./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 16:12:12,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 16:12:12,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 16:12:12,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 16:12:12,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 16:12:12,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 16:12:12,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 16:12:12,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 16:12:12,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 16:12:12,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 16:12:12,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 16:12:12,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 16:12:12,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 16:12:12,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 16:12:12,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 16:12:12,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 16:12:12,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 16:12:12,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 16:12:12,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 16:12:12,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 16:12:12,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 16:12:12,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 16:12:12,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 16:12:12,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 16:12:12,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 16:12:12,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 16:12:12,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 16:12:12,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 16:12:12,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 16:12:12,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 16:12:12,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 16:12:12,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 16:12:12,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 16:12:12,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 16:12:12,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 16:12:12,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 16:12:12,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 16:12:12,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 16:12:12,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 16:12:12,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 16:12:12,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 16:12:12,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 16:12:12,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 16:12:12,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 16:12:12,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 16:12:12,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 16:12:12,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 16:12:12,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 16:12:12,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 16:12:12,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 16:12:12,799 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 16:12:12,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 16:12:12,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 16:12:12,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 16:12:12,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 16:12:12,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 16:12:12,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 16:12:12,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 16:12:12,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 16:12:12,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 16:12:12,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 16:12:12,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 16:12:12,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 16:12:12,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 16:12:12,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 16:12:12,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 16:12:12,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:12:12,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 16:12:12,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 16:12:12,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 16:12:12,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 16:12:12,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 16:12:12,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 16:12:12,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 16:12:12,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 16:12:12,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 16:12:12,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 [2021-12-17 16:12:13,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 16:12:13,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 16:12:13,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 16:12:13,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 16:12:13,047 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 16:12:13,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-17 16:12:13,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59fdef9f2/d9328e9065214f68b78b02ec2d8ab32e/FLAGf9c60b0a4 [2021-12-17 16:12:13,452 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 16:12:13,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-17 16:12:13,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59fdef9f2/d9328e9065214f68b78b02ec2d8ab32e/FLAGf9c60b0a4 [2021-12-17 16:12:13,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59fdef9f2/d9328e9065214f68b78b02ec2d8ab32e [2021-12-17 16:12:13,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 16:12:13,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 16:12:13,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 16:12:13,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 16:12:13,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 16:12:13,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:12:13" (1/1) ... [2021-12-17 16:12:13,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b978691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:13, skipping insertion in model container [2021-12-17 16:12:13,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:12:13" (1/1) ... [2021-12-17 16:12:13,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 16:12:13,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 16:12:14,094 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-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-12-17 16:12:14,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:12:14,152 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 16:12:14,203 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-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-12-17 16:12:14,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:12:14,261 INFO L208 MainTranslator]: Completed translation [2021-12-17 16:12:14,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14 WrapperNode [2021-12-17 16:12:14,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 16:12:14,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 16:12:14,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 16:12:14,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 16:12:14,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,330 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 649 [2021-12-17 16:12:14,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 16:12:14,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 16:12:14,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 16:12:14,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 16:12:14,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 16:12:14,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 16:12:14,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 16:12:14,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 16:12:14,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (1/1) ... [2021-12-17 16:12:14,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:12:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:12:14,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 16:12:14,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 16:12:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 16:12:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 16:12:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 16:12:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 16:12:14,643 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 16:12:14,644 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 16:12:15,018 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 16:12:15,023 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 16:12:15,024 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 16:12:15,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:12:15 BoogieIcfgContainer [2021-12-17 16:12:15,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 16:12:15,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 16:12:15,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 16:12:15,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 16:12:15,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:12:13" (1/3) ... [2021-12-17 16:12:15,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daafda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:12:15, skipping insertion in model container [2021-12-17 16:12:15,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:14" (2/3) ... [2021-12-17 16:12:15,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daafda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:12:15, skipping insertion in model container [2021-12-17 16:12:15,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:12:15" (3/3) ... [2021-12-17 16:12:15,031 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-17 16:12:15,034 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 16:12:15,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 16:12:15,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 16:12:15,075 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 16:12:15,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 16:12:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 169 states have (on average 1.7218934911242603) internal successors, (291), 170 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 16:12:15,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:15,093 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] [2021-12-17 16:12:15,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash 965210613, now seen corresponding path program 1 times [2021-12-17 16:12:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:15,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719025303] [2021-12-17 16:12:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:15,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:15,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719025303] [2021-12-17 16:12:15,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719025303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:15,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:15,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:15,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081157091] [2021-12-17 16:12:15,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:15,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:15,424 INFO L87 Difference]: Start difference. First operand has 171 states, 169 states have (on average 1.7218934911242603) internal successors, (291), 170 states have internal predecessors, (291), 0 states have call successors, (0), 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 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:15,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:15,609 INFO L93 Difference]: Finished difference Result 606 states and 981 transitions. [2021-12-17 16:12:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 16:12:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:15,620 INFO L225 Difference]: With dead ends: 606 [2021-12-17 16:12:15,620 INFO L226 Difference]: Without dead ends: 512 [2021-12-17 16:12:15,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:12:15,647 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 1755 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:15,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1755 Valid, 960 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:12:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-12-17 16:12:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 261. [2021-12-17 16:12:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5) internal successors, (390), 260 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 390 transitions. [2021-12-17 16:12:15,695 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 390 transitions. Word has length 64 [2021-12-17 16:12:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:15,695 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 390 transitions. [2021-12-17 16:12:15,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 390 transitions. [2021-12-17 16:12:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 16:12:15,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:15,697 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] [2021-12-17 16:12:15,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 16:12:15,697 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash -404660772, now seen corresponding path program 1 times [2021-12-17 16:12:15,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:15,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144476324] [2021-12-17 16:12:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:15,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:15,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:15,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144476324] [2021-12-17 16:12:15,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144476324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:15,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:15,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:15,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928167932] [2021-12-17 16:12:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:15,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:15,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:15,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:15,801 INFO L87 Difference]: Start difference. First operand 261 states and 390 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:15,973 INFO L93 Difference]: Finished difference Result 969 states and 1486 transitions. [2021-12-17 16:12:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:15,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-17 16:12:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:15,978 INFO L225 Difference]: With dead ends: 969 [2021-12-17 16:12:15,978 INFO L226 Difference]: Without dead ends: 767 [2021-12-17 16:12:15,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:15,985 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 895 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:15,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 848 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:12:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-17 16:12:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 761. [2021-12-17 16:12:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.5223684210526316) internal successors, (1157), 760 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1157 transitions. [2021-12-17 16:12:16,054 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1157 transitions. Word has length 65 [2021-12-17 16:12:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:16,054 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1157 transitions. [2021-12-17 16:12:16,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1157 transitions. [2021-12-17 16:12:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 16:12:16,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:16,080 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] [2021-12-17 16:12:16,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 16:12:16,082 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash 372471029, now seen corresponding path program 1 times [2021-12-17 16:12:16,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:16,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643342044] [2021-12-17 16:12:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:16,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:16,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643342044] [2021-12-17 16:12:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643342044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:16,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:16,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:12:16,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161010308] [2021-12-17 16:12:16,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:16,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:12:16,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:12:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:12:16,169 INFO L87 Difference]: Start difference. First operand 761 states and 1157 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-12-17 16:12:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:16,363 INFO L93 Difference]: Finished difference Result 2033 states and 3131 transitions. [2021-12-17 16:12:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:12:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 [2021-12-17 16:12:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:16,368 INFO L225 Difference]: With dead ends: 2033 [2021-12-17 16:12:16,368 INFO L226 Difference]: Without dead ends: 1319 [2021-12-17 16:12:16,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:12:16,370 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 937 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:16,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 233 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:12:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-12-17 16:12:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2021-12-17 16:12:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.5303951367781155) internal successors, (2014), 1316 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 2014 transitions. [2021-12-17 16:12:16,434 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 2014 transitions. Word has length 66 [2021-12-17 16:12:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:16,434 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 2014 transitions. [2021-12-17 16:12:16,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-12-17 16:12:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 2014 transitions. [2021-12-17 16:12:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 16:12:16,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:16,437 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] [2021-12-17 16:12:16,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 16:12:16,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash 342598487, now seen corresponding path program 1 times [2021-12-17 16:12:16,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:16,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551758688] [2021-12-17 16:12:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:16,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:16,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:16,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551758688] [2021-12-17 16:12:16,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551758688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:16,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:16,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:12:16,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672210028] [2021-12-17 16:12:16,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:16,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:12:16,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:12:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:12:16,488 INFO L87 Difference]: Start difference. First operand 1317 states and 2014 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-12-17 16:12:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:16,705 INFO L93 Difference]: Finished difference Result 3529 states and 5448 transitions. [2021-12-17 16:12:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:12:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 [2021-12-17 16:12:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:16,712 INFO L225 Difference]: With dead ends: 3529 [2021-12-17 16:12:16,712 INFO L226 Difference]: Without dead ends: 2309 [2021-12-17 16:12:16,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:12:16,714 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 863 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:16,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 239 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:12:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-12-17 16:12:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2307. [2021-12-17 16:12:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.533391153512576) internal successors, (3536), 2306 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3536 transitions. [2021-12-17 16:12:16,802 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3536 transitions. Word has length 66 [2021-12-17 16:12:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3536 transitions. [2021-12-17 16:12:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-12-17 16:12:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3536 transitions. [2021-12-17 16:12:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 16:12:16,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:16,804 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] [2021-12-17 16:12:16,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 16:12:16,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash -440340154, now seen corresponding path program 1 times [2021-12-17 16:12:16,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:16,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624951601] [2021-12-17 16:12:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:16,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:16,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:16,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624951601] [2021-12-17 16:12:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624951601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:16,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:16,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:12:16,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448979418] [2021-12-17 16:12:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:16,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:12:16,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:12:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:12:16,849 INFO L87 Difference]: Start difference. First operand 2307 states and 3536 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-12-17 16:12:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:17,099 INFO L93 Difference]: Finished difference Result 6570 states and 10123 transitions. [2021-12-17 16:12:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:12:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 [2021-12-17 16:12:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:17,112 INFO L225 Difference]: With dead ends: 6570 [2021-12-17 16:12:17,112 INFO L226 Difference]: Without dead ends: 4333 [2021-12-17 16:12:17,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:12:17,117 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 893 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:17,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 235 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:12:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-12-17 16:12:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 4331. [2021-12-17 16:12:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 1.530715935334873) internal successors, (6628), 4330 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6628 transitions. [2021-12-17 16:12:17,268 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6628 transitions. Word has length 66 [2021-12-17 16:12:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:17,269 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 6628 transitions. [2021-12-17 16:12:17,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-12-17 16:12:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6628 transitions. [2021-12-17 16:12:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 16:12:17,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:17,273 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] [2021-12-17 16:12:17,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 16:12:17,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1058443688, now seen corresponding path program 1 times [2021-12-17 16:12:17,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:17,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222057006] [2021-12-17 16:12:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:17,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:17,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:17,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222057006] [2021-12-17 16:12:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222057006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:17,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:17,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:12:17,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300010063] [2021-12-17 16:12:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:17,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:12:17,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:12:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:12:17,390 INFO L87 Difference]: Start difference. First operand 4331 states and 6628 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:17,667 INFO L93 Difference]: Finished difference Result 8381 states and 12813 transitions. [2021-12-17 16:12:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-17 16:12:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:17,694 INFO L225 Difference]: With dead ends: 8381 [2021-12-17 16:12:17,694 INFO L226 Difference]: Without dead ends: 8379 [2021-12-17 16:12:17,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:17,697 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 228 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:17,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 935 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8379 states. [2021-12-17 16:12:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8379 to 4459. [2021-12-17 16:12:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 1.515477792732167) internal successors, (6756), 4458 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 6756 transitions. [2021-12-17 16:12:17,925 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 6756 transitions. Word has length 67 [2021-12-17 16:12:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:17,926 INFO L470 AbstractCegarLoop]: Abstraction has 4459 states and 6756 transitions. [2021-12-17 16:12:17,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 6756 transitions. [2021-12-17 16:12:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 16:12:17,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:17,927 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] [2021-12-17 16:12:17,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 16:12:17,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1287643169, now seen corresponding path program 1 times [2021-12-17 16:12:17,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:17,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770475014] [2021-12-17 16:12:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:17,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:17,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770475014] [2021-12-17 16:12:17,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770475014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:17,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:17,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:12:17,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291312442] [2021-12-17 16:12:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:17,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:12:17,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:12:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:12:17,994 INFO L87 Difference]: Start difference. First operand 4459 states and 6756 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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) [2021-12-17 16:12:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:18,333 INFO L93 Difference]: Finished difference Result 12111 states and 18358 transitions. [2021-12-17 16:12:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:12:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 [2021-12-17 16:12:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:18,374 INFO L225 Difference]: With dead ends: 12111 [2021-12-17 16:12:18,374 INFO L226 Difference]: Without dead ends: 8061 [2021-12-17 16:12:18,381 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 [2021-12-17 16:12:18,381 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 206 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:18,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 681 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-12-17 16:12:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8059. [2021-12-17 16:12:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8059 states, 8058 states have (on average 1.5026061057334326) internal successors, (12108), 8058 states have internal predecessors, (12108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8059 states to 8059 states and 12108 transitions. [2021-12-17 16:12:18,771 INFO L78 Accepts]: Start accepts. Automaton has 8059 states and 12108 transitions. Word has length 68 [2021-12-17 16:12:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:18,771 INFO L470 AbstractCegarLoop]: Abstraction has 8059 states and 12108 transitions. [2021-12-17 16:12:18,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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) [2021-12-17 16:12:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 8059 states and 12108 transitions. [2021-12-17 16:12:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:18,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:18,773 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] [2021-12-17 16:12:18,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 16:12:18,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1292543968, now seen corresponding path program 1 times [2021-12-17 16:12:18,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:18,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947012044] [2021-12-17 16:12:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:18,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:18,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947012044] [2021-12-17 16:12:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947012044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:18,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:18,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:18,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447126169] [2021-12-17 16:12:18,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:18,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:18,802 INFO L87 Difference]: Start difference. First operand 8059 states and 12108 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:19,102 INFO L93 Difference]: Finished difference Result 11123 states and 16678 transitions. [2021-12-17 16:12:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:19,115 INFO L225 Difference]: With dead ends: 11123 [2021-12-17 16:12:19,116 INFO L226 Difference]: Without dead ends: 8869 [2021-12-17 16:12:19,119 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 [2021-12-17 16:12:19,119 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 136 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:19,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 443 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2021-12-17 16:12:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 7883. [2021-12-17 16:12:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 7882 states have (on average 1.4752600862725196) internal successors, (11628), 7882 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 11628 transitions. [2021-12-17 16:12:19,518 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 11628 transitions. Word has length 69 [2021-12-17 16:12:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:19,520 INFO L470 AbstractCegarLoop]: Abstraction has 7883 states and 11628 transitions. [2021-12-17 16:12:19,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 11628 transitions. [2021-12-17 16:12:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:19,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:19,522 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] [2021-12-17 16:12:19,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 16:12:19,523 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash 494119873, now seen corresponding path program 1 times [2021-12-17 16:12:19,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:19,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288543543] [2021-12-17 16:12:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:19,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:19,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288543543] [2021-12-17 16:12:19,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288543543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:19,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:19,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:19,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72434595] [2021-12-17 16:12:19,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:19,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:19,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:19,559 INFO L87 Difference]: Start difference. First operand 7883 states and 11628 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:19,946 INFO L93 Difference]: Finished difference Result 13072 states and 19309 transitions. [2021-12-17 16:12:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:19,961 INFO L225 Difference]: With dead ends: 13072 [2021-12-17 16:12:19,961 INFO L226 Difference]: Without dead ends: 9034 [2021-12-17 16:12:19,968 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 [2021-12-17 16:12:19,968 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 146 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:19,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 441 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-12-17 16:12:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 8920. [2021-12-17 16:12:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8920 states, 8919 states have (on average 1.4489292521583137) internal successors, (12923), 8919 states have internal predecessors, (12923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 12923 transitions. [2021-12-17 16:12:20,356 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 12923 transitions. Word has length 69 [2021-12-17 16:12:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:20,357 INFO L470 AbstractCegarLoop]: Abstraction has 8920 states and 12923 transitions. [2021-12-17 16:12:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 12923 transitions. [2021-12-17 16:12:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:20,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:20,358 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] [2021-12-17 16:12:20,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 16:12:20,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:20,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2048736576, now seen corresponding path program 1 times [2021-12-17 16:12:20,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039576934] [2021-12-17 16:12:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:20,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:20,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:20,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039576934] [2021-12-17 16:12:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039576934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:20,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:20,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:20,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245781901] [2021-12-17 16:12:20,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:20,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:20,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:20,406 INFO L87 Difference]: Start difference. First operand 8920 states and 12923 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:20,934 INFO L93 Difference]: Finished difference Result 18117 states and 26451 transitions. [2021-12-17 16:12:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:20,959 INFO L225 Difference]: With dead ends: 18117 [2021-12-17 16:12:20,959 INFO L226 Difference]: Without dead ends: 14739 [2021-12-17 16:12:20,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:12:20,969 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 1048 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:20,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1266 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14739 states. [2021-12-17 16:12:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14739 to 12299. [2021-12-17 16:12:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12299 states, 12298 states have (on average 1.4501544966661246) internal successors, (17834), 12298 states have internal predecessors, (17834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12299 states to 12299 states and 17834 transitions. [2021-12-17 16:12:21,665 INFO L78 Accepts]: Start accepts. Automaton has 12299 states and 17834 transitions. Word has length 69 [2021-12-17 16:12:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:21,665 INFO L470 AbstractCegarLoop]: Abstraction has 12299 states and 17834 transitions. [2021-12-17 16:12:21,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 12299 states and 17834 transitions. [2021-12-17 16:12:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:21,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:21,667 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] [2021-12-17 16:12:21,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 16:12:21,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1719145697, now seen corresponding path program 1 times [2021-12-17 16:12:21,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:21,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765827926] [2021-12-17 16:12:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:21,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:21,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765827926] [2021-12-17 16:12:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765827926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:21,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:21,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:21,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417581802] [2021-12-17 16:12:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:21,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:21,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:21,697 INFO L87 Difference]: Start difference. First operand 12299 states and 17834 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:22,566 INFO L93 Difference]: Finished difference Result 32080 states and 46504 transitions. [2021-12-17 16:12:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:22,610 INFO L225 Difference]: With dead ends: 32080 [2021-12-17 16:12:22,610 INFO L226 Difference]: Without dead ends: 21711 [2021-12-17 16:12:22,626 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 [2021-12-17 16:12:22,627 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 161 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:22,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 454 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21711 states. [2021-12-17 16:12:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21711 to 21709. [2021-12-17 16:12:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21709 states, 21708 states have (on average 1.4337110742583379) internal successors, (31123), 21708 states have internal predecessors, (31123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 31123 transitions. [2021-12-17 16:12:23,680 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 31123 transitions. Word has length 69 [2021-12-17 16:12:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:23,680 INFO L470 AbstractCegarLoop]: Abstraction has 21709 states and 31123 transitions. [2021-12-17 16:12:23,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 31123 transitions. [2021-12-17 16:12:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:23,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:23,687 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] [2021-12-17 16:12:23,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 16:12:23,687 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash -760950752, now seen corresponding path program 1 times [2021-12-17 16:12:23,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:23,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061865424] [2021-12-17 16:12:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:23,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:23,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061865424] [2021-12-17 16:12:23,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061865424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:23,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:23,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:23,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677388449] [2021-12-17 16:12:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:23,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:23,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:23,755 INFO L87 Difference]: Start difference. First operand 21709 states and 31123 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:24,813 INFO L93 Difference]: Finished difference Result 30959 states and 44556 transitions. [2021-12-17 16:12:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:24,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:24,862 INFO L225 Difference]: With dead ends: 30959 [2021-12-17 16:12:24,862 INFO L226 Difference]: Without dead ends: 29529 [2021-12-17 16:12:24,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:12:24,874 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 1053 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:24,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1133 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29529 states. [2021-12-17 16:12:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29529 to 23123. [2021-12-17 16:12:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23123 states, 23122 states have (on average 1.4337427558169709) internal successors, (33151), 23122 states have internal predecessors, (33151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23123 states to 23123 states and 33151 transitions. [2021-12-17 16:12:26,033 INFO L78 Accepts]: Start accepts. Automaton has 23123 states and 33151 transitions. Word has length 69 [2021-12-17 16:12:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:26,033 INFO L470 AbstractCegarLoop]: Abstraction has 23123 states and 33151 transitions. [2021-12-17 16:12:26,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 23123 states and 33151 transitions. [2021-12-17 16:12:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:26,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:26,036 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] [2021-12-17 16:12:26,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 16:12:26,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1412359137, now seen corresponding path program 1 times [2021-12-17 16:12:26,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:26,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897643906] [2021-12-17 16:12:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:26,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:26,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:26,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897643906] [2021-12-17 16:12:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897643906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:26,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:26,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:26,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208574648] [2021-12-17 16:12:26,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:26,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:26,085 INFO L87 Difference]: Start difference. First operand 23123 states and 33151 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:27,401 INFO L93 Difference]: Finished difference Result 34079 states and 49066 transitions. [2021-12-17 16:12:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:27,453 INFO L225 Difference]: With dead ends: 34079 [2021-12-17 16:12:27,453 INFO L226 Difference]: Without dead ends: 30905 [2021-12-17 16:12:27,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:12:27,471 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 970 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:27,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1297 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30905 states. [2021-12-17 16:12:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30905 to 26279. [2021-12-17 16:12:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26279 states, 26278 states have (on average 1.4337849151381383) internal successors, (37677), 26278 states have internal predecessors, (37677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26279 states to 26279 states and 37677 transitions. [2021-12-17 16:12:28,737 INFO L78 Accepts]: Start accepts. Automaton has 26279 states and 37677 transitions. Word has length 69 [2021-12-17 16:12:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:28,737 INFO L470 AbstractCegarLoop]: Abstraction has 26279 states and 37677 transitions. [2021-12-17 16:12:28,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 26279 states and 37677 transitions. [2021-12-17 16:12:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 16:12:28,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:28,741 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] [2021-12-17 16:12:28,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 16:12:28,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash -677295103, now seen corresponding path program 1 times [2021-12-17 16:12:28,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068753777] [2021-12-17 16:12:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:28,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:28,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068753777] [2021-12-17 16:12:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068753777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:28,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:28,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:28,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638027641] [2021-12-17 16:12:28,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:28,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:28,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:28,789 INFO L87 Difference]: Start difference. First operand 26279 states and 37677 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:30,255 INFO L93 Difference]: Finished difference Result 44617 states and 64316 transitions. [2021-12-17 16:12:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 16:12:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:30,317 INFO L225 Difference]: With dead ends: 44617 [2021-12-17 16:12:30,317 INFO L226 Difference]: Without dead ends: 37299 [2021-12-17 16:12:30,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:12:30,340 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 1056 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:30,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 1254 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37299 states. [2021-12-17 16:12:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37299 to 31857. [2021-12-17 16:12:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31857 states, 31856 states have (on average 1.4341725263686589) internal successors, (45687), 31856 states have internal predecessors, (45687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31857 states to 31857 states and 45687 transitions. [2021-12-17 16:12:31,848 INFO L78 Accepts]: Start accepts. Automaton has 31857 states and 45687 transitions. Word has length 69 [2021-12-17 16:12:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:31,848 INFO L470 AbstractCegarLoop]: Abstraction has 31857 states and 45687 transitions. [2021-12-17 16:12:31,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 31857 states and 45687 transitions. [2021-12-17 16:12:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 16:12:31,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:31,852 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] [2021-12-17 16:12:31,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 16:12:31,852 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash -652960215, now seen corresponding path program 1 times [2021-12-17 16:12:31,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:31,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215593397] [2021-12-17 16:12:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:31,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:31,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215593397] [2021-12-17 16:12:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215593397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:31,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:31,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801807760] [2021-12-17 16:12:31,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:31,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:31,875 INFO L87 Difference]: Start difference. First operand 31857 states and 45687 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-12-17 16:12:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:33,306 INFO L93 Difference]: Finished difference Result 64721 states and 92346 transitions. [2021-12-17 16:12:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 [2021-12-17 16:12:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:33,363 INFO L225 Difference]: With dead ends: 64721 [2021-12-17 16:12:33,363 INFO L226 Difference]: Without dead ends: 35118 [2021-12-17 16:12:33,399 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 [2021-12-17 16:12:33,400 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 151 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:33,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 533 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35118 states. [2021-12-17 16:12:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35118 to 32090. [2021-12-17 16:12:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32090 states, 32089 states have (on average 1.3965844993611518) internal successors, (44815), 32089 states have internal predecessors, (44815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32090 states to 32090 states and 44815 transitions. [2021-12-17 16:12:35,481 INFO L78 Accepts]: Start accepts. Automaton has 32090 states and 44815 transitions. Word has length 72 [2021-12-17 16:12:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:35,482 INFO L470 AbstractCegarLoop]: Abstraction has 32090 states and 44815 transitions. [2021-12-17 16:12:35,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-12-17 16:12:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32090 states and 44815 transitions. [2021-12-17 16:12:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 16:12:35,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:35,488 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] [2021-12-17 16:12:35,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 16:12:35,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1885352739, now seen corresponding path program 1 times [2021-12-17 16:12:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:35,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684874915] [2021-12-17 16:12:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:35,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:35,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:35,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684874915] [2021-12-17 16:12:35,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684874915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:35,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:35,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:35,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759727328] [2021-12-17 16:12:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:35,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:12:35,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:12:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:12:35,536 INFO L87 Difference]: Start difference. First operand 32090 states and 44815 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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) [2021-12-17 16:12:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:42,565 INFO L93 Difference]: Finished difference Result 142873 states and 198944 transitions. [2021-12-17 16:12:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 16:12:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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 [2021-12-17 16:12:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:42,865 INFO L225 Difference]: With dead ends: 142873 [2021-12-17 16:12:42,865 INFO L226 Difference]: Without dead ends: 132500 [2021-12-17 16:12:42,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 16:12:42,917 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 3356 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:42,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3356 Valid, 456 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:12:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132500 states. [2021-12-17 16:12:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132500 to 32114. [2021-12-17 16:12:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32114 states, 32113 states have (on average 1.396537227913929) internal successors, (44847), 32113 states have internal predecessors, (44847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32114 states to 32114 states and 44847 transitions. [2021-12-17 16:12:45,664 INFO L78 Accepts]: Start accepts. Automaton has 32114 states and 44847 transitions. Word has length 74 [2021-12-17 16:12:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:45,664 INFO L470 AbstractCegarLoop]: Abstraction has 32114 states and 44847 transitions. [2021-12-17 16:12:45,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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) [2021-12-17 16:12:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32114 states and 44847 transitions. [2021-12-17 16:12:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 16:12:45,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:45,670 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] [2021-12-17 16:12:45,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 16:12:45,670 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash 69047324, now seen corresponding path program 1 times [2021-12-17 16:12:45,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287400896] [2021-12-17 16:12:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:45,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:45,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287400896] [2021-12-17 16:12:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287400896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:45,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:45,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:45,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061804599] [2021-12-17 16:12:45,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:45,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:12:45,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:12:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:12:45,717 INFO L87 Difference]: Start difference. First operand 32114 states and 44847 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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)