./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.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 6594a781eb15fb7bc8687ba7c7eec87d2c3a5aadf0390114ddcc686f9488f6df --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:06:17,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:06:17,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:06:17,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:06:17,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:06:17,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:06:17,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:06:17,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:06:17,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:06:17,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:06:17,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:06:17,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:06:17,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:06:17,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:06:17,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:06:17,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:06:17,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:06:17,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:06:17,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:06:17,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:06:17,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:06:17,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:06:17,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:06:17,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:06:17,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:06:17,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:06:17,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:06:17,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:06:17,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:06:17,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:06:17,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:06:17,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:06:17,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:06:17,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:06:17,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:06:17,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:06:17,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:06:17,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:06:17,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:06:17,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:06:17,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:06:17,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:06:17,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:06:17,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:06:17,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:06:17,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:06:17,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:06:17,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:06:17,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:06:17,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:06:17,956 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:06:17,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:06:17,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:06:17,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:06:17,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:06:17,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:06:17,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:06:17,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:06:17,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:06:17,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:06:17,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:06:17,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:06:17,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:06:17,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:06:17,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:06:17,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:06:17,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:06:17,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:06:17,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:06:17,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:06:17,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6594a781eb15fb7bc8687ba7c7eec87d2c3a5aadf0390114ddcc686f9488f6df [2021-12-22 13:06:18,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:06:18,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:06:18,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:06:18,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:06:18,125 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:06:18,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-22 13:06:18,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20dbb74ac/8dccbc7ab5eb49e09089844864386def/FLAGfba4e48a5 [2021-12-22 13:06:18,641 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:06:18,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-22 13:06:18,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20dbb74ac/8dccbc7ab5eb49e09089844864386def/FLAGfba4e48a5 [2021-12-22 13:06:18,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20dbb74ac/8dccbc7ab5eb49e09089844864386def [2021-12-22 13:06:18,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:06:18,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:06:18,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:06:18,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:06:18,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:06:18,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:06:18" (1/1) ... [2021-12-22 13:06:18,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41042e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:18, skipping insertion in model container [2021-12-22 13:06:18,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:06:18" (1/1) ... [2021-12-22 13:06:18,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:06:19,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:06:19,295 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/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c[20454,20467] [2021-12-22 13:06:19,325 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/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c[27515,27528] [2021-12-22 13:06:19,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:06:19,799 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:06:19,835 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/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c[20454,20467] [2021-12-22 13:06:19,846 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/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c[27515,27528] [2021-12-22 13:06:20,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:06:20,150 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:06:20,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20 WrapperNode [2021-12-22 13:06:20,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:06:20,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:06:20,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:06:20,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:06:20,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,470 INFO L137 Inliner]: procedures = 39, calls = 24, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5208 [2021-12-22 13:06:20,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:06:20,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:06:20,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:06:20,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:06:20,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:06:20,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:06:20,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:06:20,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:06:20,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (1/1) ... [2021-12-22 13:06:20,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:06:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:06:20,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:06:20,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:06:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:06:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:06:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:06:20,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:06:21,077 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:06:21,078 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:06:23,870 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:06:23,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:06:23,882 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:06:23,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:06:23 BoogieIcfgContainer [2021-12-22 13:06:23,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:06:23,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:06:23,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:06:23,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:06:23,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:06:18" (1/3) ... [2021-12-22 13:06:23,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa9c3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:06:23, skipping insertion in model container [2021-12-22 13:06:23,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:06:20" (2/3) ... [2021-12-22 13:06:23,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa9c3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:06:23, skipping insertion in model container [2021-12-22 13:06:23,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:06:23" (3/3) ... [2021-12-22 13:06:23,891 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-22 13:06:23,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:06:23,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:06:23,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:06:23,927 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:06:23,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:06:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 946 states, 943 states have (on average 1.8971367974549311) internal successors, (1789), 945 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 13:06:23,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:23,951 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] [2021-12-22 13:06:23,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2021-12-22 13:06:23,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:23,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820358316] [2021-12-22 13:06:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:23,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:24,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:24,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820358316] [2021-12-22 13:06:24,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820358316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:24,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:24,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:06:24,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016199940] [2021-12-22 13:06:24,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:06:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:06:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:06:24,105 INFO L87 Difference]: Start difference. First operand has 946 states, 943 states have (on average 1.8971367974549311) internal successors, (1789), 945 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:24,209 INFO L93 Difference]: Finished difference Result 1834 states and 3468 transitions. [2021-12-22 13:06:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:06:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-22 13:06:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:24,238 INFO L225 Difference]: With dead ends: 1834 [2021-12-22 13:06:24,238 INFO L226 Difference]: Without dead ends: 880 [2021-12-22 13:06:24,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:06:24,245 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:24,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-12-22 13:06:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2021-12-22 13:06:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 878 states have (on average 1.8861047835990887) internal successors, (1656), 879 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1656 transitions. [2021-12-22 13:06:24,311 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1656 transitions. Word has length 42 [2021-12-22 13:06:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:24,311 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1656 transitions. [2021-12-22 13:06:24,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1656 transitions. [2021-12-22 13:06:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 13:06:24,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:24,313 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] [2021-12-22 13:06:24,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:06:24,314 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2021-12-22 13:06:24,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014632632] [2021-12-22 13:06:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:24,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:24,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014632632] [2021-12-22 13:06:24,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014632632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:24,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:24,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:06:24,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487936000] [2021-12-22 13:06:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:24,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:06:24,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:06:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:06:24,374 INFO L87 Difference]: Start difference. First operand 880 states and 1656 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:24,460 INFO L93 Difference]: Finished difference Result 954 states and 1771 transitions. [2021-12-22 13:06:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:06:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-22 13:06:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:24,463 INFO L225 Difference]: With dead ends: 954 [2021-12-22 13:06:24,463 INFO L226 Difference]: Without dead ends: 880 [2021-12-22 13:06:24,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:06:24,469 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 3 mSDsluCounter, 4909 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6563 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:24,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6563 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-12-22 13:06:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2021-12-22 13:06:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 878 states have (on average 1.8291571753986333) internal successors, (1606), 879 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1606 transitions. [2021-12-22 13:06:24,495 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1606 transitions. Word has length 42 [2021-12-22 13:06:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:24,495 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1606 transitions. [2021-12-22 13:06:24,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1606 transitions. [2021-12-22 13:06:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 13:06:24,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:24,499 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] [2021-12-22 13:06:24,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:06:24,499 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash 978466368, now seen corresponding path program 1 times [2021-12-22 13:06:24,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:24,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339284568] [2021-12-22 13:06:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:24,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:24,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:24,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339284568] [2021-12-22 13:06:24,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339284568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:24,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:24,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:06:24,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644278053] [2021-12-22 13:06:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:24,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:24,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:24,591 INFO L87 Difference]: Start difference. First operand 880 states and 1606 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:27,235 INFO L93 Difference]: Finished difference Result 2384 states and 4479 transitions. [2021-12-22 13:06:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-22 13:06:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:27,241 INFO L225 Difference]: With dead ends: 2384 [2021-12-22 13:06:27,242 INFO L226 Difference]: Without dead ends: 1631 [2021-12-22 13:06:27,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,243 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 907 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:27,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 642 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 13:06:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-12-22 13:06:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1631. [2021-12-22 13:06:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1629 states have (on average 1.5868631062001228) internal successors, (2585), 1630 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2585 transitions. [2021-12-22 13:06:27,269 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2585 transitions. Word has length 61 [2021-12-22 13:06:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:27,269 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2585 transitions. [2021-12-22 13:06:27,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2585 transitions. [2021-12-22 13:06:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:06:27,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:27,271 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] [2021-12-22 13:06:27,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:06:27,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2021-12-22 13:06:27,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:27,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708096386] [2021-12-22 13:06:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:27,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:27,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:27,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708096386] [2021-12-22 13:06:27,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708096386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:27,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:27,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:27,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615116334] [2021-12-22 13:06:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:27,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:27,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,335 INFO L87 Difference]: Start difference. First operand 1631 states and 2585 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:27,364 INFO L93 Difference]: Finished difference Result 1765 states and 2797 transitions. [2021-12-22 13:06:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 13:06:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:27,371 INFO L225 Difference]: With dead ends: 1765 [2021-12-22 13:06:27,371 INFO L226 Difference]: Without dead ends: 1695 [2021-12-22 13:06:27,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,373 INFO L933 BasicCegarLoop]: 1674 mSDtfsCounter, 1532 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:27,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1532 Valid, 1791 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-12-22 13:06:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1693. [2021-12-22 13:06:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1691 states have (on average 1.5872264931992903) internal successors, (2684), 1692 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2684 transitions. [2021-12-22 13:06:27,397 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2684 transitions. Word has length 91 [2021-12-22 13:06:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:27,398 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 2684 transitions. [2021-12-22 13:06:27,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2684 transitions. [2021-12-22 13:06:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:06:27,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:27,400 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] [2021-12-22 13:06:27,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:06:27,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2021-12-22 13:06:27,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841475929] [2021-12-22 13:06:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:27,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:27,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841475929] [2021-12-22 13:06:27,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841475929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:27,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:27,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:27,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542699925] [2021-12-22 13:06:27,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:27,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:27,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,449 INFO L87 Difference]: Start difference. First operand 1693 states and 2684 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:27,473 INFO L93 Difference]: Finished difference Result 1945 states and 3084 transitions. [2021-12-22 13:06:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:27,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 13:06:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:27,478 INFO L225 Difference]: With dead ends: 1945 [2021-12-22 13:06:27,479 INFO L226 Difference]: Without dead ends: 1813 [2021-12-22 13:06:27,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,480 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 1528 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:27,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 1790 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-12-22 13:06:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1811. [2021-12-22 13:06:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1809 states have (on average 1.5870646766169154) internal successors, (2871), 1810 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2871 transitions. [2021-12-22 13:06:27,504 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2871 transitions. Word has length 91 [2021-12-22 13:06:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:27,506 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2871 transitions. [2021-12-22 13:06:27,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2871 transitions. [2021-12-22 13:06:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:06:27,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:27,508 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] [2021-12-22 13:06:27,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:06:27,508 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2021-12-22 13:06:27,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:27,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773189596] [2021-12-22 13:06:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:27,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:27,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773189596] [2021-12-22 13:06:27,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773189596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:27,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:27,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:27,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422869049] [2021-12-22 13:06:27,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:27,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:27,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,570 INFO L87 Difference]: Start difference. First operand 1811 states and 2871 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:27,597 INFO L93 Difference]: Finished difference Result 2287 states and 3625 transitions. [2021-12-22 13:06:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 13:06:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:27,603 INFO L225 Difference]: With dead ends: 2287 [2021-12-22 13:06:27,603 INFO L226 Difference]: Without dead ends: 2037 [2021-12-22 13:06:27,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,606 INFO L933 BasicCegarLoop]: 1664 mSDtfsCounter, 1524 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:27,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1789 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-12-22 13:06:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 2035. [2021-12-22 13:06:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2033 states have (on average 1.5853418593212) internal successors, (3223), 2034 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3223 transitions. [2021-12-22 13:06:27,640 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3223 transitions. Word has length 91 [2021-12-22 13:06:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:27,641 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 3223 transitions. [2021-12-22 13:06:27,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3223 transitions. [2021-12-22 13:06:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:06:27,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:27,642 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] [2021-12-22 13:06:27,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:06:27,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2021-12-22 13:06:27,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:27,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064913874] [2021-12-22 13:06:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:27,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:27,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064913874] [2021-12-22 13:06:27,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064913874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:27,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:27,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:27,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236983275] [2021-12-22 13:06:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:27,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:27,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,688 INFO L87 Difference]: Start difference. First operand 2035 states and 3223 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:27,721 INFO L93 Difference]: Finished difference Result 2935 states and 4641 transitions. [2021-12-22 13:06:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 13:06:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:27,728 INFO L225 Difference]: With dead ends: 2935 [2021-12-22 13:06:27,728 INFO L226 Difference]: Without dead ends: 2461 [2021-12-22 13:06:27,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,729 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1520 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:27,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1788 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-12-22 13:06:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2459. [2021-12-22 13:06:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2457 states have (on average 1.5803825803825804) internal successors, (3883), 2458 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 3883 transitions. [2021-12-22 13:06:27,810 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 3883 transitions. Word has length 91 [2021-12-22 13:06:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:27,811 INFO L470 AbstractCegarLoop]: Abstraction has 2459 states and 3883 transitions. [2021-12-22 13:06:27,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 3883 transitions. [2021-12-22 13:06:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:06:27,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:27,812 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] [2021-12-22 13:06:27,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:06:27,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2021-12-22 13:06:27,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:27,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774321374] [2021-12-22 13:06:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:27,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:27,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:27,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774321374] [2021-12-22 13:06:27,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774321374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:27,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:27,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:27,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295066012] [2021-12-22 13:06:27,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:27,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:27,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,845 INFO L87 Difference]: Start difference. First operand 2459 states and 3883 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:27,894 INFO L93 Difference]: Finished difference Result 4159 states and 6541 transitions. [2021-12-22 13:06:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 13:06:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:27,904 INFO L225 Difference]: With dead ends: 4159 [2021-12-22 13:06:27,904 INFO L226 Difference]: Without dead ends: 3261 [2021-12-22 13:06:27,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:27,906 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 1516 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:27,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1787 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-12-22 13:06:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3259. [2021-12-22 13:06:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3257 states have (on average 1.5704636168252994) internal successors, (5115), 3258 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 5115 transitions. [2021-12-22 13:06:27,972 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 5115 transitions. Word has length 91 [2021-12-22 13:06:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:27,972 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 5115 transitions. [2021-12-22 13:06:27,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 5115 transitions. [2021-12-22 13:06:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:06:27,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:27,973 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] [2021-12-22 13:06:27,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:06:27,973 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2021-12-22 13:06:27,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:27,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514552922] [2021-12-22 13:06:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:27,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:28,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514552922] [2021-12-22 13:06:28,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514552922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:28,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:28,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:06:28,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688681699] [2021-12-22 13:06:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:28,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:06:28,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:06:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:06:28,041 INFO L87 Difference]: Start difference. First operand 3259 states and 5115 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:29,010 INFO L93 Difference]: Finished difference Result 27031 states and 42089 transitions. [2021-12-22 13:06:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:06:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 13:06:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:29,069 INFO L225 Difference]: With dead ends: 27031 [2021-12-22 13:06:29,070 INFO L226 Difference]: Without dead ends: 25333 [2021-12-22 13:06:29,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:06:29,082 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 12616 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12616 SdHoareTripleChecker+Valid, 4108 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:29,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12616 Valid, 4108 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:06:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25333 states. [2021-12-22 13:06:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25333 to 4955. [2021-12-22 13:06:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4953 states have (on average 1.5527962850797496) internal successors, (7691), 4954 states have internal predecessors, (7691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 7691 transitions. [2021-12-22 13:06:29,692 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 7691 transitions. Word has length 91 [2021-12-22 13:06:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:29,692 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 7691 transitions. [2021-12-22 13:06:29,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 7691 transitions. [2021-12-22 13:06:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:06:29,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:29,693 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] [2021-12-22 13:06:29,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:06:29,693 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2021-12-22 13:06:29,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:29,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144152821] [2021-12-22 13:06:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:29,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:29,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144152821] [2021-12-22 13:06:29,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144152821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:29,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:29,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:29,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887944340] [2021-12-22 13:06:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:29,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:29,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:29,733 INFO L87 Difference]: Start difference. First operand 4955 states and 7691 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:30,129 INFO L93 Difference]: Finished difference Result 11391 states and 17517 transitions. [2021-12-22 13:06:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-22 13:06:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:30,141 INFO L225 Difference]: With dead ends: 11391 [2021-12-22 13:06:30,141 INFO L226 Difference]: Without dead ends: 7997 [2021-12-22 13:06:30,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:30,145 INFO L933 BasicCegarLoop]: 1602 mSDtfsCounter, 1507 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:30,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1706 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7997 states. [2021-12-22 13:06:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7997 to 7931. [2021-12-22 13:06:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7929 states have (on average 1.522890654559213) internal successors, (12075), 7930 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 12075 transitions. [2021-12-22 13:06:30,590 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 12075 transitions. Word has length 93 [2021-12-22 13:06:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:30,591 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 12075 transitions. [2021-12-22 13:06:30,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 12075 transitions. [2021-12-22 13:06:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:06:30,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:30,593 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] [2021-12-22 13:06:30,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:06:30,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2021-12-22 13:06:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37133410] [2021-12-22 13:06:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:30,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:30,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37133410] [2021-12-22 13:06:30,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37133410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:30,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:30,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:06:30,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225726439] [2021-12-22 13:06:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:30,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:06:30,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:06:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:06:30,850 INFO L87 Difference]: Start difference. First operand 7931 states and 12075 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:31,461 INFO L93 Difference]: Finished difference Result 14303 states and 21677 transitions. [2021-12-22 13:06:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:06:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-22 13:06:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:31,472 INFO L225 Difference]: With dead ends: 14303 [2021-12-22 13:06:31,472 INFO L226 Difference]: Without dead ends: 7933 [2021-12-22 13:06:31,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:06:31,478 INFO L933 BasicCegarLoop]: 1644 mSDtfsCounter, 10977 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10977 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:31,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10977 Valid, 2292 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:06:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2021-12-22 13:06:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 7931. [2021-12-22 13:06:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7929 states have (on average 1.514819018791777) internal successors, (12011), 7930 states have internal predecessors, (12011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 12011 transitions. [2021-12-22 13:06:31,818 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 12011 transitions. Word has length 93 [2021-12-22 13:06:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:31,818 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 12011 transitions. [2021-12-22 13:06:31,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 12011 transitions. [2021-12-22 13:06:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:06:31,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:31,819 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] [2021-12-22 13:06:31,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:06:31,820 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2021-12-22 13:06:31,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:31,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017834259] [2021-12-22 13:06:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:31,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:31,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017834259] [2021-12-22 13:06:31,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017834259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:31,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:31,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:31,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441856021] [2021-12-22 13:06:31,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:31,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:31,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:31,849 INFO L87 Difference]: Start difference. First operand 7931 states and 12011 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:32,437 INFO L93 Difference]: Finished difference Result 19903 states and 29805 transitions. [2021-12-22 13:06:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:32,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-22 13:06:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:32,458 INFO L225 Difference]: With dead ends: 19903 [2021-12-22 13:06:32,459 INFO L226 Difference]: Without dead ends: 13533 [2021-12-22 13:06:32,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:32,468 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 1536 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:32,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 1801 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13533 states. [2021-12-22 13:06:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13533 to 13531. [2021-12-22 13:06:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13531 states, 13529 states have (on average 1.4885800872200459) internal successors, (20139), 13530 states have internal predecessors, (20139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13531 states to 13531 states and 20139 transitions. [2021-12-22 13:06:33,196 INFO L78 Accepts]: Start accepts. Automaton has 13531 states and 20139 transitions. Word has length 93 [2021-12-22 13:06:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:33,196 INFO L470 AbstractCegarLoop]: Abstraction has 13531 states and 20139 transitions. [2021-12-22 13:06:33,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13531 states and 20139 transitions. [2021-12-22 13:06:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-22 13:06:33,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:33,197 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] [2021-12-22 13:06:33,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:06:33,198 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2021-12-22 13:06:33,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:33,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713962555] [2021-12-22 13:06:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:33,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:33,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:33,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713962555] [2021-12-22 13:06:33,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713962555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:33,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:33,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:06:33,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054385787] [2021-12-22 13:06:33,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:33,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:06:33,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:06:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:06:33,276 INFO L87 Difference]: Start difference. First operand 13531 states and 20139 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:34,573 INFO L93 Difference]: Finished difference Result 22401 states and 33051 transitions. [2021-12-22 13:06:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:06:34,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-22 13:06:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:34,607 INFO L225 Difference]: With dead ends: 22401 [2021-12-22 13:06:34,608 INFO L226 Difference]: Without dead ends: 22399 [2021-12-22 13:06:34,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:06:34,615 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 801 mSDsluCounter, 9281 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 10940 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:34,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 10940 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22399 states. [2021-12-22 13:06:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22399 to 13915. [2021-12-22 13:06:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13915 states, 13913 states have (on average 1.4704952202975634) internal successors, (20459), 13914 states have internal predecessors, (20459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13915 states to 13915 states and 20459 transitions. [2021-12-22 13:06:35,479 INFO L78 Accepts]: Start accepts. Automaton has 13915 states and 20459 transitions. Word has length 94 [2021-12-22 13:06:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:35,479 INFO L470 AbstractCegarLoop]: Abstraction has 13915 states and 20459 transitions. [2021-12-22 13:06:35,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 13915 states and 20459 transitions. [2021-12-22 13:06:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:06:35,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:35,480 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] [2021-12-22 13:06:35,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:06:35,481 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2021-12-22 13:06:35,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396267182] [2021-12-22 13:06:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:35,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:06:35,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396267182] [2021-12-22 13:06:35,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396267182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:35,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:35,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:06:35,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609213622] [2021-12-22 13:06:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:35,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:06:35,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:06:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:35,521 INFO L87 Difference]: Start difference. First operand 13915 states and 20459 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:36,517 INFO L93 Difference]: Finished difference Result 26466 states and 38897 transitions. [2021-12-22 13:06:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:06:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-22 13:06:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:36,550 INFO L225 Difference]: With dead ends: 26466 [2021-12-22 13:06:36,551 INFO L226 Difference]: Without dead ends: 19679 [2021-12-22 13:06:36,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:06:36,561 INFO L933 BasicCegarLoop]: 1696 mSDtfsCounter, 1537 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:36,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1805 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:06:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19679 states. [2021-12-22 13:06:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19679 to 19677. [2021-12-22 13:06:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19677 states, 19675 states have (on average 1.4595679796696315) internal successors, (28717), 19676 states have internal predecessors, (28717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19677 states to 19677 states and 28717 transitions. [2021-12-22 13:06:37,713 INFO L78 Accepts]: Start accepts. Automaton has 19677 states and 28717 transitions. Word has length 95 [2021-12-22 13:06:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:37,713 INFO L470 AbstractCegarLoop]: Abstraction has 19677 states and 28717 transitions. [2021-12-22 13:06:37,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 19677 states and 28717 transitions. [2021-12-22 13:06:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 13:06:37,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:37,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:06:37,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:06:37,721 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1202553482, now seen corresponding path program 1 times [2021-12-22 13:06:37,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:37,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453851081] [2021-12-22 13:06:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:37,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 13:06:37,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453851081] [2021-12-22 13:06:37,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453851081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:37,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:37,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:06:37,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964502922] [2021-12-22 13:06:37,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:37,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:06:37,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:06:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:06:37,805 INFO L87 Difference]: Start difference. First operand 19677 states and 28717 transitions. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:06:45,822 INFO L93 Difference]: Finished difference Result 149997 states and 217333 transitions. [2021-12-22 13:06:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:06:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 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 130 [2021-12-22 13:06:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:06:46,080 INFO L225 Difference]: With dead ends: 149997 [2021-12-22 13:06:46,081 INFO L226 Difference]: Without dead ends: 131883 [2021-12-22 13:06:46,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:06:46,127 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 10879 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10879 SdHoareTripleChecker+Valid, 4136 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:06:46,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10879 Valid, 4136 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:06:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131883 states. [2021-12-22 13:06:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131883 to 37789. [2021-12-22 13:06:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37789 states, 37787 states have (on average 1.4493079630560775) internal successors, (54765), 37788 states have internal predecessors, (54765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37789 states to 37789 states and 54765 transitions. [2021-12-22 13:06:49,659 INFO L78 Accepts]: Start accepts. Automaton has 37789 states and 54765 transitions. Word has length 130 [2021-12-22 13:06:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:06:49,659 INFO L470 AbstractCegarLoop]: Abstraction has 37789 states and 54765 transitions. [2021-12-22 13:06:49,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:06:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 37789 states and 54765 transitions. [2021-12-22 13:06:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 13:06:49,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:06:49,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:06:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:06:49,669 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:06:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:06:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash -566229334, now seen corresponding path program 1 times [2021-12-22 13:06:49,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:06:49,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375950052] [2021-12-22 13:06:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:06:49,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:06:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:06:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:06:49,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:06:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375950052] [2021-12-22 13:06:49,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375950052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:06:49,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:06:49,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:06:49,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372524266] [2021-12-22 13:06:49,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:06:49,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:06:49,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:06:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:06:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:06:49,749 INFO L87 Difference]: Start difference. First operand 37789 states and 54765 transitions. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:07:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:07:00,158 INFO L93 Difference]: Finished difference Result 168109 states and 243381 transitions. [2021-12-22 13:07:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:07:00,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 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 130 [2021-12-22 13:07:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:07:00,370 INFO L225 Difference]: With dead ends: 168109 [2021-12-22 13:07:00,370 INFO L226 Difference]: Without dead ends: 149995 [2021-12-22 13:07:00,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:07:00,418 INFO L933 BasicCegarLoop]: 1710 mSDtfsCounter, 10608 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10608 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:07:00,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10608 Valid, 4240 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:07:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149995 states. [2021-12-22 13:07:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149995 to 64989. [2021-12-22 13:07:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64989 states, 64987 states have (on average 1.4414729099666086) internal successors, (93677), 64988 states have internal predecessors, (93677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:07:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64989 states to 64989 states and 93677 transitions. [2021-12-22 13:07:06,328 INFO L78 Accepts]: Start accepts. Automaton has 64989 states and 93677 transitions. Word has length 130 [2021-12-22 13:07:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:07:06,328 INFO L470 AbstractCegarLoop]: Abstraction has 64989 states and 93677 transitions. [2021-12-22 13:07:06,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:07:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 64989 states and 93677 transitions. [2021-12-22 13:07:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 13:07:06,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:07:06,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:07:06,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:07:06,339 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:07:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:07:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 565410506, now seen corresponding path program 1 times [2021-12-22 13:07:06,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:07:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823464480] [2021-12-22 13:07:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:07:06,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:07:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:07:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:07:06,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:07:06,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823464480] [2021-12-22 13:07:06,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823464480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:07:06,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:07:06,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:07:06,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871580251] [2021-12-22 13:07:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:07:06,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:07:06,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:07:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:07:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:07:06,411 INFO L87 Difference]: Start difference. First operand 64989 states and 93677 transitions. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:07:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:07:18,676 INFO L93 Difference]: Finished difference Result 186221 states and 269429 transitions. [2021-12-22 13:07:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:07:18,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 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 130 [2021-12-22 13:07:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:07:18,915 INFO L225 Difference]: With dead ends: 186221 [2021-12-22 13:07:18,915 INFO L226 Difference]: Without dead ends: 168107 [2021-12-22 13:07:18,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:07:18,950 INFO L933 BasicCegarLoop]: 1710 mSDtfsCounter, 10515 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10515 SdHoareTripleChecker+Valid, 4296 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:07:18,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10515 Valid, 4296 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:07:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168107 states.