./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf92f342b2da275c63d151f2d4ed52683d7003506826ae2897efde5e3c66195f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:52:58,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:52:58,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:52:58,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:52:58,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:52:58,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:52:58,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:52:58,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:52:58,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:52:58,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:52:58,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:52:58,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:52:58,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:52:58,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:52:58,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:52:58,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:52:58,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:52:58,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:52:58,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:52:58,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:52:58,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:52:58,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:52:58,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:52:58,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:52:58,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:52:58,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:52:58,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:52:58,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:52:58,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:52:58,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:52:58,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:52:58,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:52:58,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:52:58,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:52:58,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:52:58,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:52:58,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:52:58,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:52:58,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:52:58,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:52:58,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:52:58,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:52:58,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:52:58,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:52:58,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:52:58,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:52:58,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:52:58,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:52:58,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:52:58,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:52:58,939 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:52:58,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:52:58,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:52:58,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:52:58,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:52:58,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:52:58,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:52:58,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:52:58,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:52:58,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:52:58,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:52:58,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:52:58,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:52:58,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:52:58,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:52:58,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:52:58,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:52:58,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:52:58,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:52:58,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:52:58,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf92f342b2da275c63d151f2d4ed52683d7003506826ae2897efde5e3c66195f [2021-12-22 11:52:59,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:52:59,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:52:59,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:52:59,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:52:59,192 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:52:59,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2021-12-22 11:52:59,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10448afba/a84e9aaae4bb4bc3b3b7c365e6285fe4/FLAGa2d1de4e1 [2021-12-22 11:52:59,639 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:52:59,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2021-12-22 11:52:59,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10448afba/a84e9aaae4bb4bc3b3b7c365e6285fe4/FLAGa2d1de4e1 [2021-12-22 11:52:59,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10448afba/a84e9aaae4bb4bc3b3b7c365e6285fe4 [2021-12-22 11:52:59,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:52:59,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:52:59,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:52:59,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:52:59,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:52:59,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:59" (1/1) ... [2021-12-22 11:52:59,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d79db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59, skipping insertion in model container [2021-12-22 11:52:59,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:59" (1/1) ... [2021-12-22 11:52:59,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:52:59,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:52:59,938 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c[14373,14386] [2021-12-22 11:52:59,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:52:59,948 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:53:00,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c[14373,14386] [2021-12-22 11:53:00,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:53:00,025 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:53:00,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00 WrapperNode [2021-12-22 11:53:00,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:53:00,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:53:00,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:53:00,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:53:00,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,082 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 479 [2021-12-22 11:53:00,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:53:00,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:53:00,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:53:00,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:53:00,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:53:00,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:53:00,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:53:00,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:53:00,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (1/1) ... [2021-12-22 11:53:00,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:53:00,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:53:00,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:53:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:53:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:53:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:53:00,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:53:00,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:53:00,281 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:53:00,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:53:00,631 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:53:00,637 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:53:00,637 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:53:00,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:00 BoogieIcfgContainer [2021-12-22 11:53:00,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:53:00,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:53:00,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:53:00,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:53:00,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:52:59" (1/3) ... [2021-12-22 11:53:00,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c001d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:00, skipping insertion in model container [2021-12-22 11:53:00,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:00" (2/3) ... [2021-12-22 11:53:00,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c001d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:00, skipping insertion in model container [2021-12-22 11:53:00,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:00" (3/3) ... [2021-12-22 11:53:00,645 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2021-12-22 11:53:00,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:53:00,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:53:00,688 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:53:00,698 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:53:00,699 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:53:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:53:00,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:00,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:00,718 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2021-12-22 11:53:00,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:00,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054432300] [2021-12-22 11:53:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:00,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:00,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:00,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054432300] [2021-12-22 11:53:00,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054432300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:00,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:00,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:53:00,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617705806] [2021-12-22 11:53:00,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:00,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:53:00,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:53:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:53:00,874 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:00,904 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2021-12-22 11:53:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:53:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-22 11:53:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:00,912 INFO L225 Difference]: With dead ends: 227 [2021-12-22 11:53:00,912 INFO L226 Difference]: Without dead ends: 139 [2021-12-22 11:53:00,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:53:00,917 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:00,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-22 11:53:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-22 11:53:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7463768115942029) internal successors, (241), 138 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2021-12-22 11:53:00,944 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2021-12-22 11:53:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:00,945 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2021-12-22 11:53:00,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2021-12-22 11:53:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:53:00,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:00,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:00,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:53:00,947 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2021-12-22 11:53:00,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:00,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134742341] [2021-12-22 11:53:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:00,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134742341] [2021-12-22 11:53:01,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134742341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:01,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157143591] [2021-12-22 11:53:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:01,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:01,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:01,057 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:01,132 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2021-12-22 11:53:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-22 11:53:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:01,136 INFO L225 Difference]: With dead ends: 222 [2021-12-22 11:53:01,136 INFO L226 Difference]: Without dead ends: 139 [2021-12-22 11:53:01,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:53:01,139 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 3 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:01,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 923 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-22 11:53:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-22 11:53:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2021-12-22 11:53:01,150 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2021-12-22 11:53:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:01,151 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2021-12-22 11:53:01,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2021-12-22 11:53:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:53:01,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:01,157 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] [2021-12-22 11:53:01,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:53:01,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2021-12-22 11:53:01,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:01,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799938431] [2021-12-22 11:53:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:01,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799938431] [2021-12-22 11:53:01,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799938431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:01,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782924829] [2021-12-22 11:53:01,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:01,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:01,235 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:01,257 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2021-12-22 11:53:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 11:53:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:01,259 INFO L225 Difference]: With dead ends: 287 [2021-12-22 11:53:01,259 INFO L226 Difference]: Without dead ends: 208 [2021-12-22 11:53:01,260 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 [2021-12-22 11:53:01,261 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:01,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 374 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-22 11:53:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-12-22 11:53:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 205 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2021-12-22 11:53:01,270 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2021-12-22 11:53:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2021-12-22 11:53:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2021-12-22 11:53:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:53:01,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:01,272 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] [2021-12-22 11:53:01,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:53:01,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2021-12-22 11:53:01,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360471471] [2021-12-22 11:53:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:01,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360471471] [2021-12-22 11:53:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360471471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:01,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528705930] [2021-12-22 11:53:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:01,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:01,324 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:01,337 INFO L93 Difference]: Finished difference Result 482 states and 776 transitions. [2021-12-22 11:53:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:53:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:01,338 INFO L225 Difference]: With dead ends: 482 [2021-12-22 11:53:01,339 INFO L226 Difference]: Without dead ends: 336 [2021-12-22 11:53:01,339 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 [2021-12-22 11:53:01,340 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:01,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 386 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-22 11:53:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2021-12-22 11:53:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.5945945945945945) internal successors, (531), 333 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 531 transitions. [2021-12-22 11:53:01,351 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 531 transitions. Word has length 68 [2021-12-22 11:53:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:01,351 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 531 transitions. [2021-12-22 11:53:01,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 531 transitions. [2021-12-22 11:53:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 11:53:01,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:01,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:01,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:53:01,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2021-12-22 11:53:01,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33586229] [2021-12-22 11:53:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:01,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33586229] [2021-12-22 11:53:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33586229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:01,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053525427] [2021-12-22 11:53:01,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:01,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:01,411 INFO L87 Difference]: Start difference. First operand 334 states and 531 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:01,431 INFO L93 Difference]: Finished difference Result 850 states and 1381 transitions. [2021-12-22 11:53:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:01,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-22 11:53:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:01,433 INFO L225 Difference]: With dead ends: 850 [2021-12-22 11:53:01,433 INFO L226 Difference]: Without dead ends: 576 [2021-12-22 11:53:01,434 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 [2021-12-22 11:53:01,435 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 103 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:01,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-12-22 11:53:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2021-12-22 11:53:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.6108202443280977) internal successors, (923), 573 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 923 transitions. [2021-12-22 11:53:01,449 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 923 transitions. Word has length 70 [2021-12-22 11:53:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:01,449 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 923 transitions. [2021-12-22 11:53:01,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 923 transitions. [2021-12-22 11:53:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:53:01,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:01,451 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] [2021-12-22 11:53:01,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:53:01,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2021-12-22 11:53:01,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556713896] [2021-12-22 11:53:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556713896] [2021-12-22 11:53:01,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556713896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:01,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253735651] [2021-12-22 11:53:01,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:01,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:01,499 INFO L87 Difference]: Start difference. First operand 574 states and 923 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:01,624 INFO L93 Difference]: Finished difference Result 2450 states and 4045 transitions. [2021-12-22 11:53:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:53:01,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-22 11:53:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:01,630 INFO L225 Difference]: With dead ends: 2450 [2021-12-22 11:53:01,630 INFO L226 Difference]: Without dead ends: 1936 [2021-12-22 11:53:01,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:53:01,631 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 778 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:01,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1306 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-12-22 11:53:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1023. [2021-12-22 11:53:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.6252446183953033) internal successors, (1661), 1022 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1661 transitions. [2021-12-22 11:53:01,675 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1661 transitions. Word has length 72 [2021-12-22 11:53:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:01,676 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1661 transitions. [2021-12-22 11:53:01,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1661 transitions. [2021-12-22 11:53:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 11:53:01,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:01,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:01,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:53:01,680 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2021-12-22 11:53:01,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:01,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617537598] [2021-12-22 11:53:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:01,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617537598] [2021-12-22 11:53:01,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617537598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:01,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389740563] [2021-12-22 11:53:01,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:01,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:01,751 INFO L87 Difference]: Start difference. First operand 1023 states and 1661 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:01,820 INFO L93 Difference]: Finished difference Result 2972 states and 4898 transitions. [2021-12-22 11:53:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-22 11:53:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:01,826 INFO L225 Difference]: With dead ends: 2972 [2021-12-22 11:53:01,826 INFO L226 Difference]: Without dead ends: 2009 [2021-12-22 11:53:01,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:01,828 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 385 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:01,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 689 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-12-22 11:53:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1507. [2021-12-22 11:53:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 1.6328021248339974) internal successors, (2459), 1506 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2459 transitions. [2021-12-22 11:53:01,915 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2459 transitions. Word has length 73 [2021-12-22 11:53:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:01,915 INFO L470 AbstractCegarLoop]: Abstraction has 1507 states and 2459 transitions. [2021-12-22 11:53:01,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2459 transitions. [2021-12-22 11:53:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 11:53:01,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:01,918 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] [2021-12-22 11:53:01,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:53:01,918 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2021-12-22 11:53:01,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887073380] [2021-12-22 11:53:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:01,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:01,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:01,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887073380] [2021-12-22 11:53:01,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887073380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:01,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:01,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:01,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425636590] [2021-12-22 11:53:01,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:01,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:01,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:01,956 INFO L87 Difference]: Start difference. First operand 1507 states and 2459 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:02,005 INFO L93 Difference]: Finished difference Result 2973 states and 4868 transitions. [2021-12-22 11:53:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-22 11:53:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:02,012 INFO L225 Difference]: With dead ends: 2973 [2021-12-22 11:53:02,012 INFO L226 Difference]: Without dead ends: 2147 [2021-12-22 11:53:02,013 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 [2021-12-22 11:53:02,014 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 110 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:02,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 456 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-12-22 11:53:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2145. [2021-12-22 11:53:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 1.625) internal successors, (3484), 2144 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3484 transitions. [2021-12-22 11:53:02,090 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3484 transitions. Word has length 74 [2021-12-22 11:53:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:02,091 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 3484 transitions. [2021-12-22 11:53:02,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3484 transitions. [2021-12-22 11:53:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 11:53:02,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:02,092 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] [2021-12-22 11:53:02,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:53:02,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2021-12-22 11:53:02,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:02,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025342671] [2021-12-22 11:53:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:02,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:02,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:02,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025342671] [2021-12-22 11:53:02,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025342671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:02,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:02,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:02,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783019943] [2021-12-22 11:53:02,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:02,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:02,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:02,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:02,140 INFO L87 Difference]: Start difference. First operand 2145 states and 3484 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:02,260 INFO L93 Difference]: Finished difference Result 6648 states and 10865 transitions. [2021-12-22 11:53:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-22 11:53:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:02,272 INFO L225 Difference]: With dead ends: 6648 [2021-12-22 11:53:02,272 INFO L226 Difference]: Without dead ends: 4593 [2021-12-22 11:53:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:02,275 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 384 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:02,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 686 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-12-22 11:53:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3357. [2021-12-22 11:53:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3357 states, 3356 states have (on average 1.6215733015494636) internal successors, (5442), 3356 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 5442 transitions. [2021-12-22 11:53:02,395 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 5442 transitions. Word has length 74 [2021-12-22 11:53:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:02,395 INFO L470 AbstractCegarLoop]: Abstraction has 3357 states and 5442 transitions. [2021-12-22 11:53:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 5442 transitions. [2021-12-22 11:53:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 11:53:02,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:02,396 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] [2021-12-22 11:53:02,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:53:02,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2021-12-22 11:53:02,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:02,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779527809] [2021-12-22 11:53:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:02,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:02,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779527809] [2021-12-22 11:53:02,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779527809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:02,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:02,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:02,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389922528] [2021-12-22 11:53:02,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:02,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:02,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:02,422 INFO L87 Difference]: Start difference. First operand 3357 states and 5442 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:02,540 INFO L93 Difference]: Finished difference Result 6689 states and 10862 transitions. [2021-12-22 11:53:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-22 11:53:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:02,553 INFO L225 Difference]: With dead ends: 6689 [2021-12-22 11:53:02,553 INFO L226 Difference]: Without dead ends: 4777 [2021-12-22 11:53:02,555 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 [2021-12-22 11:53:02,555 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 104 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:02,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 439 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-12-22 11:53:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2021-12-22 11:53:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 1.6108085462924173) internal successors, (7690), 4774 states have internal predecessors, (7690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7690 transitions. [2021-12-22 11:53:02,713 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7690 transitions. Word has length 74 [2021-12-22 11:53:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:02,713 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 7690 transitions. [2021-12-22 11:53:02,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7690 transitions. [2021-12-22 11:53:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 11:53:02,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:02,714 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] [2021-12-22 11:53:02,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:53:02,715 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2021-12-22 11:53:02,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:02,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776721959] [2021-12-22 11:53:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:02,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:02,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776721959] [2021-12-22 11:53:02,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776721959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:02,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:02,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302542320] [2021-12-22 11:53:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:02,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:02,741 INFO L87 Difference]: Start difference. First operand 4775 states and 7690 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:02,930 INFO L93 Difference]: Finished difference Result 10486 states and 17043 transitions. [2021-12-22 11:53:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-22 11:53:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:02,948 INFO L225 Difference]: With dead ends: 10486 [2021-12-22 11:53:02,948 INFO L226 Difference]: Without dead ends: 7079 [2021-12-22 11:53:02,951 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 [2021-12-22 11:53:02,952 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 116 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:02,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 479 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:02,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2021-12-22 11:53:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7077. [2021-12-22 11:53:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 1.6075466365178066) internal successors, (11375), 7076 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 11375 transitions. [2021-12-22 11:53:03,172 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 11375 transitions. Word has length 74 [2021-12-22 11:53:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:03,172 INFO L470 AbstractCegarLoop]: Abstraction has 7077 states and 11375 transitions. [2021-12-22 11:53:03,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 11375 transitions. [2021-12-22 11:53:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-22 11:53:03,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:03,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:03,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:53:03,173 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2021-12-22 11:53:03,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786243271] [2021-12-22 11:53:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:03,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:03,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:03,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786243271] [2021-12-22 11:53:03,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786243271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:03,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:03,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:03,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229275464] [2021-12-22 11:53:03,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:03,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:03,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:03,205 INFO L87 Difference]: Start difference. First operand 7077 states and 11375 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:03,726 INFO L93 Difference]: Finished difference Result 22184 states and 35744 transitions. [2021-12-22 11:53:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-22 11:53:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:03,795 INFO L225 Difference]: With dead ends: 22184 [2021-12-22 11:53:03,796 INFO L226 Difference]: Without dead ends: 15193 [2021-12-22 11:53:03,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:03,809 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 382 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:03,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 688 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2021-12-22 11:53:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 11092. [2021-12-22 11:53:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 1.5980524749797134) internal successors, (17724), 11091 states have internal predecessors, (17724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17724 transitions. [2021-12-22 11:53:04,194 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17724 transitions. Word has length 75 [2021-12-22 11:53:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:04,194 INFO L470 AbstractCegarLoop]: Abstraction has 11092 states and 17724 transitions. [2021-12-22 11:53:04,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17724 transitions. [2021-12-22 11:53:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 11:53:04,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:04,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:04,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:53:04,195 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2021-12-22 11:53:04,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:04,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379874237] [2021-12-22 11:53:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:04,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:04,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379874237] [2021-12-22 11:53:04,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379874237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:04,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:04,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:04,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689576140] [2021-12-22 11:53:04,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:04,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:04,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:04,333 INFO L87 Difference]: Start difference. First operand 11092 states and 17724 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:04,609 INFO L93 Difference]: Finished difference Result 22100 states and 35333 transitions. [2021-12-22 11:53:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-22 11:53:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:04,627 INFO L225 Difference]: With dead ends: 22100 [2021-12-22 11:53:04,627 INFO L226 Difference]: Without dead ends: 11094 [2021-12-22 11:53:04,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:53:04,642 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 386 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:04,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 562 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11094 states. [2021-12-22 11:53:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11094 to 11092. [2021-12-22 11:53:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 1.5867820755567577) internal successors, (17599), 11091 states have internal predecessors, (17599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17599 transitions. [2021-12-22 11:53:04,977 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17599 transitions. Word has length 77 [2021-12-22 11:53:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:04,977 INFO L470 AbstractCegarLoop]: Abstraction has 11092 states and 17599 transitions. [2021-12-22 11:53:04,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17599 transitions. [2021-12-22 11:53:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 11:53:04,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:04,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:04,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:53:04,979 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1222308264, now seen corresponding path program 1 times [2021-12-22 11:53:04,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:04,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476255573] [2021-12-22 11:53:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:04,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:05,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476255573] [2021-12-22 11:53:05,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476255573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:05,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:05,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:05,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083592836] [2021-12-22 11:53:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:05,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:05,049 INFO L87 Difference]: Start difference. First operand 11092 states and 17599 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:05,616 INFO L93 Difference]: Finished difference Result 31756 states and 50533 transitions. [2021-12-22 11:53:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-22 11:53:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:05,648 INFO L225 Difference]: With dead ends: 31756 [2021-12-22 11:53:05,648 INFO L226 Difference]: Without dead ends: 20750 [2021-12-22 11:53:05,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:53:05,661 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 178 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:05,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 750 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20750 states. [2021-12-22 11:53:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20750 to 20748. [2021-12-22 11:53:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20748 states, 20747 states have (on average 1.5742034993011038) internal successors, (32660), 20747 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20748 states to 20748 states and 32660 transitions. [2021-12-22 11:53:06,385 INFO L78 Accepts]: Start accepts. Automaton has 20748 states and 32660 transitions. Word has length 80 [2021-12-22 11:53:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:06,386 INFO L470 AbstractCegarLoop]: Abstraction has 20748 states and 32660 transitions. [2021-12-22 11:53:06,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20748 states and 32660 transitions. [2021-12-22 11:53:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 11:53:06,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:06,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:06,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:53:06,388 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash 334573870, now seen corresponding path program 1 times [2021-12-22 11:53:06,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:06,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156150027] [2021-12-22 11:53:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:06,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:06,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156150027] [2021-12-22 11:53:06,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156150027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:06,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:06,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:06,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576505902] [2021-12-22 11:53:06,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:06,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:06,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:06,442 INFO L87 Difference]: Start difference. First operand 20748 states and 32660 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:07,482 INFO L93 Difference]: Finished difference Result 40559 states and 63106 transitions. [2021-12-22 11:53:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:53:07,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-22 11:53:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:07,601 INFO L225 Difference]: With dead ends: 40559 [2021-12-22 11:53:07,602 INFO L226 Difference]: Without dead ends: 40557 [2021-12-22 11:53:07,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:53:07,613 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 341 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:07,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 911 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40557 states. [2021-12-22 11:53:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40557 to 21834. [2021-12-22 11:53:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 1.5452296981633307) internal successors, (33737), 21833 states have internal predecessors, (33737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 33737 transitions. [2021-12-22 11:53:08,505 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 33737 transitions. Word has length 81 [2021-12-22 11:53:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 21834 states and 33737 transitions. [2021-12-22 11:53:08,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 33737 transitions. [2021-12-22 11:53:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 11:53:08,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:08,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:08,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:53:08,508 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1678408875, now seen corresponding path program 1 times [2021-12-22 11:53:08,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906402349] [2021-12-22 11:53:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:08,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:53:08,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906402349] [2021-12-22 11:53:08,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906402349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:08,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:08,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531019846] [2021-12-22 11:53:08,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:08,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:08,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:08,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:08,551 INFO L87 Difference]: Start difference. First operand 21834 states and 33737 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:09,928 INFO L93 Difference]: Finished difference Result 53362 states and 82659 transitions. [2021-12-22 11:53:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-22 11:53:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:10,007 INFO L225 Difference]: With dead ends: 53362 [2021-12-22 11:53:10,007 INFO L226 Difference]: Without dead ends: 43020 [2021-12-22 11:53:10,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:53:10,037 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 488 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:10,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 907 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43020 states. [2021-12-22 11:53:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43020 to 33554. [2021-12-22 11:53:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33554 states, 33553 states have (on average 1.5432003099573808) internal successors, (51779), 33553 states have internal predecessors, (51779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33554 states to 33554 states and 51779 transitions. [2021-12-22 11:53:11,474 INFO L78 Accepts]: Start accepts. Automaton has 33554 states and 51779 transitions. Word has length 107 [2021-12-22 11:53:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:11,475 INFO L470 AbstractCegarLoop]: Abstraction has 33554 states and 51779 transitions. [2021-12-22 11:53:11,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 33554 states and 51779 transitions. [2021-12-22 11:53:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 11:53:11,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:11,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:11,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:53:11,477 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash 333972341, now seen corresponding path program 1 times [2021-12-22 11:53:11,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813120980] [2021-12-22 11:53:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:11,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 11:53:11,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813120980] [2021-12-22 11:53:11,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813120980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:11,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:11,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:11,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413942569] [2021-12-22 11:53:11,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:11,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:11,518 INFO L87 Difference]: Start difference. First operand 33554 states and 51779 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:12,934 INFO L93 Difference]: Finished difference Result 57498 states and 89067 transitions. [2021-12-22 11:53:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-22 11:53:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:13,010 INFO L225 Difference]: With dead ends: 57498 [2021-12-22 11:53:13,010 INFO L226 Difference]: Without dead ends: 47156 [2021-12-22 11:53:13,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:53:13,035 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 496 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:13,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 896 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47156 states. [2021-12-22 11:53:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47156 to 45454. [2021-12-22 11:53:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45454 states, 45453 states have (on average 1.54333047323609) internal successors, (70149), 45453 states have internal predecessors, (70149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45454 states to 45454 states and 70149 transitions. [2021-12-22 11:53:14,754 INFO L78 Accepts]: Start accepts. Automaton has 45454 states and 70149 transitions. Word has length 107 [2021-12-22 11:53:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:14,755 INFO L470 AbstractCegarLoop]: Abstraction has 45454 states and 70149 transitions. [2021-12-22 11:53:14,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 45454 states and 70149 transitions. [2021-12-22 11:53:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 11:53:14,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:14,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:14,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:53:14,768 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1491363019, now seen corresponding path program 1 times [2021-12-22 11:53:14,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:14,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522694438] [2021-12-22 11:53:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:14,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:53:14,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:14,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522694438] [2021-12-22 11:53:14,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522694438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:14,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:14,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:14,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177689021] [2021-12-22 11:53:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:14,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:14,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:14,841 INFO L87 Difference]: Start difference. First operand 45454 states and 70149 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:16,740 INFO L93 Difference]: Finished difference Result 64542 states and 100125 transitions. [2021-12-22 11:53:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-22 11:53:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:16,830 INFO L225 Difference]: With dead ends: 64542 [2021-12-22 11:53:16,830 INFO L226 Difference]: Without dead ends: 53940 [2021-12-22 11:53:16,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:53:16,856 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 485 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:16,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 986 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53940 states. [2021-12-22 11:53:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53940 to 52238. [2021-12-22 11:53:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52238 states, 52237 states have (on average 1.5455902904071825) internal successors, (80737), 52237 states have internal predecessors, (80737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52238 states to 52238 states and 80737 transitions. [2021-12-22 11:53:19,254 INFO L78 Accepts]: Start accepts. Automaton has 52238 states and 80737 transitions. Word has length 107 [2021-12-22 11:53:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:19,255 INFO L470 AbstractCegarLoop]: Abstraction has 52238 states and 80737 transitions. [2021-12-22 11:53:19,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 52238 states and 80737 transitions. [2021-12-22 11:53:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-22 11:53:19,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:19,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:19,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 11:53:19,257 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -910445921, now seen corresponding path program 1 times [2021-12-22 11:53:19,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:19,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397359350] [2021-12-22 11:53:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:19,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:53:19,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397359350] [2021-12-22 11:53:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397359350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:19,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:19,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:19,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925101018] [2021-12-22 11:53:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:19,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:19,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:19,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:19,293 INFO L87 Difference]: Start difference. First operand 52238 states and 80737 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:21,290 INFO L93 Difference]: Finished difference Result 85241 states and 132386 transitions. [2021-12-22 11:53:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:21,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-22 11:53:21,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:21,434 INFO L225 Difference]: With dead ends: 85241 [2021-12-22 11:53:21,435 INFO L226 Difference]: Without dead ends: 67855 [2021-12-22 11:53:21,479 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 [2021-12-22 11:53:21,481 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 208 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:21,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 715 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67855 states. [2021-12-22 11:53:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67855 to 66155. [2021-12-22 11:53:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66155 states, 66154 states have (on average 1.5456510566254498) internal successors, (102251), 66154 states have internal predecessors, (102251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66155 states to 66155 states and 102251 transitions. [2021-12-22 11:53:24,429 INFO L78 Accepts]: Start accepts. Automaton has 66155 states and 102251 transitions. Word has length 108 [2021-12-22 11:53:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:24,429 INFO L470 AbstractCegarLoop]: Abstraction has 66155 states and 102251 transitions. [2021-12-22 11:53:24,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66155 states and 102251 transitions. [2021-12-22 11:53:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-22 11:53:24,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:24,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:24,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 11:53:24,432 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -487744095, now seen corresponding path program 1 times [2021-12-22 11:53:24,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225875391] [2021-12-22 11:53:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:24,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:53:24,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:24,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225875391] [2021-12-22 11:53:24,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225875391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:24,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:24,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:24,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783634523] [2021-12-22 11:53:24,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:24,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:24,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:24,476 INFO L87 Difference]: Start difference. First operand 66155 states and 102251 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:28,150 INFO L93 Difference]: Finished difference Result 143009 states and 221699 transitions. [2021-12-22 11:53:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-22 11:53:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:28,400 INFO L225 Difference]: With dead ends: 143009 [2021-12-22 11:53:28,401 INFO L226 Difference]: Without dead ends: 111843 [2021-12-22 11:53:28,450 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 [2021-12-22 11:53:28,451 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 92 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:28,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111843 states.