSITIONS=207} [2021-12-22 13:50:20,131 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2021-12-22 13:50:20,131 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 207 transitions, 2548 flow [2021-12-22 13:50:20,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:20,132 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] [2021-12-22 13:50:20,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:50:20,132 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash -905738307, now seen corresponding path program 4 times [2021-12-22 13:50:20,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372585329] [2021-12-22 13:50:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:20,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:20,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372585329] [2021-12-22 13:50:20,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372585329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:20,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:20,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:20,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333021416] [2021-12-22 13:50:20,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:20,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:20,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:20,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:20,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 207 transitions, 2548 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:20,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:20,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:20,330 INFO L129 PetriNetUnfolder]: 239/788 cut-off events. [2021-12-22 13:50:20,331 INFO L130 PetriNetUnfolder]: For 7399/7425 co-relation queries the response was YES. [2021-12-22 13:50:20,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3604 conditions, 788 events. 239/788 cut-off events. For 7399/7425 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4887 event pairs, 46 based on Foata normal form. 5/784 useless extension candidates. Maximal degree in co-relation 3560. Up to 182 conditions per place. [2021-12-22 13:50:20,338 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 137 selfloop transitions, 54 changer transitions 5/245 dead transitions. [2021-12-22 13:50:20,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 245 transitions, 3229 flow [2021-12-22 13:50:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2021-12-22 13:50:20,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-12-22 13:50:20,340 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2021-12-22 13:50:20,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2021-12-22 13:50:20,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:20,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2021-12-22 13:50:20,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,342 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,342 INFO L186 Difference]: Start difference. First operand has 170 places, 207 transitions, 2548 flow. Second operand 8 states and 554 transitions. [2021-12-22 13:50:20,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 245 transitions, 3229 flow [2021-12-22 13:50:20,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 245 transitions, 3142 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-22 13:50:20,367 INFO L242 Difference]: Finished difference. Result has 174 places, 212 transitions, 2715 flow [2021-12-22 13:50:20,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2715, PETRI_PLACES=174, PETRI_TRANSITIONS=212} [2021-12-22 13:50:20,371 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 97 predicate places. [2021-12-22 13:50:20,371 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 212 transitions, 2715 flow [2021-12-22 13:50:20,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:20,372 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] [2021-12-22 13:50:20,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:50:20,372 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 355816187, now seen corresponding path program 5 times [2021-12-22 13:50:20,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873742632] [2021-12-22 13:50:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:20,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:20,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873742632] [2021-12-22 13:50:20,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873742632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:20,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:20,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:20,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484911826] [2021-12-22 13:50:20,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:20,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:20,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:20,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 212 transitions, 2715 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:20,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:20,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:20,583 INFO L129 PetriNetUnfolder]: 246/773 cut-off events. [2021-12-22 13:50:20,583 INFO L130 PetriNetUnfolder]: For 8661/8680 co-relation queries the response was YES. [2021-12-22 13:50:20,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3745 conditions, 773 events. 246/773 cut-off events. For 8661/8680 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4641 event pairs, 46 based on Foata normal form. 9/774 useless extension candidates. Maximal degree in co-relation 3700. Up to 190 conditions per place. [2021-12-22 13:50:20,592 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2021-12-22 13:50:20,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 261 transitions, 3643 flow [2021-12-22 13:50:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2021-12-22 13:50:20,594 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-22 13:50:20,594 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2021-12-22 13:50:20,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2021-12-22 13:50:20,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:20,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2021-12-22 13:50:20,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,596 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,597 INFO L186 Difference]: Start difference. First operand has 174 places, 212 transitions, 2715 flow. Second operand 8 states and 568 transitions. [2021-12-22 13:50:20,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 261 transitions, 3643 flow [2021-12-22 13:50:20,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 3544 flow, removed 4 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:20,625 INFO L242 Difference]: Finished difference. Result has 174 places, 222 transitions, 3136 flow [2021-12-22 13:50:20,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3136, PETRI_PLACES=174, PETRI_TRANSITIONS=222} [2021-12-22 13:50:20,628 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 97 predicate places. [2021-12-22 13:50:20,628 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 222 transitions, 3136 flow [2021-12-22 13:50:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,628 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:20,628 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] [2021-12-22 13:50:20,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:50:20,629 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1592299911, now seen corresponding path program 4 times [2021-12-22 13:50:20,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:20,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238443504] [2021-12-22 13:50:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:20,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:20,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:20,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238443504] [2021-12-22 13:50:20,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238443504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:20,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026909905] [2021-12-22 13:50:20,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:50:20,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:20,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:20,661 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) [2021-12-22 13:50:20,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:50:20,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:50:20,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:50:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:20,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:20,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026909905] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:20,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:50:20,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-22 13:50:20,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198305773] [2021-12-22 13:50:20,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:20,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:50:20,980 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:20,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 222 transitions, 3136 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:20,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:20,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:21,127 INFO L129 PetriNetUnfolder]: 230/714 cut-off events. [2021-12-22 13:50:21,128 INFO L130 PetriNetUnfolder]: For 9659/9659 co-relation queries the response was YES. [2021-12-22 13:50:21,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3680 conditions, 714 events. 230/714 cut-off events. For 9659/9659 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4090 event pairs, 45 based on Foata normal form. 8/717 useless extension candidates. Maximal degree in co-relation 3637. Up to 229 conditions per place. [2021-12-22 13:50:21,135 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 131 selfloop transitions, 67 changer transitions 0/247 dead transitions. [2021-12-22 13:50:21,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 247 transitions, 3702 flow [2021-12-22 13:50:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:50:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:50:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2021-12-22 13:50:21,136 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-22 13:50:21,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2021-12-22 13:50:21,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2021-12-22 13:50:21,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:21,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2021-12-22 13:50:21,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,139 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,139 INFO L186 Difference]: Start difference. First operand has 174 places, 222 transitions, 3136 flow. Second operand 6 states and 426 transitions. [2021-12-22 13:50:21,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 247 transitions, 3702 flow [2021-12-22 13:50:21,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 247 transitions, 3679 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-22 13:50:21,171 INFO L242 Difference]: Finished difference. Result has 180 places, 221 transitions, 3284 flow [2021-12-22 13:50:21,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3284, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2021-12-22 13:50:21,172 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2021-12-22 13:50:21,172 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 3284 flow [2021-12-22 13:50:21,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:21,173 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] [2021-12-22 13:50:21,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:21,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:21,387 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792189, now seen corresponding path program 5 times [2021-12-22 13:50:21,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497592286] [2021-12-22 13:50:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:21,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:21,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497592286] [2021-12-22 13:50:21,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497592286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:21,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017808408] [2021-12-22 13:50:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:21,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:21,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:21,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:21,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 3284 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:21,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:21,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:21,586 INFO L129 PetriNetUnfolder]: 225/707 cut-off events. [2021-12-22 13:50:21,586 INFO L130 PetriNetUnfolder]: For 10579/10581 co-relation queries the response was YES. [2021-12-22 13:50:21,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 707 events. 225/707 cut-off events. For 10579/10581 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4064 event pairs, 60 based on Foata normal form. 3/701 useless extension candidates. Maximal degree in co-relation 3742. Up to 195 conditions per place. [2021-12-22 13:50:21,593 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2021-12-22 13:50:21,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 238 transitions, 3723 flow [2021-12-22 13:50:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:50:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:50:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-22 13:50:21,595 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-22 13:50:21,595 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-22 13:50:21,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-22 13:50:21,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:21,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-22 13:50:21,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,597 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,598 INFO L186 Difference]: Start difference. First operand has 180 places, 221 transitions, 3284 flow. Second operand 7 states and 483 transitions. [2021-12-22 13:50:21,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 238 transitions, 3723 flow [2021-12-22 13:50:21,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 238 transitions, 3705 flow, removed 9 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:21,628 INFO L242 Difference]: Finished difference. Result has 187 places, 216 transitions, 3188 flow [2021-12-22 13:50:21,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3188, PETRI_PLACES=187, PETRI_TRANSITIONS=216} [2021-12-22 13:50:21,629 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 110 predicate places. [2021-12-22 13:50:21,629 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 216 transitions, 3188 flow [2021-12-22 13:50:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:21,630 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] [2021-12-22 13:50:21,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 13:50:21,631 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1061904615, now seen corresponding path program 6 times [2021-12-22 13:50:21,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976909254] [2021-12-22 13:50:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:21,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:21,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:21,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976909254] [2021-12-22 13:50:21,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976909254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:21,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:21,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:21,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583360551] [2021-12-22 13:50:21,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:21,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:21,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:21,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:21,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 216 transitions, 3188 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:21,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:21,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:21,813 INFO L129 PetriNetUnfolder]: 213/648 cut-off events. [2021-12-22 13:50:21,813 INFO L130 PetriNetUnfolder]: For 10212/10214 co-relation queries the response was YES. [2021-12-22 13:50:21,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3550 conditions, 648 events. 213/648 cut-off events. For 10212/10214 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3547 event pairs, 52 based on Foata normal form. 2/641 useless extension candidates. Maximal degree in co-relation 3503. Up to 195 conditions per place. [2021-12-22 13:50:21,820 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2021-12-22 13:50:21,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 224 transitions, 3456 flow [2021-12-22 13:50:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2021-12-22 13:50:21,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2021-12-22 13:50:21,822 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2021-12-22 13:50:21,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2021-12-22 13:50:21,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:21,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2021-12-22 13:50:21,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,824 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,824 INFO L186 Difference]: Start difference. First operand has 187 places, 216 transitions, 3188 flow. Second operand 8 states and 550 transitions. [2021-12-22 13:50:21,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 224 transitions, 3456 flow [2021-12-22 13:50:21,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 3370 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-12-22 13:50:21,854 INFO L242 Difference]: Finished difference. Result has 186 places, 202 transitions, 2978 flow [2021-12-22 13:50:21,854 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2021-12-22 13:50:21,854 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2021-12-22 13:50:21,854 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 2978 flow [2021-12-22 13:50:21,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:21,855 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] [2021-12-22 13:50:21,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 13:50:21,855 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1418986181, now seen corresponding path program 6 times [2021-12-22 13:50:21,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:21,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065963362] [2021-12-22 13:50:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:21,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:21,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:21,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065963362] [2021-12-22 13:50:21,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065963362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:21,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:21,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:21,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941473722] [2021-12-22 13:50:21,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:21,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:21,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:21,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-22 13:50:21,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 2978 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:21,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:21,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-22 13:50:21,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:22,021 INFO L129 PetriNetUnfolder]: 196/570 cut-off events. [2021-12-22 13:50:22,021 INFO L130 PetriNetUnfolder]: For 9515/9517 co-relation queries the response was YES. [2021-12-22 13:50:22,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 570 events. 196/570 cut-off events. For 9515/9517 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2895 event pairs, 39 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3225. Up to 190 conditions per place. [2021-12-22 13:50:22,027 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2021-12-22 13:50:22,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 206 transitions, 3168 flow [2021-12-22 13:50:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:50:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:50:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2021-12-22 13:50:22,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2021-12-22 13:50:22,029 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2021-12-22 13:50:22,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2021-12-22 13:50:22,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:22,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2021-12-22 13:50:22,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:22,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:22,031 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:22,031 INFO L186 Difference]: Start difference. First operand has 186 places, 202 transitions, 2978 flow. Second operand 7 states and 480 transitions. [2021-12-22 13:50:22,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 206 transitions, 3168 flow [2021-12-22 13:50:22,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 206 transitions, 3058 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-12-22 13:50:22,057 INFO L242 Difference]: Finished difference. Result has 176 places, 188 transitions, 2729 flow [2021-12-22 13:50:22,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2729, PETRI_PLACES=176, PETRI_TRANSITIONS=188} [2021-12-22 13:50:22,058 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2021-12-22 13:50:22,058 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 188 transitions, 2729 flow [2021-12-22 13:50:22,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:22,059 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:22,059 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] [2021-12-22 13:50:22,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 13:50:22,059 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1114847643, now seen corresponding path program 1 times [2021-12-22 13:50:22,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:22,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286995288] [2021-12-22 13:50:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:22,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:22,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286995288] [2021-12-22 13:50:22,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286995288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544348721] [2021-12-22 13:50:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:22,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:22,216 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) [2021-12-22 13:50:22,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:50:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:50:22,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:22,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:23,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544348721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:23,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:23,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-22 13:50:23,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336316771] [2021-12-22 13:50:23,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:23,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:50:23,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:50:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:50:23,346 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:23,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 188 transitions, 2729 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:23,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:23,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:23,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:32,990 INFO L129 PetriNetUnfolder]: 972/2298 cut-off events. [2021-12-22 13:50:32,990 INFO L130 PetriNetUnfolder]: For 36390/36390 co-relation queries the response was YES. [2021-12-22 13:50:33,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13560 conditions, 2298 events. 972/2298 cut-off events. For 36390/36390 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15728 event pairs, 34 based on Foata normal form. 3/2289 useless extension candidates. Maximal degree in co-relation 13516. Up to 363 conditions per place. [2021-12-22 13:50:33,016 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 856 changer transitions 17/1159 dead transitions. [2021-12-22 13:50:33,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1159 transitions, 17967 flow [2021-12-22 13:50:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-12-22 13:50:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-12-22 13:50:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2021-12-22 13:50:33,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2021-12-22 13:50:33,028 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2021-12-22 13:50:33,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2021-12-22 13:50:33,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:33,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2021-12-22 13:50:33,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:33,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:33,071 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:33,071 INFO L186 Difference]: Start difference. First operand has 176 places, 188 transitions, 2729 flow. Second operand 224 states and 11784 transitions. [2021-12-22 13:50:33,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1159 transitions, 17967 flow [2021-12-22 13:50:33,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1159 transitions, 17323 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:33,157 INFO L242 Difference]: Finished difference. Result has 446 places, 990 transitions, 16263 flow [2021-12-22 13:50:33,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=16263, PETRI_PLACES=446, PETRI_TRANSITIONS=990} [2021-12-22 13:50:33,158 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 369 predicate places. [2021-12-22 13:50:33,158 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 990 transitions, 16263 flow [2021-12-22 13:50:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:33,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:33,159 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] [2021-12-22 13:50:33,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:33,372 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,SelfDestructingSolverStorable33 [2021-12-22 13:50:33,372 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -495718643, now seen corresponding path program 2 times [2021-12-22 13:50:33,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:33,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181424674] [2021-12-22 13:50:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:33,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:33,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181424674] [2021-12-22 13:50:33,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181424674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862076880] [2021-12-22 13:50:33,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:50:33,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:33,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:33,543 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) [2021-12-22 13:50:33,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:50:33,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:50:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:50:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:34,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862076880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:34,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:34,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-22 13:50:34,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996439227] [2021-12-22 13:50:34,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:34,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:50:34,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:50:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:50:34,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:34,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 990 transitions, 16263 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:34,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:34,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:34,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:37,588 INFO L129 PetriNetUnfolder]: 1106/2980 cut-off events. [2021-12-22 13:50:37,588 INFO L130 PetriNetUnfolder]: For 138056/138056 co-relation queries the response was YES. [2021-12-22 13:50:37,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24655 conditions, 2980 events. 1106/2980 cut-off events. For 138056/138056 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24059 event pairs, 48 based on Foata normal form. 1/2968 useless extension candidates. Maximal degree in co-relation 24549. Up to 439 conditions per place. [2021-12-22 13:50:37,632 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 763 changer transitions 45/1207 dead transitions. [2021-12-22 13:50:37,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1207 transitions, 23367 flow [2021-12-22 13:50:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-22 13:50:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-22 13:50:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2021-12-22 13:50:37,637 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2021-12-22 13:50:37,637 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2021-12-22 13:50:37,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2021-12-22 13:50:37,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:37,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2021-12-22 13:50:37,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:37,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:37,694 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:37,694 INFO L186 Difference]: Start difference. First operand has 446 places, 990 transitions, 16263 flow. Second operand 64 states and 3489 transitions. [2021-12-22 13:50:37,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1207 transitions, 23367 flow [2021-12-22 13:50:38,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1207 transitions, 21916 flow, removed 479 selfloop flow, removed 13 redundant places. [2021-12-22 13:50:38,142 INFO L242 Difference]: Finished difference. Result has 508 places, 1036 transitions, 17767 flow [2021-12-22 13:50:38,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15031, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17767, PETRI_PLACES=508, PETRI_TRANSITIONS=1036} [2021-12-22 13:50:38,144 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 431 predicate places. [2021-12-22 13:50:38,144 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 1036 transitions, 17767 flow [2021-12-22 13:50:38,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:38,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:38,145 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] [2021-12-22 13:50:38,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:38,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:38,351 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -234836121, now seen corresponding path program 3 times [2021-12-22 13:50:38,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:38,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300664059] [2021-12-22 13:50:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:38,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:38,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:38,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300664059] [2021-12-22 13:50:38,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300664059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:38,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997093114] [2021-12-22 13:50:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:50:38,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:38,496 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) [2021-12-22 13:50:38,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:50:38,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:50:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:50:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:39,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997093114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:39,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:39,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-22 13:50:39,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690413657] [2021-12-22 13:50:39,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:39,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:50:39,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:50:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:50:39,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:39,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1036 transitions, 17767 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:39,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:39,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:39,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:42,174 INFO L129 PetriNetUnfolder]: 1087/2970 cut-off events. [2021-12-22 13:50:42,174 INFO L130 PetriNetUnfolder]: For 157922/157922 co-relation queries the response was YES. [2021-12-22 13:50:42,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25855 conditions, 2970 events. 1087/2970 cut-off events. For 157922/157922 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24237 event pairs, 59 based on Foata normal form. 2/2946 useless extension candidates. Maximal degree in co-relation 25738. Up to 415 conditions per place. [2021-12-22 13:50:42,221 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 775 changer transitions 31/1184 dead transitions. [2021-12-22 13:50:42,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1184 transitions, 23647 flow [2021-12-22 13:50:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-22 13:50:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-22 13:50:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2021-12-22 13:50:42,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2021-12-22 13:50:42,226 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2021-12-22 13:50:42,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2021-12-22 13:50:42,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:42,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2021-12-22 13:50:42,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,237 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,237 INFO L186 Difference]: Start difference. First operand has 508 places, 1036 transitions, 17767 flow. Second operand 66 states and 3577 transitions. [2021-12-22 13:50:42,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1184 transitions, 23647 flow [2021-12-22 13:50:42,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1184 transitions, 21875 flow, removed 167 selfloop flow, removed 43 redundant places. [2021-12-22 13:50:42,732 INFO L242 Difference]: Finished difference. Result has 538 places, 1053 transitions, 18288 flow [2021-12-22 13:50:42,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16108, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=18288, PETRI_PLACES=538, PETRI_TRANSITIONS=1053} [2021-12-22 13:50:42,734 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 461 predicate places. [2021-12-22 13:50:42,734 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 1053 transitions, 18288 flow [2021-12-22 13:50:42,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,734 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:42,735 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] [2021-12-22 13:50:42,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:42,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:42,941 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:42,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2020348661, now seen corresponding path program 4 times [2021-12-22 13:50:42,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:42,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924303676] [2021-12-22 13:50:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:42,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:43,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924303676] [2021-12-22 13:50:43,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924303676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041781163] [2021-12-22 13:50:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:50:43,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:43,108 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) [2021-12-22 13:50:43,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:50:43,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:50:43,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 13:50:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:43,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041781163] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:44,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:44,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-22 13:50:44,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655502561] [2021-12-22 13:50:44,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:44,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:50:44,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:50:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:50:44,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:44,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1053 transitions, 18288 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:44,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:44,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:44,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:45,852 INFO L129 PetriNetUnfolder]: 1083/3026 cut-off events. [2021-12-22 13:50:45,852 INFO L130 PetriNetUnfolder]: For 170688/170688 co-relation queries the response was YES. [2021-12-22 13:50:45,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26557 conditions, 3026 events. 1083/3026 cut-off events. For 170688/170688 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 25126 event pairs, 97 based on Foata normal form. 3/3000 useless extension candidates. Maximal degree in co-relation 26432. Up to 461 conditions per place. [2021-12-22 13:50:45,898 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 462 changer transitions 19/1174 dead transitions. [2021-12-22 13:50:45,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1174 transitions, 23596 flow [2021-12-22 13:50:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 13:50:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-22 13:50:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2021-12-22 13:50:45,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2021-12-22 13:50:45,901 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2021-12-22 13:50:45,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2021-12-22 13:50:45,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:45,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2021-12-22 13:50:45,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.78378378378378) internal successors, (2064), 37 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,907 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,907 INFO L186 Difference]: Start difference. First operand has 538 places, 1053 transitions, 18288 flow. Second operand 37 states and 2064 transitions. [2021-12-22 13:50:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1174 transitions, 23596 flow [2021-12-22 13:50:46,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1174 transitions, 21855 flow, removed 134 selfloop flow, removed 52 redundant places. [2021-12-22 13:50:46,509 INFO L242 Difference]: Finished difference. Result has 519 places, 1068 transitions, 17937 flow [2021-12-22 13:50:46,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16677, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17937, PETRI_PLACES=519, PETRI_TRANSITIONS=1068} [2021-12-22 13:50:46,510 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 442 predicate places. [2021-12-22 13:50:46,510 INFO L470 AbstractCegarLoop]: Abstraction has has 519 places, 1068 transitions, 17937 flow [2021-12-22 13:50:46,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:46,511 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] [2021-12-22 13:50:46,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:46,727 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,SelfDestructingSolverStorable36 [2021-12-22 13:50:46,728 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash 313019791, now seen corresponding path program 5 times [2021-12-22 13:50:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637168455] [2021-12-22 13:50:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:46,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:46,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:46,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637168455] [2021-12-22 13:50:46,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637168455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:46,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146767592] [2021-12-22 13:50:46,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:50:46,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:46,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:46,889 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) [2021-12-22 13:50:46,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:50:46,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:50:46,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:46,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 13:50:46,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:47,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:47,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146767592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:47,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:47,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-22 13:50:47,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479406577] [2021-12-22 13:50:47,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:47,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:50:47,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:50:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:50:47,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:47,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1068 transitions, 17937 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:47,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:47,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:49,564 INFO L129 PetriNetUnfolder]: 1141/3137 cut-off events. [2021-12-22 13:50:49,565 INFO L130 PetriNetUnfolder]: For 168086/168086 co-relation queries the response was YES. [2021-12-22 13:50:49,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27302 conditions, 3137 events. 1141/3137 cut-off events. For 168086/168086 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26394 event pairs, 74 based on Foata normal form. 2/3095 useless extension candidates. Maximal degree in co-relation 27179. Up to 620 conditions per place. [2021-12-22 13:50:49,630 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 904 changer transitions 21/1280 dead transitions. [2021-12-22 13:50:49,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1280 transitions, 24701 flow [2021-12-22 13:50:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-22 13:50:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-22 13:50:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2021-12-22 13:50:49,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2021-12-22 13:50:49,633 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2021-12-22 13:50:49,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2021-12-22 13:50:49,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:49,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2021-12-22 13:50:49,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.22222222222222) internal successors, (2440), 45 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,640 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,640 INFO L186 Difference]: Start difference. First operand has 519 places, 1068 transitions, 17937 flow. Second operand 45 states and 2440 transitions. [2021-12-22 13:50:49,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1280 transitions, 24701 flow [2021-12-22 13:50:50,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1280 transitions, 23870 flow, removed 48 selfloop flow, removed 21 redundant places. [2021-12-22 13:50:50,366 INFO L242 Difference]: Finished difference. Result has 558 places, 1181 transitions, 21851 flow [2021-12-22 13:50:50,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=17162, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21851, PETRI_PLACES=558, PETRI_TRANSITIONS=1181} [2021-12-22 13:50:50,367 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 481 predicate places. [2021-12-22 13:50:50,367 INFO L470 AbstractCegarLoop]: Abstraction has has 558 places, 1181 transitions, 21851 flow [2021-12-22 13:50:50,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:50,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:50,368 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] [2021-12-22 13:50:50,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:50,568 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,SelfDestructingSolverStorable37 [2021-12-22 13:50:50,568 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash 58562409, now seen corresponding path program 6 times [2021-12-22 13:50:50,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430519465] [2021-12-22 13:50:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:50,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:50,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430519465] [2021-12-22 13:50:50,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430519465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582283189] [2021-12-22 13:50:50,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:50:50,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:50,735 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) [2021-12-22 13:50:50,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:50:50,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-22 13:50:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:50:50,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:51,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:51,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582283189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:51,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:51,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-22 13:50:51,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697767151] [2021-12-22 13:50:51,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:51,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:50:51,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:50:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:50:51,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:51,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1181 transitions, 21851 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:51,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:51,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:51,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:54,401 INFO L129 PetriNetUnfolder]: 1186/3312 cut-off events. [2021-12-22 13:50:54,402 INFO L130 PetriNetUnfolder]: For 192059/192059 co-relation queries the response was YES. [2021-12-22 13:50:54,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30627 conditions, 3312 events. 1186/3312 cut-off events. For 192059/192059 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27895 event pairs, 69 based on Foata normal form. 1/3283 useless extension candidates. Maximal degree in co-relation 30489. Up to 445 conditions per place. [2021-12-22 13:50:54,570 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 853 changer transitions 50/1389 dead transitions. [2021-12-22 13:50:54,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1389 transitions, 30375 flow [2021-12-22 13:50:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-22 13:50:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-22 13:50:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2021-12-22 13:50:54,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2021-12-22 13:50:54,585 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2021-12-22 13:50:54,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2021-12-22 13:50:54,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:54,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2021-12-22 13:50:54,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.90163934426229) internal successors, (3349), 61 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:54,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:54,594 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:54,594 INFO L186 Difference]: Start difference. First operand has 558 places, 1181 transitions, 21851 flow. Second operand 61 states and 3349 transitions. [2021-12-22 13:50:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1389 transitions, 30375 flow [2021-12-22 13:50:55,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1389 transitions, 29834 flow, removed 176 selfloop flow, removed 15 redundant places. [2021-12-22 13:50:55,404 INFO L242 Difference]: Finished difference. Result has 617 places, 1215 transitions, 24467 flow [2021-12-22 13:50:55,405 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21528, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=24467, PETRI_PLACES=617, PETRI_TRANSITIONS=1215} [2021-12-22 13:50:55,406 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 540 predicate places. [2021-12-22 13:50:55,407 INFO L470 AbstractCegarLoop]: Abstraction has has 617 places, 1215 transitions, 24467 flow [2021-12-22 13:50:55,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:55,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:55,407 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] [2021-12-22 13:50:55,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:55,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-22 13:50:55,623 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -278718071, now seen corresponding path program 7 times [2021-12-22 13:50:55,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:55,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351731793] [2021-12-22 13:50:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:55,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:55,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351731793] [2021-12-22 13:50:55,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351731793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856702884] [2021-12-22 13:50:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:50:55,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:55,768 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:55,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:50:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:50:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:56,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856702884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:56,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:56,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-22 13:50:56,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486295023] [2021-12-22 13:50:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:56,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:50:56,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:50:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:50:56,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-22 13:50:56,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1215 transitions, 24467 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:56,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:56,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-22 13:50:56,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:59,470 INFO L129 PetriNetUnfolder]: 1328/3678 cut-off events. [2021-12-22 13:50:59,470 INFO L130 PetriNetUnfolder]: For 218700/218700 co-relation queries the response was YES. [2021-12-22 13:50:59,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35430 conditions, 3678 events. 1328/3678 cut-off events. For 218700/218700 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 31496 event pairs, 77 based on Foata normal form. 4/3637 useless extension candidates. Maximal degree in co-relation 35277. Up to 608 conditions per place. [2021-12-22 13:50:59,534 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 283 selfloop transitions, 1254 changer transitions 19/1595 dead transitions. [2021-12-22 13:50:59,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1595 transitions, 35158 flow [2021-12-22 13:50:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-22 13:50:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-22 13:50:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2021-12-22 13:50:59,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2021-12-22 13:50:59,589 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2021-12-22 13:50:59,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2021-12-22 13:50:59,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:59,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2021-12-22 13:50:59,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:59,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:59,596 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:59,596 INFO L186 Difference]: Start difference. First operand has 617 places, 1215 transitions, 24467 flow. Second operand 60 states and 3187 transitions. [2021-12-22 13:50:59,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1595 transitions, 35158 flow [2021-12-22 13:51:00,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1595 transitions, 34016 flow, removed 47 selfloop flow, removed 37 redundant places. [2021-12-22 13:51:00,514 INFO L242 Difference]: Finished difference. Result has 645 places, 1519 transitions, 33649 flow [2021-12-22 13:51:00,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23623, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=33649, PETRI_PLACES=645, PETRI_TRANSITIONS=1519} [2021-12-22 13:51:00,515 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 568 predicate places. [2021-12-22 13:51:00,515 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 1519 transitions, 33649 flow [2021-12-22 13:51:00,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:00,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:00,516 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] [2021-12-22 13:51:00,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:00,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-22 13:51:00,717 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1685857435, now seen corresponding path program 8 times [2021-12-22 13:51:00,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:00,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886954938] [2021-12-22 13:51:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:00,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat