./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_k.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/loop-new/count_by_k.i -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 ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:39:21,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:39:21,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:39:21,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:39:21,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:39:21,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:39:21,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:39:21,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:39:21,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:39:21,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:39:21,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:39:21,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:39:21,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:39:21,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:39:21,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:39:21,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:39:21,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:39:21,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:39:21,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:39:21,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:39:21,866 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:39:21,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:39:21,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:39:21,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:39:21,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:39:21,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:39:21,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:39:21,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:39:21,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:39:21,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:39:21,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:39:21,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:39:21,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:39:21,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:39:21,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:39:21,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:39:21,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:39:21,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:39:21,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:39:21,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:39:21,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:39:21,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:39:21,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:39:21,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:39:21,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:39:21,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:39:21,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:39:21,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:39:21,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:39:21,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:39:21,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:39:21,925 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:39:21,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:39:21,926 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:39:21,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:39:21,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:39:21,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:39:21,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:39:21,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:39:21,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:39:21,928 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:39:21,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:39:21,928 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:39:21,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:39:21,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:39:21,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:39:21,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:39:21,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:39:21,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:39:21,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:39:21,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:39:21,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:39:21,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:39:21,930 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:39:21,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:39:21,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:39:21,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b [2022-07-13 15:39:22,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:39:22,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:39:22,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:39:22,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:39:22,232 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:39:22,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_k.i [2022-07-13 15:39:22,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78af1f73/639ab8f6f3e740d0bd46581294d23302/FLAGa4efc2aa0 [2022-07-13 15:39:22,695 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:39:22,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i [2022-07-13 15:39:22,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78af1f73/639ab8f6f3e740d0bd46581294d23302/FLAGa4efc2aa0 [2022-07-13 15:39:23,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78af1f73/639ab8f6f3e740d0bd46581294d23302 [2022-07-13 15:39:23,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:39:23,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:39:23,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:39:23,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:39:23,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:39:23,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2685795d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23, skipping insertion in model container [2022-07-13 15:39:23,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:39:23,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:39:23,266 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/loop-new/count_by_k.i[891,904] [2022-07-13 15:39:23,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:39:23,280 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:39:23,289 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/loop-new/count_by_k.i[891,904] [2022-07-13 15:39:23,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:39:23,301 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:39:23,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23 WrapperNode [2022-07-13 15:39:23,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:39:23,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:39:23,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:39:23,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:39:23,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,325 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-13 15:39:23,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:39:23,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:39:23,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:39:23,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:39:23,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:39:23,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:39:23,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:39:23,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:39:23,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (1/1) ... [2022-07-13 15:39:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:39:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:23,373 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) [2022-07-13 15:39:23,374 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 [2022-07-13 15:39:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:39:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:39:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:39:23,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:39:23,447 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:39:23,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:39:23,581 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:39:23,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:39:23,586 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 15:39:23,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:39:23 BoogieIcfgContainer [2022-07-13 15:39:23,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:39:23,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:39:23,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:39:23,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:39:23,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:39:23" (1/3) ... [2022-07-13 15:39:23,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291d53db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:39:23, skipping insertion in model container [2022-07-13 15:39:23,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:39:23" (2/3) ... [2022-07-13 15:39:23,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291d53db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:39:23, skipping insertion in model container [2022-07-13 15:39:23,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:39:23" (3/3) ... [2022-07-13 15:39:23,603 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2022-07-13 15:39:23,617 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:39:23,617 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:39:23,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:39:23,683 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@61f87056, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@282bacaa [2022-07-13 15:39:23,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:39:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 15:39:23,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:23,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:23,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2022-07-13 15:39:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:23,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363973733] [2022-07-13 15:39:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:23,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363973733] [2022-07-13 15:39:23,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363973733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:39:23,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:39:23,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:39:23,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776685538] [2022-07-13 15:39:23,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:39:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:39:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:39:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:39:23,884 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:23,896 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-13 15:39:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:39:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-13 15:39:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:23,904 INFO L225 Difference]: With dead ends: 21 [2022-07-13 15:39:23,904 INFO L226 Difference]: Without dead ends: 9 [2022-07-13 15:39:23,907 INFO L412 NwaCegarLoop]: 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 [2022-07-13 15:39:23,911 INFO L413 NwaCegarLoop]: 14 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, 14 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 [2022-07-13 15:39:23,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:39:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-13 15:39:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-13 15:39:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-07-13 15:39:23,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2022-07-13 15:39:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:23,936 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-07-13 15:39:23,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-07-13 15:39:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 15:39:23,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:23,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:23,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:39:23,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2022-07-13 15:39:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:23,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723373941] [2022-07-13 15:39:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:23,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:24,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:24,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723373941] [2022-07-13 15:39:24,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723373941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:39:24,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:39:24,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:39:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080207287] [2022-07-13 15:39:24,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:39:24,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:39:24,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:39:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:39:24,138 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:24,171 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-07-13 15:39:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:39:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-13 15:39:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:24,172 INFO L225 Difference]: With dead ends: 15 [2022-07-13 15:39:24,172 INFO L226 Difference]: Without dead ends: 11 [2022-07-13 15:39:24,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:39:24,174 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:24,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:39:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-13 15:39:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-07-13 15:39:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-07-13 15:39:24,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2022-07-13 15:39:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:24,178 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-07-13 15:39:24,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-07-13 15:39:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 15:39:24,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:24,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:24,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:39:24,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2022-07-13 15:39:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:24,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555808922] [2022-07-13 15:39:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:24,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555808922] [2022-07-13 15:39:24,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555808922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144857953] [2022-07-13 15:39:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:24,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:24,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:24,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:39:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 15:39:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:24,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:24,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144857953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:24,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:24,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-07-13 15:39:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522949181] [2022-07-13 15:39:24,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 15:39:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 15:39:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:39:24,526 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:24,598 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-07-13 15:39:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:39:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 9 [2022-07-13 15:39:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:24,600 INFO L225 Difference]: With dead ends: 20 [2022-07-13 15:39:24,600 INFO L226 Difference]: Without dead ends: 16 [2022-07-13 15:39:24,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:39:24,602 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:24,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:39:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-13 15:39:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-13 15:39:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-07-13 15:39:24,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2022-07-13 15:39:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:24,607 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-07-13 15:39:24,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-07-13 15:39:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 15:39:24,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:24,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:24,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:24,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:24,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1583233494, now seen corresponding path program 2 times [2022-07-13 15:39:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165971093] [2022-07-13 15:39:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165971093] [2022-07-13 15:39:24,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165971093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150499699] [2022-07-13 15:39:24,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:39:24,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:24,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:24,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:24,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:39:24,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:39:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:39:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:25,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:25,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150499699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:25,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:25,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-07-13 15:39:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886517331] [2022-07-13 15:39:25,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 15:39:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 15:39:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-13 15:39:25,153 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:25,351 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-07-13 15:39:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:39:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 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 15 [2022-07-13 15:39:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:25,354 INFO L225 Difference]: With dead ends: 30 [2022-07-13 15:39:25,354 INFO L226 Difference]: Without dead ends: 26 [2022-07-13 15:39:25,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:39:25,358 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:25,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:39:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-13 15:39:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-13 15:39:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-07-13 15:39:25,377 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2022-07-13 15:39:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:25,377 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-07-13 15:39:25,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-07-13 15:39:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 15:39:25,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:25,380 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:25,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 15:39:25,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 15:39:25,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:25,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1226953280, now seen corresponding path program 3 times [2022-07-13 15:39:25,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:25,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456043579] [2022-07-13 15:39:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:25,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:25,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456043579] [2022-07-13 15:39:25,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456043579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:25,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623233095] [2022-07-13 15:39:25,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:39:25,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:25,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:25,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:39:25,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-13 15:39:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 15:39:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:25,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623233095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:26,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:26,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-13 15:39:26,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56223670] [2022-07-13 15:39:26,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 15:39:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 15:39:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2022-07-13 15:39:26,188 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:26,647 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2022-07-13 15:39:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 15:39:26,648 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 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 25 [2022-07-13 15:39:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:26,649 INFO L225 Difference]: With dead ends: 50 [2022-07-13 15:39:26,649 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 15:39:26,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=625, Invalid=1267, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 15:39:26,651 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:26,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:39:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 15:39:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-13 15:39:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-07-13 15:39:26,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 25 [2022-07-13 15:39:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:26,658 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-07-13 15:39:26,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-07-13 15:39:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 15:39:26,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:26,660 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:26,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:26,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:26,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1096199572, now seen corresponding path program 4 times [2022-07-13 15:39:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090670949] [2022-07-13 15:39:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:27,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090670949] [2022-07-13 15:39:27,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090670949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759303138] [2022-07-13 15:39:27,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:39:27,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:27,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:27,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:27,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:39:27,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:39:27,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 15:39:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:27,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:28,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759303138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:28,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:28,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2022-07-13 15:39:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956661177] [2022-07-13 15:39:28,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:28,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 15:39:28,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 15:39:28,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 15:39:28,209 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 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) [2022-07-13 15:39:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:29,525 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-07-13 15:39:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 15:39:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 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 45 [2022-07-13 15:39:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:29,526 INFO L225 Difference]: With dead ends: 90 [2022-07-13 15:39:29,526 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 15:39:29,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2340, Invalid=4632, Unknown=0, NotChecked=0, Total=6972 [2022-07-13 15:39:29,530 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 117 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:29,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 31 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:39:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 15:39:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-13 15:39:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-07-13 15:39:29,540 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 45 [2022-07-13 15:39:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:29,540 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-07-13 15:39:29,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 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) [2022-07-13 15:39:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-07-13 15:39:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-13 15:39:29,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:29,542 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:29,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:29,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:29,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:29,764 INFO L85 PathProgramCache]: Analyzing trace with hash -246641092, now seen corresponding path program 5 times [2022-07-13 15:39:29,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:29,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16458310] [2022-07-13 15:39:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:29,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16458310] [2022-07-13 15:39:30,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16458310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364718001] [2022-07-13 15:39:30,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:39:30,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:30,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:30,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:39:30,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-07-13 15:39:30,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 15:39:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:31,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:34,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364718001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:34,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:34,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 103 [2022-07-13 15:39:34,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121993948] [2022-07-13 15:39:34,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:34,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-13 15:39:34,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:34,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-13 15:39:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2168, Invalid=8338, Unknown=0, NotChecked=0, Total=10506 [2022-07-13 15:39:34,100 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:42,453 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2022-07-13 15:39:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-13 15:39:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 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 85 [2022-07-13 15:39:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:42,456 INFO L225 Difference]: With dead ends: 170 [2022-07-13 15:39:42,456 INFO L226 Difference]: Without dead ends: 166 [2022-07-13 15:39:42,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7456 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=9838, Invalid=22742, Unknown=0, NotChecked=0, Total=32580 [2022-07-13 15:39:42,462 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 215 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:42,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:39:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-13 15:39:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-13 15:39:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2022-07-13 15:39:42,479 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 85 [2022-07-13 15:39:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:42,480 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2022-07-13 15:39:42,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2022-07-13 15:39:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-13 15:39:42,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:42,482 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:42,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:42,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1344997492, now seen corresponding path program 6 times [2022-07-13 15:39:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562894177] [2022-07-13 15:39:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:42,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562894177] [2022-07-13 15:39:45,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562894177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667545138] [2022-07-13 15:39:45,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:39:45,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:45,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:45,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:39:45,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2022-07-13 15:39:45,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-13 15:39:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:45,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:53,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667545138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:53,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:53,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 166 [2022-07-13 15:39:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292908893] [2022-07-13 15:39:53,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:53,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-07-13 15:39:53,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-07-13 15:39:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9819, Invalid=17571, Unknown=0, NotChecked=0, Total=27390 [2022-07-13 15:39:53,777 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 166 states, 166 states have (on average 1.9939759036144578) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:13,417 INFO L93 Difference]: Finished difference Result 330 states and 409 transitions. [2022-07-13 15:40:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-07-13 15:40:13,417 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9939759036144578) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 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 165 [2022-07-13 15:40:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:13,419 INFO L225 Difference]: With dead ends: 330 [2022-07-13 15:40:13,420 INFO L226 Difference]: Without dead ends: 326 [2022-07-13 15:40:13,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22126 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=35730, Invalid=68922, Unknown=0, NotChecked=0, Total=104652 [2022-07-13 15:40:13,428 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 474 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:13,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 36 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:40:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-13 15:40:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-07-13 15:40:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.003076923076923) internal successors, (326), 325 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 326 transitions. [2022-07-13 15:40:13,455 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 326 transitions. Word has length 165 [2022-07-13 15:40:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:13,455 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 326 transitions. [2022-07-13 15:40:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9939759036144578) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 326 transitions. [2022-07-13 15:40:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-07-13 15:40:13,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:13,470 INFO L195 NwaCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:13,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 15:40:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:13,684 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1186490924, now seen corresponding path program 7 times [2022-07-13 15:40:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233053622] [2022-07-13 15:40:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:23,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233053622] [2022-07-13 15:40:23,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233053622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839558110] [2022-07-13 15:40:23,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:40:23,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:23,830 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:23,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:40:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 162 conjunts are in the unsatisfiable core [2022-07-13 15:40:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:28,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:56,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839558110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:56,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:56,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163, 163] total 326 [2022-07-13 15:40:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764422500] [2022-07-13 15:40:56,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 326 states [2022-07-13 15:40:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 326 interpolants. [2022-07-13 15:40:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38819, Invalid=67131, Unknown=0, NotChecked=0, Total=105950 [2022-07-13 15:40:56,787 INFO L87 Difference]: Start difference. First operand 326 states and 326 transitions. Second operand has 326 states, 326 states have (on average 1.9969325153374233) internal successors, (651), 326 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:42:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:42:42,705 INFO L93 Difference]: Finished difference Result 650 states and 809 transitions. [2022-07-13 15:42:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2022-07-13 15:42:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 326 states, 326 states have (on average 1.9969325153374233) internal successors, (651), 326 states have internal predecessors, (651), 0 states have call successors, (0), 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 325 [2022-07-13 15:42:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:42:42,708 INFO L225 Difference]: With dead ends: 650 [2022-07-13 15:42:42,709 INFO L226 Difference]: Without dead ends: 646 [2022-07-13 15:42:42,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1129 GetRequests, 486 SyntacticMatches, 1 SemanticMatches, 642 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89046 ImplicationChecksByTransitivity, 139.5s TimeCoverageRelationStatistics Valid=141850, Invalid=272242, Unknown=0, NotChecked=0, Total=414092 [2022-07-13 15:42:42,730 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 955 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 15:42:42,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 26 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 15:42:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-07-13 15:42:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-07-13 15:42:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.0015503875968992) internal successors, (646), 645 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:42:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 646 transitions. [2022-07-13 15:42:42,809 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 646 transitions. Word has length 325 [2022-07-13 15:42:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:42:42,809 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 646 transitions. [2022-07-13 15:42:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 326 states, 326 states have (on average 1.9969325153374233) internal successors, (651), 326 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:42:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 646 transitions. [2022-07-13 15:42:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-07-13 15:42:42,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:42:42,824 INFO L195 NwaCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:42:42,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 15:42:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:42:43,037 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:42:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:42:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1765159060, now seen corresponding path program 8 times [2022-07-13 15:42:43,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:42:43,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018971676] [2022-07-13 15:42:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:42:43,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:42:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat