./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.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 368647bf8c8fe53592ceb4314bbebffd0b8c087a8115d4714b27d4e56ab0a9cf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:13:11,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:13:11,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:13:11,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:13:11,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:13:11,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:13:11,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:13:11,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:13:11,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:13:11,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:13:11,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:13:11,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:13:11,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:13:11,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:13:11,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:13:11,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:13:11,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:13:11,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:13:11,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:13:11,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:13:11,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:13:11,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:13:11,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:13:11,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:13:11,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:13:11,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:13:11,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:13:11,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:13:11,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:13:11,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:13:11,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:13:11,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:13:11,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:13:11,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:13:11,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:13:11,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:13:11,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:13:11,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:13:11,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:13:11,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:13:11,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:13:11,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:13:11,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:13:11,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:13:11,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:13:11,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:13:11,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:13:11,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:13:11,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:13:11,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:13:11,454 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:13:11,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:13:11,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:13:11,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:13:11,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:13:11,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:13:11,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:13:11,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:13:11,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:13:11,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:13:11,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:13:11,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:13:11,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:13:11,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:13:11,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:13:11,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:13:11,463 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:13:11,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:13:11,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:13:11,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 368647bf8c8fe53592ceb4314bbebffd0b8c087a8115d4714b27d4e56ab0a9cf [2021-12-28 01:13:11,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:13:11,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:13:11,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:13:11,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:13:11,741 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:13:11,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2021-12-28 01:13:11,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90a22ec6/057938c4b5bb4c0a81283fb557b30279/FLAGdc8917ac8 [2021-12-28 01:13:12,129 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:13:12,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2021-12-28 01:13:12,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90a22ec6/057938c4b5bb4c0a81283fb557b30279/FLAGdc8917ac8 [2021-12-28 01:13:12,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90a22ec6/057938c4b5bb4c0a81283fb557b30279 [2021-12-28 01:13:12,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:13:12,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:13:12,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:13:12,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:13:12,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:13:12,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d15e67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12, skipping insertion in model container [2021-12-28 01:13:12,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:13:12,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:13:12,714 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/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c[14371,14384] [2021-12-28 01:13:12,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:13:12,730 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:13:12,824 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/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c[14371,14384] [2021-12-28 01:13:12,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:13:12,843 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:13:12,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12 WrapperNode [2021-12-28 01:13:12,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:13:12,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:13:12,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:13:12,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:13:12,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,887 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 479 [2021-12-28 01:13:12,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:13:12,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:13:12,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:13:12,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:13:12,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:13:12,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:13:12,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:13:12,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:13:12,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (1/1) ... [2021-12-28 01:13:12,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:13:12,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:13:12,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:13:12,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:13:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:13:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:13:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:13:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:13:13,089 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:13:13,091 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:13:13,518 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:13:13,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:13:13,524 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:13:13,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:13:13 BoogieIcfgContainer [2021-12-28 01:13:13,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:13:13,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:13:13,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:13:13,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:13:13,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:13:12" (1/3) ... [2021-12-28 01:13:13,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5623e7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:13:13, skipping insertion in model container [2021-12-28 01:13:13,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:12" (2/3) ... [2021-12-28 01:13:13,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5623e7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:13:13, skipping insertion in model container [2021-12-28 01:13:13,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:13:13" (3/3) ... [2021-12-28 01:13:13,531 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2021-12-28 01:13:13,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:13:13,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:13:13,563 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:13:13,567 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:13:13,568 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:13:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 01:13:13,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:13,584 INFO L514 BasicCegarLoop]: 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] [2021-12-28 01:13:13,584 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2021-12-28 01:13:13,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:13,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120723256] [2021-12-28 01:13:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:13,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:13,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:13,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120723256] [2021-12-28 01:13:13,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120723256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:13,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:13,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:13:13,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634178529] [2021-12-28 01:13:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:13,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:13:13,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:13,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:13:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:13:13,816 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:13,848 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2021-12-28 01:13:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:13:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-28 01:13:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:13,860 INFO L225 Difference]: With dead ends: 227 [2021-12-28 01:13:13,860 INFO L226 Difference]: Without dead ends: 139 [2021-12-28 01:13:13,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:13:13,866 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:13,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-28 01:13:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-28 01:13:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7463768115942029) internal successors, (241), 138 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2021-12-28 01:13:13,909 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2021-12-28 01:13:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:13,910 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2021-12-28 01:13:13,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2021-12-28 01:13:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 01:13:13,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:13,915 INFO L514 BasicCegarLoop]: 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] [2021-12-28 01:13:13,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:13:13,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2021-12-28 01:13:13,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:13,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188654854] [2021-12-28 01:13:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:13,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188654854] [2021-12-28 01:13:14,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188654854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:14,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481356391] [2021-12-28 01:13:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:14,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:14,029 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,106 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2021-12-28 01:13:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-28 01:13:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,114 INFO L225 Difference]: With dead ends: 222 [2021-12-28 01:13:14,114 INFO L226 Difference]: Without dead ends: 139 [2021-12-28 01:13:14,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:13:14,118 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 3 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 923 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-28 01:13:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-28 01:13:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2021-12-28 01:13:14,136 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2021-12-28 01:13:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:14,137 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2021-12-28 01:13:14,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2021-12-28 01:13:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 01:13:14,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:14,140 INFO L514 BasicCegarLoop]: 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] [2021-12-28 01:13:14,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:13:14,142 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:14,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2021-12-28 01:13:14,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:14,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671077339] [2021-12-28 01:13:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:14,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671077339] [2021-12-28 01:13:14,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671077339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:14,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506009415] [2021-12-28 01:13:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,229 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,263 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2021-12-28 01:13:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-28 01:13:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,265 INFO L225 Difference]: With dead ends: 287 [2021-12-28 01:13:14,265 INFO L226 Difference]: Without dead ends: 208 [2021-12-28 01:13:14,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,270 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 374 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-28 01:13:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-12-28 01:13:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 205 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2021-12-28 01:13:14,291 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2021-12-28 01:13:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:14,291 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2021-12-28 01:13:14,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2021-12-28 01:13:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:13:14,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:14,293 INFO L514 BasicCegarLoop]: 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] [2021-12-28 01:13:14,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:13:14,293 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2021-12-28 01:13:14,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:14,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51978303] [2021-12-28 01:13:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:14,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51978303] [2021-12-28 01:13:14,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51978303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:14,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791555924] [2021-12-28 01:13:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:14,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,358 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,382 INFO L93 Difference]: Finished difference Result 482 states and 776 transitions. [2021-12-28 01:13:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 01:13:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,385 INFO L225 Difference]: With dead ends: 482 [2021-12-28 01:13:14,385 INFO L226 Difference]: Without dead ends: 336 [2021-12-28 01:13:14,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,388 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 386 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-28 01:13:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2021-12-28 01:13:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.5945945945945945) internal successors, (531), 333 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 531 transitions. [2021-12-28 01:13:14,397 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 531 transitions. Word has length 68 [2021-12-28 01:13:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:14,398 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 531 transitions. [2021-12-28 01:13:14,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 531 transitions. [2021-12-28 01:13:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-28 01:13:14,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:14,399 INFO L514 BasicCegarLoop]: 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] [2021-12-28 01:13:14,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:13:14,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2021-12-28 01:13:14,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675335410] [2021-12-28 01:13:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:14,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675335410] [2021-12-28 01:13:14,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675335410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:14,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179053496] [2021-12-28 01:13:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:14,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,457 INFO L87 Difference]: Start difference. First operand 334 states and 531 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,472 INFO L93 Difference]: Finished difference Result 850 states and 1381 transitions. [2021-12-28 01:13:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-28 01:13:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,474 INFO L225 Difference]: With dead ends: 850 [2021-12-28 01:13:14,474 INFO L226 Difference]: Without dead ends: 576 [2021-12-28 01:13:14,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,475 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 103 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-12-28 01:13:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2021-12-28 01:13:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.6108202443280977) internal successors, (923), 573 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 923 transitions. [2021-12-28 01:13:14,494 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 923 transitions. Word has length 70 [2021-12-28 01:13:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:14,494 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 923 transitions. [2021-12-28 01:13:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 923 transitions. [2021-12-28 01:13:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:13:14,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:14,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:14,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:13:14,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2021-12-28 01:13:14,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301509216] [2021-12-28 01:13:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:14,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301509216] [2021-12-28 01:13:14,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301509216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:14,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621424668] [2021-12-28 01:13:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:14,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:14,559 INFO L87 Difference]: Start difference. First operand 574 states and 923 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,679 INFO L93 Difference]: Finished difference Result 2450 states and 4045 transitions. [2021-12-28 01:13:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:13:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-28 01:13:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,687 INFO L225 Difference]: With dead ends: 2450 [2021-12-28 01:13:14,688 INFO L226 Difference]: Without dead ends: 1936 [2021-12-28 01:13:14,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:13:14,689 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 778 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1306 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:13:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-12-28 01:13:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1023. [2021-12-28 01:13:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.6252446183953033) internal successors, (1661), 1022 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1661 transitions. [2021-12-28 01:13:14,732 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1661 transitions. Word has length 72 [2021-12-28 01:13:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:14,732 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1661 transitions. [2021-12-28 01:13:14,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1661 transitions. [2021-12-28 01:13:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 01:13:14,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:14,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:14,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:13:14,734 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2021-12-28 01:13:14,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434685774] [2021-12-28 01:13:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:14,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434685774] [2021-12-28 01:13:14,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434685774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:14,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800561363] [2021-12-28 01:13:14,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:14,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:14,782 INFO L87 Difference]: Start difference. First operand 1023 states and 1661 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,869 INFO L93 Difference]: Finished difference Result 2972 states and 4898 transitions. [2021-12-28 01:13:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:13:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-28 01:13:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,875 INFO L225 Difference]: With dead ends: 2972 [2021-12-28 01:13:14,875 INFO L226 Difference]: Without dead ends: 2009 [2021-12-28 01:13:14,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:14,877 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 385 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 689 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-12-28 01:13:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1507. [2021-12-28 01:13:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 1.6328021248339974) internal successors, (2459), 1506 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2459 transitions. [2021-12-28 01:13:14,914 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2459 transitions. Word has length 73 [2021-12-28 01:13:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:14,914 INFO L470 AbstractCegarLoop]: Abstraction has 1507 states and 2459 transitions. [2021-12-28 01:13:14,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2459 transitions. [2021-12-28 01:13:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 01:13:14,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:14,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:13:14,916 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2021-12-28 01:13:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764670530] [2021-12-28 01:13:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:14,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:14,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764670530] [2021-12-28 01:13:14,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764670530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:14,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:14,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:14,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232270829] [2021-12-28 01:13:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:14,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:14,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:14,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:14,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,945 INFO L87 Difference]: Start difference. First operand 1507 states and 2459 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:14,990 INFO L93 Difference]: Finished difference Result 2973 states and 4868 transitions. [2021-12-28 01:13:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-28 01:13:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:14,996 INFO L225 Difference]: With dead ends: 2973 [2021-12-28 01:13:14,996 INFO L226 Difference]: Without dead ends: 2147 [2021-12-28 01:13:14,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:14,997 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 110 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:14,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 456 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-12-28 01:13:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2145. [2021-12-28 01:13:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 1.625) internal successors, (3484), 2144 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3484 transitions. [2021-12-28 01:13:15,073 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3484 transitions. Word has length 74 [2021-12-28 01:13:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:15,076 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 3484 transitions. [2021-12-28 01:13:15,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3484 transitions. [2021-12-28 01:13:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 01:13:15,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:15,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:15,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:13:15,080 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2021-12-28 01:13:15,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:15,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438403362] [2021-12-28 01:13:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:15,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:15,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:15,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438403362] [2021-12-28 01:13:15,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438403362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:15,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:15,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:15,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408669641] [2021-12-28 01:13:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:15,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:15,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:15,146 INFO L87 Difference]: Start difference. First operand 2145 states and 3484 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:15,294 INFO L93 Difference]: Finished difference Result 6648 states and 10865 transitions. [2021-12-28 01:13:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:13:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-28 01:13:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:15,306 INFO L225 Difference]: With dead ends: 6648 [2021-12-28 01:13:15,306 INFO L226 Difference]: Without dead ends: 4593 [2021-12-28 01:13:15,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:15,311 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 384 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:15,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 686 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-12-28 01:13:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3357. [2021-12-28 01:13:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3357 states, 3356 states have (on average 1.6215733015494636) internal successors, (5442), 3356 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 5442 transitions. [2021-12-28 01:13:15,439 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 5442 transitions. Word has length 74 [2021-12-28 01:13:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:15,440 INFO L470 AbstractCegarLoop]: Abstraction has 3357 states and 5442 transitions. [2021-12-28 01:13:15,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 5442 transitions. [2021-12-28 01:13:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 01:13:15,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:15,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:15,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:13:15,441 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2021-12-28 01:13:15,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:15,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052322318] [2021-12-28 01:13:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:15,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:15,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052322318] [2021-12-28 01:13:15,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052322318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:15,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:15,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:15,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345347551] [2021-12-28 01:13:15,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:15,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:15,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:15,475 INFO L87 Difference]: Start difference. First operand 3357 states and 5442 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:15,580 INFO L93 Difference]: Finished difference Result 6689 states and 10862 transitions. [2021-12-28 01:13:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-28 01:13:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:15,610 INFO L225 Difference]: With dead ends: 6689 [2021-12-28 01:13:15,610 INFO L226 Difference]: Without dead ends: 4777 [2021-12-28 01:13:15,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:15,612 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 104 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:15,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 439 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-12-28 01:13:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2021-12-28 01:13:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 1.6108085462924173) internal successors, (7690), 4774 states have internal predecessors, (7690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7690 transitions. [2021-12-28 01:13:15,757 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7690 transitions. Word has length 74 [2021-12-28 01:13:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:15,757 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 7690 transitions. [2021-12-28 01:13:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7690 transitions. [2021-12-28 01:13:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 01:13:15,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:15,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:15,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:13:15,759 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2021-12-28 01:13:15,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:15,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024461895] [2021-12-28 01:13:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:15,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:15,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024461895] [2021-12-28 01:13:15,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024461895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:15,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:15,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:15,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248936989] [2021-12-28 01:13:15,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:15,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:15,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:15,792 INFO L87 Difference]: Start difference. First operand 4775 states and 7690 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:16,010 INFO L93 Difference]: Finished difference Result 10486 states and 17043 transitions. [2021-12-28 01:13:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-28 01:13:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:16,045 INFO L225 Difference]: With dead ends: 10486 [2021-12-28 01:13:16,046 INFO L226 Difference]: Without dead ends: 7079 [2021-12-28 01:13:16,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:16,053 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 116 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:16,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 479 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2021-12-28 01:13:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7077. [2021-12-28 01:13:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 1.6075466365178066) internal successors, (11375), 7076 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 11375 transitions. [2021-12-28 01:13:16,301 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 11375 transitions. Word has length 74 [2021-12-28 01:13:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:16,302 INFO L470 AbstractCegarLoop]: Abstraction has 7077 states and 11375 transitions. [2021-12-28 01:13:16,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 11375 transitions. [2021-12-28 01:13:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 01:13:16,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:16,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:13:16,303 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2021-12-28 01:13:16,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:16,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966613485] [2021-12-28 01:13:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:16,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:16,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:16,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966613485] [2021-12-28 01:13:16,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966613485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:16,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:16,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:16,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389780402] [2021-12-28 01:13:16,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:16,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:16,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:16,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:16,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:16,336 INFO L87 Difference]: Start difference. First operand 7077 states and 11375 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:16,758 INFO L93 Difference]: Finished difference Result 22184 states and 35744 transitions. [2021-12-28 01:13:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:13:16,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-28 01:13:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:16,787 INFO L225 Difference]: With dead ends: 22184 [2021-12-28 01:13:16,787 INFO L226 Difference]: Without dead ends: 15193 [2021-12-28 01:13:16,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:16,797 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 382 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:16,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 688 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2021-12-28 01:13:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 11092. [2021-12-28 01:13:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 1.5980524749797134) internal successors, (17724), 11091 states have internal predecessors, (17724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17724 transitions. [2021-12-28 01:13:17,300 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17724 transitions. Word has length 75 [2021-12-28 01:13:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:17,301 INFO L470 AbstractCegarLoop]: Abstraction has 11092 states and 17724 transitions. [2021-12-28 01:13:17,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17724 transitions. [2021-12-28 01:13:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 01:13:17,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:17,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:17,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:13:17,302 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2021-12-28 01:13:17,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:17,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137258579] [2021-12-28 01:13:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:17,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:17,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137258579] [2021-12-28 01:13:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137258579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:17,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898332690] [2021-12-28 01:13:17,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:17,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:17,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:17,374 INFO L87 Difference]: Start difference. First operand 11092 states and 17724 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:17,686 INFO L93 Difference]: Finished difference Result 22100 states and 35333 transitions. [2021-12-28 01:13:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:17,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-28 01:13:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:17,705 INFO L225 Difference]: With dead ends: 22100 [2021-12-28 01:13:17,706 INFO L226 Difference]: Without dead ends: 11094 [2021-12-28 01:13:17,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:13:17,718 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 386 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:17,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 562 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11094 states. [2021-12-28 01:13:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11094 to 11092. [2021-12-28 01:13:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 1.5867820755567577) internal successors, (17599), 11091 states have internal predecessors, (17599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17599 transitions. [2021-12-28 01:13:18,059 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17599 transitions. Word has length 77 [2021-12-28 01:13:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 11092 states and 17599 transitions. [2021-12-28 01:13:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17599 transitions. [2021-12-28 01:13:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 01:13:18,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:18,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:18,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:13:18,062 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1222308264, now seen corresponding path program 1 times [2021-12-28 01:13:18,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:18,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158020211] [2021-12-28 01:13:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:18,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:18,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:18,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158020211] [2021-12-28 01:13:18,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158020211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:18,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:18,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952222371] [2021-12-28 01:13:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:18,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:18,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:18,162 INFO L87 Difference]: Start difference. First operand 11092 states and 17599 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:18,733 INFO L93 Difference]: Finished difference Result 31756 states and 50533 transitions. [2021-12-28 01:13:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:18,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-28 01:13:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:18,771 INFO L225 Difference]: With dead ends: 31756 [2021-12-28 01:13:18,771 INFO L226 Difference]: Without dead ends: 20750 [2021-12-28 01:13:18,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:13:18,783 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 178 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 750 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:13:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20750 states. [2021-12-28 01:13:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20750 to 20748. [2021-12-28 01:13:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20748 states, 20747 states have (on average 1.5742034993011038) internal successors, (32660), 20747 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20748 states to 20748 states and 32660 transitions. [2021-12-28 01:13:19,545 INFO L78 Accepts]: Start accepts. Automaton has 20748 states and 32660 transitions. Word has length 80 [2021-12-28 01:13:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:19,545 INFO L470 AbstractCegarLoop]: Abstraction has 20748 states and 32660 transitions. [2021-12-28 01:13:19,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20748 states and 32660 transitions. [2021-12-28 01:13:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:13:19,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:19,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:19,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:13:19,547 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 334573870, now seen corresponding path program 1 times [2021-12-28 01:13:19,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992222628] [2021-12-28 01:13:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:19,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:19,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992222628] [2021-12-28 01:13:19,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992222628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:19,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:19,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:19,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763756671] [2021-12-28 01:13:19,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:19,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:19,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:19,614 INFO L87 Difference]: Start difference. First operand 20748 states and 32660 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:20,663 INFO L93 Difference]: Finished difference Result 40559 states and 63106 transitions. [2021-12-28 01:13:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:13:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-28 01:13:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:20,742 INFO L225 Difference]: With dead ends: 40559 [2021-12-28 01:13:20,743 INFO L226 Difference]: Without dead ends: 40557 [2021-12-28 01:13:20,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:13:20,755 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 341 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:20,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 911 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40557 states. [2021-12-28 01:13:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40557 to 21834. [2021-12-28 01:13:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 1.5452296981633307) internal successors, (33737), 21833 states have internal predecessors, (33737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 33737 transitions. [2021-12-28 01:13:21,627 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 33737 transitions. Word has length 81 [2021-12-28 01:13:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:21,628 INFO L470 AbstractCegarLoop]: Abstraction has 21834 states and 33737 transitions. [2021-12-28 01:13:21,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 33737 transitions. [2021-12-28 01:13:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:13:21,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:21,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:21,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:13:21,631 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1678408875, now seen corresponding path program 1 times [2021-12-28 01:13:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655447895] [2021-12-28 01:13:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:21,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:13:21,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655447895] [2021-12-28 01:13:21,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655447895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:21,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:21,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:21,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449882872] [2021-12-28 01:13:21,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:21,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:21,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:21,683 INFO L87 Difference]: Start difference. First operand 21834 states and 33737 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:23,270 INFO L93 Difference]: Finished difference Result 53362 states and 82659 transitions. [2021-12-28 01:13:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-28 01:13:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:23,339 INFO L225 Difference]: With dead ends: 53362 [2021-12-28 01:13:23,340 INFO L226 Difference]: Without dead ends: 43020 [2021-12-28 01:13:23,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:13:23,356 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 488 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:23,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 907 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43020 states. [2021-12-28 01:13:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43020 to 33554. [2021-12-28 01:13:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33554 states, 33553 states have (on average 1.5432003099573808) internal successors, (51779), 33553 states have internal predecessors, (51779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33554 states to 33554 states and 51779 transitions. [2021-12-28 01:13:24,585 INFO L78 Accepts]: Start accepts. Automaton has 33554 states and 51779 transitions. Word has length 107 [2021-12-28 01:13:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 33554 states and 51779 transitions. [2021-12-28 01:13:24,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 33554 states and 51779 transitions. [2021-12-28 01:13:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:13:24,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:24,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:24,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:13:24,588 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash 333972341, now seen corresponding path program 1 times [2021-12-28 01:13:24,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:24,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984283891] [2021-12-28 01:13:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:24,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:13:24,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984283891] [2021-12-28 01:13:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984283891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:24,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:24,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:24,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998582575] [2021-12-28 01:13:24,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:24,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:24,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:24,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:24,629 INFO L87 Difference]: Start difference. First operand 33554 states and 51779 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:25,995 INFO L93 Difference]: Finished difference Result 57498 states and 89067 transitions. [2021-12-28 01:13:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-28 01:13:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:26,065 INFO L225 Difference]: With dead ends: 57498 [2021-12-28 01:13:26,065 INFO L226 Difference]: Without dead ends: 47156 [2021-12-28 01:13:26,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:13:26,092 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 496 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:26,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 896 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47156 states. [2021-12-28 01:13:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47156 to 45454. [2021-12-28 01:13:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45454 states, 45453 states have (on average 1.54333047323609) internal successors, (70149), 45453 states have internal predecessors, (70149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45454 states to 45454 states and 70149 transitions. [2021-12-28 01:13:27,999 INFO L78 Accepts]: Start accepts. Automaton has 45454 states and 70149 transitions. Word has length 107 [2021-12-28 01:13:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:27,999 INFO L470 AbstractCegarLoop]: Abstraction has 45454 states and 70149 transitions. [2021-12-28 01:13:27,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 45454 states and 70149 transitions. [2021-12-28 01:13:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:13:28,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:28,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:28,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:13:28,003 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1491363019, now seen corresponding path program 1 times [2021-12-28 01:13:28,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8041975] [2021-12-28 01:13:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:28,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:13:28,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:28,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8041975] [2021-12-28 01:13:28,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8041975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:28,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:28,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:28,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512655760] [2021-12-28 01:13:28,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:28,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:28,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:28,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:28,050 INFO L87 Difference]: Start difference. First operand 45454 states and 70149 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:29,893 INFO L93 Difference]: Finished difference Result 64542 states and 100125 transitions. [2021-12-28 01:13:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-28 01:13:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:29,985 INFO L225 Difference]: With dead ends: 64542 [2021-12-28 01:13:29,985 INFO L226 Difference]: Without dead ends: 53940 [2021-12-28 01:13:30,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:13:30,013 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 485 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:30,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 986 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53940 states. [2021-12-28 01:13:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53940 to 52238. [2021-12-28 01:13:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52238 states, 52237 states have (on average 1.5455902904071825) internal successors, (80737), 52237 states have internal predecessors, (80737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52238 states to 52238 states and 80737 transitions. [2021-12-28 01:13:32,227 INFO L78 Accepts]: Start accepts. Automaton has 52238 states and 80737 transitions. Word has length 107 [2021-12-28 01:13:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:32,227 INFO L470 AbstractCegarLoop]: Abstraction has 52238 states and 80737 transitions. [2021-12-28 01:13:32,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52238 states and 80737 transitions. [2021-12-28 01:13:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 01:13:32,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:32,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:32,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:13:32,232 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash -910445921, now seen corresponding path program 1 times [2021-12-28 01:13:32,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:32,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806855046] [2021-12-28 01:13:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:32,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:13:32,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:32,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806855046] [2021-12-28 01:13:32,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806855046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:32,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:32,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:32,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856262782] [2021-12-28 01:13:32,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:32,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:32,278 INFO L87 Difference]: Start difference. First operand 52238 states and 80737 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:34,582 INFO L93 Difference]: Finished difference Result 85241 states and 132386 transitions. [2021-12-28 01:13:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:13:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-28 01:13:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:34,685 INFO L225 Difference]: With dead ends: 85241 [2021-12-28 01:13:34,686 INFO L226 Difference]: Without dead ends: 67855 [2021-12-28 01:13:34,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:34,710 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 208 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:34,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 715 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67855 states. [2021-12-28 01:13:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67855 to 66155. [2021-12-28 01:13:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66155 states, 66154 states have (on average 1.5456510566254498) internal successors, (102251), 66154 states have internal predecessors, (102251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66155 states to 66155 states and 102251 transitions. [2021-12-28 01:13:37,210 INFO L78 Accepts]: Start accepts. Automaton has 66155 states and 102251 transitions. Word has length 108 [2021-12-28 01:13:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:37,210 INFO L470 AbstractCegarLoop]: Abstraction has 66155 states and 102251 transitions. [2021-12-28 01:13:37,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66155 states and 102251 transitions. [2021-12-28 01:13:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 01:13:37,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:37,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:37,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:13:37,213 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash -487744095, now seen corresponding path program 1 times [2021-12-28 01:13:37,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:37,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733217461] [2021-12-28 01:13:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:37,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:13:37,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733217461] [2021-12-28 01:13:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733217461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:37,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:37,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:37,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622201146] [2021-12-28 01:13:37,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:37,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:37,368 INFO L87 Difference]: Start difference. First operand 66155 states and 102251 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:41,092 INFO L93 Difference]: Finished difference Result 143009 states and 221699 transitions. [2021-12-28 01:13:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:41,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-28 01:13:41,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:41,285 INFO L225 Difference]: With dead ends: 143009 [2021-12-28 01:13:41,285 INFO L226 Difference]: Without dead ends: 111843 [2021-12-28 01:13:41,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:41,317 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 92 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:41,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111843 states.