./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d64f8292aca6df32fb4672436aa26b180650e8f6b53fd57d3a6fcdd53603ded8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:40:36,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:40:36,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:40:36,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:40:36,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:40:36,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:40:36,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:40:36,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:40:36,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:40:36,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:40:36,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:40:36,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:40:36,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:40:36,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:40:36,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:40:36,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:40:36,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:40:36,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:40:36,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:40:36,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:40:36,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:40:36,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:40:36,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:40:36,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:40:36,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:40:36,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:40:36,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:40:36,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:40:36,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:40:36,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:40:36,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:40:36,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:40:36,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:40:36,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:40:36,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:40:36,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:40:36,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:40:36,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:40:36,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:40:36,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:40:36,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:40:36,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:40:36,790 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:40:36,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:40:36,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:40:36,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:40:36,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:40:36,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:40:36,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:40:36,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:40:36,793 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:40:36,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:40:36,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:40:36,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:40:36,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:40:36,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:40:36,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:40:36,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:40:36,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:40:36,795 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:40:36,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:40:36,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:40:36,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:40:36,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:40:36,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:40:36,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:40:36,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:40:36,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:40:36,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:40:36,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:40:36,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:40:36,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:40:36,797 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:40:36,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:40:36,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:40:36,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:40:36,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d64f8292aca6df32fb4672436aa26b180650e8f6b53fd57d3a6fcdd53603ded8 [2021-12-21 13:40:37,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:40:37,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:40:37,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:40:37,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:40:37,041 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:40:37,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-21 13:40:37,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b599c7b/4e038f01d75c4212b6b7c8b51edc6d89/FLAGb604c6fcb [2021-12-21 13:40:37,627 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:40:37,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-21 13:40:37,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b599c7b/4e038f01d75c4212b6b7c8b51edc6d89/FLAGb604c6fcb [2021-12-21 13:40:37,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b599c7b/4e038f01d75c4212b6b7c8b51edc6d89 [2021-12-21 13:40:37,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:40:37,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:40:37,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:40:37,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:40:37,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:40:37,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:40:37" (1/1) ... [2021-12-21 13:40:37,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4052c5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:37, skipping insertion in model container [2021-12-21 13:40:37,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:40:37" (1/1) ... [2021-12-21 13:40:37,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:40:37,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:40:38,307 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21751,21764] [2021-12-21 13:40:38,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:40:38,464 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:40:38,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21751,21764] [2021-12-21 13:40:38,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:40:38,741 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:40:38,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38 WrapperNode [2021-12-21 13:40:38,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:40:38,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:40:38,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:40:38,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:40:38,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,864 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2773 [2021-12-21 13:40:38,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:40:38,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:40:38,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:40:38,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:40:38,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:38,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:40:38,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:40:38,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:40:38,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:40:38,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (1/1) ... [2021-12-21 13:40:39,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:40:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:40:39,029 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) [2021-12-21 13:40:39,050 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 [2021-12-21 13:40:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:40:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:40:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:40:39,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:40:39,266 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:40:39,280 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:40:40,723 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:40:40,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:40:40,740 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:40:40,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:40:40 BoogieIcfgContainer [2021-12-21 13:40:40,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:40:40,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:40:40,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:40:40,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:40:40,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:40:37" (1/3) ... [2021-12-21 13:40:40,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d4077f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:40:40, skipping insertion in model container [2021-12-21 13:40:40,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:38" (2/3) ... [2021-12-21 13:40:40,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d4077f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:40:40, skipping insertion in model container [2021-12-21 13:40:40,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:40:40" (3/3) ... [2021-12-21 13:40:40,750 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-21 13:40:40,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:40:40,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:40:40,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:40:40,810 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 [2021-12-21 13:40:40,811 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:40:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 736 states, 734 states have (on average 1.8419618528610355) internal successors, (1352), 735 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:40,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-21 13:40:40,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:40,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:40,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash -666845715, now seen corresponding path program 1 times [2021-12-21 13:40:40,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:40,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610017819] [2021-12-21 13:40:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:40,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:41,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610017819] [2021-12-21 13:40:41,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610017819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:41,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:41,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:41,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973019446] [2021-12-21 13:40:41,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:41,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:41,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:41,534 INFO L87 Difference]: Start difference. First operand has 736 states, 734 states have (on average 1.8419618528610355) internal successors, (1352), 735 states have internal predecessors, (1352), 0 states have call successors, (0), 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 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:41,711 INFO L93 Difference]: Finished difference Result 1109 states and 1983 transitions. [2021-12-21 13:40:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2021-12-21 13:40:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:41,738 INFO L225 Difference]: With dead ends: 1109 [2021-12-21 13:40:41,739 INFO L226 Difference]: Without dead ends: 910 [2021-12-21 13:40:41,747 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 [2021-12-21 13:40:41,751 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 339 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:41,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 2596 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-12-21 13:40:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 908. [2021-12-21 13:40:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.7420066152149944) internal successors, (1580), 907 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1580 transitions. [2021-12-21 13:40:41,853 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1580 transitions. Word has length 204 [2021-12-21 13:40:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1580 transitions. [2021-12-21 13:40:41,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1580 transitions. [2021-12-21 13:40:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-21 13:40:41,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:41,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:41,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:40:41,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:41,870 INFO L85 PathProgramCache]: Analyzing trace with hash 961374666, now seen corresponding path program 1 times [2021-12-21 13:40:41,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:41,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405025238] [2021-12-21 13:40:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:41,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:42,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:42,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405025238] [2021-12-21 13:40:42,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405025238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:42,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:42,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892612805] [2021-12-21 13:40:42,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:42,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:42,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:42,090 INFO L87 Difference]: Start difference. First operand 908 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:42,144 INFO L93 Difference]: Finished difference Result 1616 states and 2772 transitions. [2021-12-21 13:40:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-12-21 13:40:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:42,155 INFO L225 Difference]: With dead ends: 1616 [2021-12-21 13:40:42,156 INFO L226 Difference]: Without dead ends: 1251 [2021-12-21 13:40:42,163 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 [2021-12-21 13:40:42,165 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 292 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 2728 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 [2021-12-21 13:40:42,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 2728 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-12-21 13:40:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2021-12-21 13:40:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.7243589743589745) internal successors, (2152), 1248 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2152 transitions. [2021-12-21 13:40:42,238 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2152 transitions. Word has length 208 [2021-12-21 13:40:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:42,239 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 2152 transitions. [2021-12-21 13:40:42,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2152 transitions. [2021-12-21 13:40:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-21 13:40:42,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:42,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:42,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:40:42,245 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1204290054, now seen corresponding path program 1 times [2021-12-21 13:40:42,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:42,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681946882] [2021-12-21 13:40:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:42,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:42,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681946882] [2021-12-21 13:40:42,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681946882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:42,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:42,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:42,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051537898] [2021-12-21 13:40:42,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:42,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:42,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:42,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:42,403 INFO L87 Difference]: Start difference. First operand 1249 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:42,470 INFO L93 Difference]: Finished difference Result 1950 states and 3336 transitions. [2021-12-21 13:40:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-12-21 13:40:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:42,479 INFO L225 Difference]: With dead ends: 1950 [2021-12-21 13:40:42,479 INFO L226 Difference]: Without dead ends: 1585 [2021-12-21 13:40:42,481 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 [2021-12-21 13:40:42,486 INFO L933 BasicCegarLoop]: 1494 mSDtfsCounter, 293 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2736 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 [2021-12-21 13:40:42,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 2736 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-12-21 13:40:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1583. [2021-12-21 13:40:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 1.715549936788875) internal successors, (2714), 1582 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2714 transitions. [2021-12-21 13:40:42,563 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2714 transitions. Word has length 212 [2021-12-21 13:40:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:42,564 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 2714 transitions. [2021-12-21 13:40:42,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2714 transitions. [2021-12-21 13:40:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-21 13:40:42,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:42,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:42,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:40:42,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -640806259, now seen corresponding path program 1 times [2021-12-21 13:40:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:42,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823484790] [2021-12-21 13:40:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:42,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:42,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:42,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823484790] [2021-12-21 13:40:42,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823484790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:42,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:42,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:42,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895732611] [2021-12-21 13:40:42,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:42,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:42,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:42,672 INFO L87 Difference]: Start difference. First operand 1583 states and 2714 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:42,797 INFO L93 Difference]: Finished difference Result 3523 states and 5970 transitions. [2021-12-21 13:40:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-12-21 13:40:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:42,809 INFO L225 Difference]: With dead ends: 3523 [2021-12-21 13:40:42,809 INFO L226 Difference]: Without dead ends: 2520 [2021-12-21 13:40:42,812 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 [2021-12-21 13:40:42,818 INFO L933 BasicCegarLoop]: 1286 mSDtfsCounter, 285 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2522 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 [2021-12-21 13:40:42,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2522 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-12-21 13:40:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2518. [2021-12-21 13:40:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.697258641239571) internal successors, (4272), 2517 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 4272 transitions. [2021-12-21 13:40:42,925 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 4272 transitions. Word has length 212 [2021-12-21 13:40:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:42,925 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 4272 transitions. [2021-12-21 13:40:42,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 4272 transitions. [2021-12-21 13:40:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 13:40:42,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:42,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:42,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:40:42,931 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1656526890, now seen corresponding path program 1 times [2021-12-21 13:40:42,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617001046] [2021-12-21 13:40:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:42,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:43,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617001046] [2021-12-21 13:40:43,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617001046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:43,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:43,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:43,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722281717] [2021-12-21 13:40:43,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:43,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:43,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:43,046 INFO L87 Difference]: Start difference. First operand 2518 states and 4272 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:43,220 INFO L93 Difference]: Finished difference Result 6262 states and 10518 transitions. [2021-12-21 13:40:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-12-21 13:40:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:43,237 INFO L225 Difference]: With dead ends: 6262 [2021-12-21 13:40:43,238 INFO L226 Difference]: Without dead ends: 4324 [2021-12-21 13:40:43,242 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 [2021-12-21 13:40:43,242 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 278 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2638 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 [2021-12-21 13:40:43,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 2638 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:43,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-12-21 13:40:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 4322. [2021-12-21 13:40:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 1.6792409164545243) internal successors, (7256), 4321 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 7256 transitions. [2021-12-21 13:40:43,462 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 7256 transitions. Word has length 216 [2021-12-21 13:40:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:43,463 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 7256 transitions. [2021-12-21 13:40:43,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 7256 transitions. [2021-12-21 13:40:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 13:40:43,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:43,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:40:43,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash -759647818, now seen corresponding path program 1 times [2021-12-21 13:40:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355606873] [2021-12-21 13:40:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:43,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:43,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355606873] [2021-12-21 13:40:43,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355606873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:43,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:43,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:43,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862078289] [2021-12-21 13:40:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:43,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:43,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:43,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:43,562 INFO L87 Difference]: Start difference. First operand 4322 states and 7256 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:43,846 INFO L93 Difference]: Finished difference Result 7918 states and 13272 transitions. [2021-12-21 13:40:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-12-21 13:40:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:43,872 INFO L225 Difference]: With dead ends: 7918 [2021-12-21 13:40:43,872 INFO L226 Difference]: Without dead ends: 5980 [2021-12-21 13:40:43,880 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 [2021-12-21 13:40:43,882 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 279 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2645 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 [2021-12-21 13:40:43,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 2645 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-12-21 13:40:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 5978. [2021-12-21 13:40:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 1.674083988623055) internal successors, (10006), 5977 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 10006 transitions. [2021-12-21 13:40:44,178 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 10006 transitions. Word has length 220 [2021-12-21 13:40:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:44,179 INFO L470 AbstractCegarLoop]: Abstraction has 5978 states and 10006 transitions. [2021-12-21 13:40:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 10006 transitions. [2021-12-21 13:40:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 13:40:44,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:44,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:44,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:40:44,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:44,185 INFO L85 PathProgramCache]: Analyzing trace with hash -808960211, now seen corresponding path program 1 times [2021-12-21 13:40:44,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:44,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172317869] [2021-12-21 13:40:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:44,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:44,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172317869] [2021-12-21 13:40:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172317869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:44,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:44,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679845119] [2021-12-21 13:40:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:44,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:44,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:44,364 INFO L87 Difference]: Start difference. First operand 5978 states and 10006 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:44,872 INFO L93 Difference]: Finished difference Result 16146 states and 26844 transitions. [2021-12-21 13:40:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-12-21 13:40:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:44,930 INFO L225 Difference]: With dead ends: 16146 [2021-12-21 13:40:44,931 INFO L226 Difference]: Without dead ends: 10864 [2021-12-21 13:40:44,944 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 [2021-12-21 13:40:44,946 INFO L933 BasicCegarLoop]: 1287 mSDtfsCounter, 271 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2525 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 [2021-12-21 13:40:44,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 2525 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2021-12-21 13:40:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 10862. [2021-12-21 13:40:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10862 states, 10861 states have (on average 1.658226682625909) internal successors, (18010), 10861 states have internal predecessors, (18010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 18010 transitions. [2021-12-21 13:40:45,484 INFO L78 Accepts]: Start accepts. Automaton has 10862 states and 18010 transitions. Word has length 220 [2021-12-21 13:40:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:45,484 INFO L470 AbstractCegarLoop]: Abstraction has 10862 states and 18010 transitions. [2021-12-21 13:40:45,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10862 states and 18010 transitions. [2021-12-21 13:40:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-21 13:40:45,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:45,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:45,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:40:45,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1627459958, now seen corresponding path program 1 times [2021-12-21 13:40:45,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:45,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372867937] [2021-12-21 13:40:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:45,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:45,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372867937] [2021-12-21 13:40:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372867937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:45,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:45,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:40:45,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967842466] [2021-12-21 13:40:45,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:45,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:40:45,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:40:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:40:45,674 INFO L87 Difference]: Start difference. First operand 10862 states and 18010 transitions. Second operand has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:49,103 INFO L93 Difference]: Finished difference Result 73998 states and 123151 transitions. [2021-12-21 13:40:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:40:49,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-12-21 13:40:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:49,353 INFO L225 Difference]: With dead ends: 73998 [2021-12-21 13:40:49,354 INFO L226 Difference]: Without dead ends: 63832 [2021-12-21 13:40:49,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:40:49,402 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 4553 mSDsluCounter, 9084 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 10357 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:49,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 10357 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:40:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63832 states. [2021-12-21 13:40:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63832 to 20817. [2021-12-21 13:40:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20817 states, 20816 states have (on average 1.6534877017678709) internal successors, (34419), 20816 states have internal predecessors, (34419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20817 states to 20817 states and 34419 transitions. [2021-12-21 13:40:51,610 INFO L78 Accepts]: Start accepts. Automaton has 20817 states and 34419 transitions. Word has length 224 [2021-12-21 13:40:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:51,612 INFO L470 AbstractCegarLoop]: Abstraction has 20817 states and 34419 transitions. [2021-12-21 13:40:51,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20817 states and 34419 transitions. [2021-12-21 13:40:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-21 13:40:51,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:51,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:51,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:40:51,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1016729105, now seen corresponding path program 1 times [2021-12-21 13:40:51,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302738822] [2021-12-21 13:40:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:51,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:51,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302738822] [2021-12-21 13:40:51,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302738822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:51,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:51,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:40:51,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037243275] [2021-12-21 13:40:51,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:51,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:40:51,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:51,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:40:51,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:40:51,742 INFO L87 Difference]: Start difference. First operand 20817 states and 34419 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:54,409 INFO L93 Difference]: Finished difference Result 61920 states and 102779 transitions. [2021-12-21 13:40:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:40:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-21 13:40:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:54,512 INFO L225 Difference]: With dead ends: 61920 [2021-12-21 13:40:54,513 INFO L226 Difference]: Without dead ends: 41861 [2021-12-21 13:40:54,564 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 [2021-12-21 13:40:54,566 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 939 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 3902 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:54,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 3902 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41861 states. [2021-12-21 13:40:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41861 to 31296. [2021-12-21 13:40:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31296 states, 31295 states have (on average 1.655376258188209) internal successors, (51805), 31295 states have internal predecessors, (51805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31296 states to 31296 states and 51805 transitions. [2021-12-21 13:40:56,864 INFO L78 Accepts]: Start accepts. Automaton has 31296 states and 51805 transitions. Word has length 225 [2021-12-21 13:40:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 31296 states and 51805 transitions. [2021-12-21 13:40:56,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31296 states and 51805 transitions. [2021-12-21 13:40:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-21 13:40:56,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:56,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:40:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:40:56,873 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1804910714, now seen corresponding path program 1 times [2021-12-21 13:40:56,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:56,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658424123] [2021-12-21 13:40:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:56,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:56,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:56,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658424123] [2021-12-21 13:40:56,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658424123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:56,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:56,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:56,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172189770] [2021-12-21 13:40:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:56,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:56,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:56,990 INFO L87 Difference]: Start difference. First operand 31296 states and 51805 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:59,907 INFO L93 Difference]: Finished difference Result 59898 states and 99327 transitions. [2021-12-21 13:40:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:59,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-21 13:40:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:41:00,090 INFO L225 Difference]: With dead ends: 59898 [2021-12-21 13:41:00,090 INFO L226 Difference]: Without dead ends: 43930 [2021-12-21 13:41:00,120 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 [2021-12-21 13:41:00,121 INFO L933 BasicCegarLoop]: 1367 mSDtfsCounter, 272 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2612 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 [2021-12-21 13:41:00,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 2612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:41:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43930 states. [2021-12-21 13:41:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43930 to 43928. [2021-12-21 13:41:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43928 states, 43927 states have (on average 1.6528103444350855) internal successors, (72603), 43927 states have internal predecessors, (72603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:41:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43928 states to 43928 states and 72603 transitions. [2021-12-21 13:41:03,254 INFO L78 Accepts]: Start accepts. Automaton has 43928 states and 72603 transitions. Word has length 225 [2021-12-21 13:41:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:41:03,255 INFO L470 AbstractCegarLoop]: Abstraction has 43928 states and 72603 transitions. [2021-12-21 13:41:03,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:41:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 43928 states and 72603 transitions. [2021-12-21 13:41:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-21 13:41:03,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:41:03,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:41:03,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:41:03,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:41:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:41:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1252454586, now seen corresponding path program 1 times [2021-12-21 13:41:03,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:41:03,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078311667] [2021-12-21 13:41:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:41:03,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:41:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:41:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:41:03,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:41:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078311667] [2021-12-21 13:41:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078311667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:41:03,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:41:03,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:41:03,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158192872] [2021-12-21 13:41:03,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:41:03,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:41:03,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:41:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:41:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:41:03,376 INFO L87 Difference]: Start difference. First operand 43928 states and 72603 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:41:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:41:07,457 INFO L93 Difference]: Finished difference Result 83514 states and 138377 transitions. [2021-12-21 13:41:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:41:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-21 13:41:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:41:07,580 INFO L225 Difference]: With dead ends: 83514 [2021-12-21 13:41:07,580 INFO L226 Difference]: Without dead ends: 60858 [2021-12-21 13:41:07,614 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 [2021-12-21 13:41:07,615 INFO L933 BasicCegarLoop]: 1459 mSDtfsCounter, 286 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2702 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 [2021-12-21 13:41:07,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2702 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:41:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60858 states. [2021-12-21 13:41:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60858 to 60856. [2021-12-21 13:41:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60856 states, 60855 states have (on average 1.651220113384274) internal successors, (100485), 60855 states have internal predecessors, (100485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:41:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60856 states to 60856 states and 100485 transitions. [2021-12-21 13:41:11,925 INFO L78 Accepts]: Start accepts. Automaton has 60856 states and 100485 transitions. Word has length 225 [2021-12-21 13:41:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:41:11,927 INFO L470 AbstractCegarLoop]: Abstraction has 60856 states and 100485 transitions. [2021-12-21 13:41:11,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:41:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 60856 states and 100485 transitions. [2021-12-21 13:41:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-21 13:41:11,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:41:11,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:41:11,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:41:11,931 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:41:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:41:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1749864198, now seen corresponding path program 1 times [2021-12-21 13:41:11,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:41:11,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996815162] [2021-12-21 13:41:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:41:11,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:41:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:41:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:41:12,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:41:12,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996815162] [2021-12-21 13:41:12,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996815162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:41:12,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:41:12,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:41:12,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080313933] [2021-12-21 13:41:12,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:41:12,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:41:12,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:41:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:41:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:41:12,200 INFO L87 Difference]: Start difference. First operand 60856 states and 100485 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)